Academic literature on the topic 'Adhesive tensile'
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Journal articles on the topic "Adhesive tensile"
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Karpiesiuk, Jacek, and Tadeusz Chyzy. "The effects of various parameters on the strengths of adhesives layer in a lightweight floor system." Open Engineering 10, no. 1 (June 10, 2020): 443–53. http://dx.doi.org/10.1515/eng-2020-0057.
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AbstractThe article presents the results of shear and tensile strength of deformable cement adhesives, reinforced by fiberglass mesh with a different weight in a lightweight floor system without screeds. The substrate under adhesive was EPS and XPS thermal insulation. Tests were carried out in dry, wet conditions as well as during freezing and thawing. On their basis, it can be concluded that the larger contact surface of the EPS thermal insulation with the deformable adhesive C2S1 increases the adhesive’s tensile strength. This surface is not important using C2S2 adhesives or when the substrate is made from rough insulation XPS. It was generally found that the higher weight of the fibreglass mesh in deformable cement adhesives has a more favorable effect on their shear strength. Water absorption does not significantly affect the adhesion of terracotta, and in some configurations of components in this system increases it. The adhesive with the symbol C2S2 compared to C2S1 has a higher tensile and shear strength using the same materials. Frost conditions do not allow for long-term use of this type of floor construction in snow and ice protection systems. This experimental research shows that an economical solution with optimal strength consists of XPS insulation, 205 g/m2 mesh, C2S1 adhesive.
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Yokoyama, T. "Experimental determination of impact tensile properties of adhesive butt joints with the split Hopkinson bar." Journal of Strain Analysis for Engineering Design 38, no. 3 (April 1, 2003): 233–45. http://dx.doi.org/10.1243/030932403765310563.
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The tensile strength and energy absorption of adhesive butt joints at high rates of loading are determined with a tensile split Hopkinson bar using a cylindrical specimen. A commercially available single-component cyanoacrylate adhesive (instantaneous adhesive) and two different adherend materials are used in the adhesion tests. The impact tensile strength of the cyanoacrylate adhesive butt joints is determined from the applied tensile stress history at failure initiation. The impact absorbed energy is obtained by numerical integration of dynamic tensile load-adhesive deformation data. Comparative tension tests at low and intermediate rates of loading are performed on an Instron testing machine. An axisymmetric finite element analysis is carried out to investigate the stress distributions in the adhesive layer of the cyanoacrylate adhesive butt joints. The effects of loading rate, adherend material and adhesive layer thickness on the tensile strength and energy absorption of the cyanoacrylate adhesive butt joints are examined in detail. It is shown that the joint tensile strength increases significantly with increasing loading rate and is greatly affected by both the adhesive layer thickness and the adherend materials. The limitations of the technique are discussed.
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Oliveira, Simone Gomes Dias de, Carlos Enrique Cuevas-Suárez, Carine Tais Welter Meereis, Josiane Kuhn Rutz, Ricardo Alfredo Carrillo-Cotto, Cesar Henrique Zanchi, Rafael Guerra Lund, and Evandro Piva. "A new method for evaluating the retentive efficacy of different denture adhesives." Brazilian Journal of Oral Sciences 17 (December 11, 2018): e181357. http://dx.doi.org/10.20396/bjos.v17i0.8654218.
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Aim: The aim of this study was to evaluate a new method for measuring the retention values of different denture adhesives. Methods: The adhesive strength values of three different commercial denture adhesives (Corega powder, Corega adhesive tape and Ultra Corega cream) were evaluated using three different moisturizing agents (distilled water, artificial saliva and natural saliva). The adhesive test was performed on a universal testing machine, after applying the adhesive products to acrylic resin specimens, under two different test conditions (wetting or dipping). Tensile bond strength values in MPa were obtained for each denture adhesive presentation and test condition. Viscosity of the denture adhesives mixed with the different moisturizing agents was determined using a rotary rheometer. Maximum viscosity values were analyzed using the one-way ANOVA test. Tensile bond strength data was analyzed using Kruskal-Wallis and the Tukey’s test. Pooled data of each denture adhesive presentations for all test conditions was also carried out. Correlation between viscosity and pooled tensile strength values was analyzed through linear regression analysis. A significance level of α=0.05 was set for all analyses. Results: Results showed that statistically higher adhesion strength was obtained with tape and cream adhesives when using natural saliva as moisturizing agents (p<0.05). The adhesive strength values obtained with the dipping method were similar to those obtained with the conventional wetting method. The denture retention strength was influenced by both the denture adhesive type and moisturizing agent used. Conclusion: The dipping method showed to be a reliable test capable to simulate the oral conditions and should be better explored in further studies.
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Clerc, Gaspard, Thomas Lüthi, Peter Niemz, and Jan Willem G. Van de Kuilen. "Reaction kinetics investigation in relation to the influence of humidity on fatigue behavior of wood lap joints." Holzforschung 74, no. 9 (September 25, 2020): 865–80. http://dx.doi.org/10.1515/hf-2019-0136.
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AbstractIt is generally assumed that the properties of wood against fatigue are good, but little is known about the properties of adhesively bonded wood, which represents today most of the wood-based products. Lap-shear samples glued with three common wood adhesives [two ductile one-component polyurethane (1C-PUR) systems and one brittle phenol resorcinol formaldehyde (PRF) adhesive] were tested under cyclical loads at three different climates [20°C, 35% − 50% − 85% relative humidity (RH)]. For the analysis of data, an empirical model based on reaction kinetics was developed. In addition, a probabilistic model was used to estimate the endurance limit and the expected run-out lifetime. Both models were combined to accurately model fatigue at high and low relative stress intensity. It was shown that ductile 1C-PUR adhesives perform better than the brittle adhesive system under dry climates (35%–50% RH). However, for higher RH, the brittle PRF adhesive showed better performance, most probably due to a better wood-adhesive adhesion in wet climate. An average endurance limit for tensile shear stresses between 20% and 48% of the mean tensile shear strength (TSS) was estimated for the tested adhesives. It was shown that the model parameters could be linked to fundamental physical constants through the reaction kinetics approach; however, further research is needed to correlate these parameters to specimen-specific quantities.
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Grundmann, Neele, Hauke Brüning, Konstantinos Tserpes, Tim Strohbach, and Bernd Mayer. "Influence of Embedding Fiber Optical Sensors in CFRP Film Adhesive Joints on Bond Strength." Sensors 20, no. 6 (March 17, 2020): 1665. http://dx.doi.org/10.3390/s20061665.
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The increasing utilization of carbon fiber reinforced plastic (CFRP) in the aeronautical industry calls for a structural health monitoring (SHM) system for adhesively bonded CFRP joints. Optical glass fiber with inscribed fiber Bragg gratings (FBGs) is a promising technology for a SHM system. This paper investigates the intrusive effect of embedding optical glass fibers carrying FBGs on adhesive bond strength and adhesive layer thickness and quality. Embedding the optical glass fibers directly in the adhesive bond has the advantage of directly monitoring the targeted structure but poses the risk of significantly reducing the bond strength. Optical glass fibers with different cladding diameters (50, 80, 125 µm) and coating types (polyimide, with a thickness of 3−8 µm, and acrylate, with a thickness of ~35 µm) are embedded in structural and repair film adhesives here. Without embedded optical glass fibers, the film adhesives have an adhesive layer thickness of ~90 µm (structural) and ~100 µm (repair) after curing. The intrusive effect of the fiber embedding on the adhesive bond strength is investigated here with quasi static and fatigue single lap joint (SLJ) tensile shear tests. Also, the influence of hydrothermal aging procedures on the quasi static tensile shear strength is investigated. It is found that optical glass fibers with a total diameter (glass fiber cladding + coating) of ~145 µm significantly reduce the quasi static tensile shear strength and increase the adhesive layer thickness and number of air inclusions (or pores) in the structural film adhesive joints. In the repair adhesive joints, no significant reduction of quasi static tensile shear strength is caused by the embedding of any of the tested fiber types and diameters. However, an increase in the adhesive layer thickness is detected. In both adhesive films, no effect on the quasi-static tensile shear strength is detected when embedding optical glass fibers with total diameters <100 µm. The applied aging regime only affects the repair film adhesive joints, and the structural film adhesive joints show no significant reduction. A polyimide-coated 80 µm optical glass fiber is selected for fatigue SLJ tensile shear tests in combination with the more sensitive structural film adhesive. No significant differences between the S-N curves and tensile shear fatigue strength of the reference samples without embedded optical fibers and the samples carrying the polyimide-coated 80 µm optical glass fibers are detected. Thus, it is concluded that the influences of embedding optical glass fibers with total diameters <100 µm on the fatigue limit of the tested film adhesive joints is negligible.
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Imanaka, Makato, Yusuke Fukuchi, Waichiro Kishimoto, Kozo Okita, Hideaki Nakayama, and Hiroyoshi Nagai. "Fatigue Life Estimation of Adhesively Bonded Lap Joints." Journal of Engineering Materials and Technology 110, no. 4 (October 1, 1988): 350–54. http://dx.doi.org/10.1115/1.3226061.
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This paper describes a method of estimating the fatigue life of adhesively bonded lap joints on the basis of the stress analysis in adhesive layer with finite element method. First, cyclic tensile fatigue tests were conducted for adhesively bonded lap joints with different lap length and adhesive layer thickness. The results were evaluated from the viewpoint of the maximum values of both tensile and shear stress obtained numerically, instead of the apparent stress. Then these standardized fatigue strength were compared with those of adhesively bonded butt joints of a thin wall tube under cyclic tensile and fully reversed torsional load conditions. The results indicate that fatigue strength of lap joints evaluated from the maximum tensile stress of the adhesive layer agrees well with the fatigue strength of adhesively bonded butt joints of thin wall tube under cyclic tensile load condition. It is confirmed that fatigue strength of lap joints can be estimated adequately based on the fatigue strength of the butt joint of thin wall tube and the numerical results for the stress state of adhesive layer.
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Sheng, Li. "Influence of Nano Materials on the Properties of Epoxy Resin Structural Adhesives." Applied Mechanics and Materials 174-177 (May 2012): 1227–31. http://dx.doi.org/10.4028/www.scientific.net/amm.174-177.1227.
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Nano SiO2 is employed in this research to modify the epoxy resin structural adhesives, and the law how different volumes of nano material influence the tensile and adhesive properties is studied. The experimental results indicate that incorporation of Nano SiO2 improves the tensile and adhesive properties of structural adhesives, yet if its volume fraction exceeds 5%, the modified result is undeniable. Moreover, high-temperature processing of structural adhesives will achieve better properties.
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Sun, Lei, and Wenjun Yi. "Analysis of the Influence of Shrinkage Tensile Stress in Potting Material on the Anti-Overload Performance of the Circuit Board." Sensors 21, no. 7 (March 26, 2021): 2316. http://dx.doi.org/10.3390/s21072316.
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In this article, the influence of shrinkage tensile stress in potting materials on the anti-overload performance of a circuit board was studied. Firstly, the phenomenon of shrinkage tensile stress in common potting materials was analyzed, and it was found that the commonly used potting adhesives displayed large shrinkage characteristics. Secondly, a small experiment was set up to verify that the shrinkage tensile stress of potting adhesives would lead to printed circuit board (PCB) deformation, and the shrinkage stress was contrary to the acceleration direction of overload. Thirdly, the influence of potting adhesives on the overload resistance of the PCB was analyzed. However, the shrinkage tensile stress in the potting adhesive weakened the anti-overload ability of the circuit board. When there was a small amount of expansion stress in the potting adhesive, the overload resistance of the circuit board could be partially increased. From the analysis, it is indicated that a material with a certain expansion property, elasticity, and dense structure should be selected as the potting adhesive. This article provides a reference for improving the overload resistance of electronic devices.
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Maćkowiak, Paweł, Dominika Płaczek, and Agnieszka Sołtysiak. "Mechanical properties of Methacrylic Plexus MA300 adhesive material determined in tensile test and butt joints of aluminum thick plates." MATEC Web of Conferences 290 (2019): 01007. http://dx.doi.org/10.1051/matecconf/201929001007.
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Adhesive joints are an alternative method of joining elements. New adhesives achieve cohesion and adhesion strength comparable with plastics used for structural components and coatings. Bonding is faster, simpler and cheaper. For this reason, adhesive joints are increasingly replacing other types of connections. Tests show that the material properties in the cast adhesive specimens differ from the ones determined in the joint. Adhesive producers most often describe the strength of the overlap joint tested in accordance with ASTM D1002. Strength, modulus of elasticity and elongation to break tested in accordance with ASTM D638 are reported less frequently. The article presents a method for determining the mechanical properties of the adhesive in a butt joint and differences in the determined values in relation to the cast specimens on the example of methacrylic adhesive Plexus MA300. The tests were carried out for joining aluminium rod with a square cross-section of 15 mm x 15 mm and adhesive layer thickness of approximately 1 mm. The fractures of cast specimens and butt joints were analyzed.
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Jung, J. W., and J. Carlos Santamarina. "Hydrate adhesive and tensile strengths." Geochemistry, Geophysics, Geosystems 12, no. 8 (August 2011): n/a. http://dx.doi.org/10.1029/2010gc003495.
Full textDissertations / Theses on the topic "Adhesive tensile"
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Sterley, Magdalena. "Characterisation of green-glued wood adhesive bonds." Doctoral thesis, Linnéuniversitetet, Institutionen för teknik, TEK, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-18606.
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The gluing of unseasoned wood, called green gluing, is a relatively new sawmill process, implying a radically changed order of material flow in the production of value-added wood-based products. It facilitates the enhancement of raw material recovery and value yield by integrating defect elimination and gluing already before kiln drying. The present study evaluates green glued adhesive bonds in flatwise glued beams and finger joints. The main part of this work deals with green gluing using a moisture curing polyurethane adhesive (PUR). Standardised test methods and specially designed, small scale, specimens were used for the determination of the strength, fracture energy and the ductility of both dry- and green glued bonds in tension and in shear. Using the small scale specimens it was possible to capture the complete stress versus deformation curves, including also their unloading part. An optical system for deformation measurement was used for the analysis of bond behaviour. The influence of moisture content during curing and temperature after curing on the adhesive chemical composition and on the mechanical properties was investigated. Furthermore, the moisture transport through the adhesive bond during curing was tested. Finally, microscopy studies were performed for analysis of bond morphology and fracture. The results show that two significant factors influence the shear strength of green glued bonds: wood density and adhesive spread rate. Bonds which fulfil the requirements according to EN 386 could be obtained within a wide range of process parameters. The small specimen tests showed that green glued PUR bonds can reach the same strength and fracture energy, both in shear and in tension, as dry glued bonds with the same adhesive amount. The local material properties of the bonds could be determined, thanks to the failure in the tests taking place within the adhesive bond itself and not in the wood. Following process factors were shown to cause lower bond strength: a) a low adhesive spread rate, b) high pressure and c) short pressing time in combination with low wood density and high moisture content. Moreover, the heat treatment of the cured PUR adhesive during drying influenced the chemical composition of the adhesive, providing for higher strength, stiffness and Tg of the adhesive, caused by an increased amount of highly ordered bidentate urea.
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Andersson, Viktor, and Andreas Larsson. "Project ABSS : Adhesive bonding of stainless steels." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-13707.
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This report aims to increase the scientific knowledge about long-term prospects for the adhesive and adhesive joints for bonding of stainless steels. The effects of water, temperature and chemicals on the adhesive and adhesive joints are investigated. Stainless steel plates are pretreated with a primer and isopropanol, there after joined together with single lap modeling. The strength of the joint is tested with a tensile test and additionally a watertightness test is performed to determine if the joints are watertight. For this project three versions of stainless steels is used and two different technologies of two- part adhesives, silicone and silane-modified polymer and one technology of tape, a double coated acrylic foam tape are tested. The result shows that all the adhesives fails cohesively and that tape fails partly adhesively. Result shows that all tests are affected by water, temperature and chemicals on different levels but tape is affected the most with a minimum of 40% loss in shear strength. Watertightness test shows that aged tape joints are not watertight. The polymer shows no signs of decreasing in shear strength and is watertight, but does become more viscous by aging. The report shows that a possible combination of adhesive and pretreatment that can withstand the effects of water, temperature and chemicals is found. The polymer presents a possibility to bond stainless steel with a simple pretreatment. Tape didn’t pass the test in a suitable way but presents opportunities if a sufficient pretreatment can be found.
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Johansson, Anton. "Influence of the adhesive on the mechanical properties in laminated multi-layer paperboard : Evaluation of two common dispersion adhesives, their failure modes, internal strength and influence on bending and tensile properties." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-33662.
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The objectives of the thesis were to investigate the adhesives influence on the mechanical properties in laminated multi-layer paperboard. The study also strived to find a method to investigate the interface strength of the adhesive layer. This was investigated by constructing handsheets of laminated paperboard by gluing a bulky, CTMP center ply, Chromofoil, of two different grammages, 290 g/m2 and 360 g/m2, together with two outer plies of ordinary copy paper, Multi- Copy 80 g/m2. The sheets were glued with two types of dispersion adhesives, a starch based adhesive and a polyvinyl acetate based adhesive. Twelve types of test specimens were constructed and tested in a series of mechanical tests, which involved a tensile test, a two-point bending test and a Scott Bond test. The method called “digital image correlation” was used trying to investigate the interface strength of the adhesive layer. The study also involved an evaluation of the possibility to predict the bending stiffness of laminated multi-layer paperboard by using calculations according to classic laminate theory. The results show that it is fully possible to use these calculated values as a prediction, with low risk of overestimating the bending stiffness of the paperboard and without involving the adhesive layer in the calculation. The method provided high absolute values in bending and tensile properties, which increased with increasing amount of glue applied. This came at the cost of grammage, which lead to low index values. The overall conclusion is that the effect from the adhesives is somewhat negative, since the mechanical properties would have been improved if the adhesive had been replaced with more fiber. The major source of errors during the experiments was the roughness of the manufacturing method. This lead to an uncertainty about whether the right amount of adhesive had been applied to the test specimens. Due to this the validity of the results could be questioned. Digital image correlation proved to be a rather sensitive method that requires a high accuracy setup and execution for it to be applicable in this type of study. The failure mode of the glue seam correlated well to the amount of glue applied. A lower amount of adhesive applied increases the likeliness of failure of the glue seam.
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Jacques, Paula [UNESP]. "Resistência adesiva de um sistema auto-condicionante e um convencional simplificado, aplicados à dentina tratada com diferentes condicionadores." Universidade Estadual Paulista (UNESP), 2002. http://hdl.handle.net/11449/95517.
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jacques_p_me_arafo.pdf: 6578711 bytes, checksum: 7ce3c1075cc06b0164a5b42ddcb9c7d0 (MD5)A resistência adesiva de um sistema auto-condicionante e um convencional simplificado, Clearfil SE Bond e Single Bond, respectivamente, quando aplicados à dentina superficial tratada com diferentes agentes condicionadores, foi avaliada por meio de ensaios mecânicos de microtração. Superfícies planas de dentina, obtidas removendo-se a superfície oclusal de 30 terceiros molares humanos foram polidas com lixa de granulação 600 antes da aplicação de diferentes agentes condicionadores, SE Primer, ácido fosfórico ou EDTA. O primer acidificado SE Primer foi aplicado sobre a superfície por 20 segundos, seguido de suave secagem com jatos de ar. O ácido fosfórico a 37% foi aplicado por 15 segundos, seguido de lavagem e remoção do excesso de água com papel absorvente e a solução de EDTA 0,5M pH7,2 foi aplicada por 30 segundos, também seguida de lavagem e secagem. Com exceção das superfícies que receberam a aplicação do primer acidificado, as demais foram mantidas úmidas para a posterior aplicação dos sistemas adesivos avaliados. Sobre a superfície coberta pelo sistema adesivo foi construída uma coroa em resina composta Z250 e os dentes foram mantidos em água a 37% por 24h. Após 500 ciclos térmicos em temperaturas de 5o e 55oC, cortes paralelos no sentido mesio-distal e cortes perpendiculares aos primeiros, no sentido vestibulo-lingual, permitiram a obtenção de amostras com área de secção transversal quadrangular de 1,0mm2 em número mínimo de 10 para cada dente. Cada amostra foi colada a um dispositivo especialmente desenvolvido, e este foi acoplado à uma máquina universal de testes operada à velocidade de 0,5mm/min. O lado correspondente à dentina de aproximadamente 50% das superfícies fraturadas após o ensaio mecânico foi analizado em MEV. Os resultados mostraram que o maior valor médio de resistência adesiva foi observado para a associação SE Primer... .
Microtensile bond strength of a self-etching primer and a conventional one-bottle system, Clearfi SE Bond and Single Bond, respectively, bonded to superficial dentin treated with different conditioners was investigated. Flat dentin surfaces obtained by removing the occlusal enamel with a diamond saw were ground with 600-grit SiCs under wet conditions to create the smear layer before the conditioners application. Three different dentin conditioning was performed, SE Primer, phosphoric acid and EDTA. The SE Primer was applied on dentin for 20 seconds followed by slight air-drying. Phosphoric acid (37%) was applied for 15 seconds followed by rinsing. EDTA 0.5M pH7.2 was applied for 30 seconds, also followed by water rinsing. Except for the surfaces that received the SE Primer conditioner, the surfaces were left moist by blot-drying the excess water. The adhesive systems were applied and a 5mm high composite resin (Z250) was built up covering the whole surface. After 24h of storage in water at 37oC the teeth were thermocycled for 500 cycles at preset temperatures of 5o and 55oC. The teeth were sectioned with a diamond saw, perpendicular to the adhesive interface to produce beams with 1.0mm2 of adhesive area. These specimens were then attached to a testing apparatus and a tensile load was applied by a universal machine at a crosshead speed of 0.5mm/min. After the micro-tensile bond test, the dentin side of 50% of the fractured surfaces was examined under a scanning electron microscope. The highest tensile bond strength mean was found for the association of SE Primer and Single Bond, 58.51MPa, followed by the association Clearfil SE Bond and EDTA, 47.81MPa. The remaining associations showed mean tensile bond strength statistically similar, except for the association Single Bond and EDTA, which showed the lowest... (Complete abstract, click electronic address below).
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Bas, Gamze S. "Predictive Modeling For Rate Dependent Toughened-Adhesive Behavior During Impact." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1499078572477787.
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LEE, Tung-Ying. "THE EFECT OF IMPURITIES IN WATER FROM LAKE ERIE ON THE ADHESIVE STRENGTH OF ICE TO WIND TURBINE MATERIALS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1310744454.
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Erhardt, Maria Carolina Guilherme. "Influencia do grau de mineralização do substrato dentinario na resistencia a microtração de tres sistemas adesivos." [s.n.], 2003. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289750.
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Orientador: Luiz Andre Freire PimentaDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O objetivo deste estudo in vitro foi determinar a influência de superfícies dentinárias desmineralizadas, normais e hipermineralizadas na resistência adesiva (RA) dos sistemas adesivos Clearfil Liner Bond 2V / Kuraray Co. (CLB), Single Bond /3M (SB) e OptiBond Solo P/us / Kerr (OSP). Noventa incisivos bovinos foram selecionados, tendo suas superfícies vestibulares desgastadas com lixas de carbeto de silício em granulação decrescente. Os dentes foram aleatoriamente separados em três grupos, sendo submetidos a diferentes padrões de ciclagem de pH: G1 - dentina desmineralizada (DD)i G2 - dentina hipermineralizada (DH) e G3 - dentina normal (DN). Cada grupo, com seus respectivos padrões de superfície, foi novamente dividido por aleatorização em três subgrupos, para que recebessem a aplicação de um dos três sistemas adesivos, de acordo com a recomendação dos fabricantes. Blocos de compósito Filtek Z250 / 3M com altura de 5 mm foram incrementalmente confeccionados, e após 24 h de armazenagem em água destilada a 37 °C, os dentes foram preparados para serem submetidos ao teste de microtração. Dispostos em cortadeira metalográfica de precisão, os dentes foram seriadamente seccionados em fatias de 1,0 mm de espessura paralelamente ao longo eixo dental. Em seguida, dispositivos hour glass foram manualmente confeccionados com o auxílio de pontas diamantadas de granulação fina em alta rotação, com área adesiva final de 0,8 mm2. Os espécimes foram afixados individualmente em um dispositivo de microtração (MT Jig), acoplada em máquina de ensaio universal / EMIC, com velocidade de 0,5 mm/min. Após o teste, as duas porções fraturadas foram avaliadas em microscópio óptico (40x). Os valores de RA foram submetidos aos testes de análise de variância (ANOVA 2 fatores) e Tukey, com nível de significância de 5%. Os valores médios, expressos em MPa, foram: DN;SB= 31,05; DN/OSP= 24,49; DH;SB= 23,97; DH/CLB= 19,32; DN/CLB= 19,00; DH/OSP= 17,84; DD/CLB= 15,81; DD;SB= 13,62i DD/OSP= 5,22. Houve interação estatística entre os sistemas adesivos e os tipos de dentina avaliados. Em DN, os sistemas adesivos SB e OSP foram significativamente mais efetivos que o adesivo CLB. Em DD, os adesivos SB e CLB apresentaram os maiores valores de RA. Em DH, todos os sistemas adesivos se comportaram de maneira semelhante. Não foi possível observar um benefício claro advindo da utilização de um único sistema adesivo em todos os níveis de mineralização dentinária
Abstract: The purpose of this in vitro study was to investigate the effect of dentin mineralization level: demineralized, normal or hypermineralized, on microtensile bond strength of the adhesive systems Clearfil Liner Bond 2V / Kuraray Co. (CLB), Single Bond / 3M (SB) and OptiBond Solo Plus / Kerr (OSP). 90 freshly extracted incisive bovine teeth were selected, thoroughly cleaned and mechanically polished with wet silicon carbide papers. Teeth were randomly assigned into three groups, which were submitted to different pH-cycling models: Group I - demineralized dentin (DD); Group II - hypermineralized dentin (HD) and Group III normal dentin (ND). Each group, with its specific mineralization pattern, was randomly reassigned into three subgroups, in order to receive one of each adhesive application, according to manufacturers' instructions. Resin "crowns" with 5 mm high were incrementally constructed with Filtek Z250 /3M composite resin, and after 24 h of storage in distilled water at 37°C, teeth were prepared to micro-tensile testing. Samples were serially sectioned on a precision cutter in 1 mm slices, parallel to the dental long axis; and with diamond points, the hour glass devices were trimmed resulting in a cross-sectional area of 0.8 mm2. Each specimen was indMdual1y tested on a microtensile device (MT Jig) attached to a universal testing machine / EMIC with a crosshead speed of 0.5 mm/min. After testing, each specimen was visually evaluated. The bond strengths were statistically evaluated with two-way ANOVA and Tukey's test (p<0.05). The mean values obtained, recorded in MPa, were: ND;SB= 31.05; ND/OSP= 24.49; HD;SB= 23.97; HD/CLB= 19.32; ND/CLB= 19.00; HD/OSP= 17.84; DD/CLB= 15.81; DD;SB= 13.62; DD/OSP= 5.22. The statistical analysis showed a significant (p<0.05) interaction between the adhesive systems and the dentin substrates evaluated. SB and OSP presented the higher tensile bond strength values on ND. In terms of tensile bond strengths to DD, the highest mean values originated from SB and CLB. Regarding the HD, no differences were found among the adhesive systems evaluated. It could not be observed a real benefit from a unique adhesive system in all dentin mineralization levels
Mestrado
Dentística
Mestre em Clínica Odontológica
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Jacques, Paula. "Resistência adesiva de um sistema auto-condicionante e um convencional simplificado, aplicados à dentina tratada com diferentes condicionadores /." Araraquara : [s.n.], 2002. http://hdl.handle.net/11449/95517.
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Orientador: Josimeri HeblingBanca: Ricardo Marins de Carvalho
Banca: Elisa Maria Aparecida Giro
Resumo: A resistência adesiva de um sistema auto-condicionante e um convencional simplificado, Clearfil SE Bond e Single Bond, respectivamente, quando aplicados à dentina superficial tratada com diferentes agentes condicionadores, foi avaliada por meio de ensaios mecânicos de microtração. Superfícies planas de dentina, obtidas removendo-se a superfície oclusal de 30 terceiros molares humanos foram polidas com lixa de granulação 600 antes da aplicação de diferentes agentes condicionadores, SE Primer, ácido fosfórico ou EDTA. O primer acidificado SE Primer foi aplicado sobre a superfície por 20 segundos, seguido de suave secagem com jatos de ar. O ácido fosfórico a 37% foi aplicado por 15 segundos, seguido de lavagem e remoção do excesso de água com papel absorvente e a solução de EDTA 0,5M pH7,2 foi aplicada por 30 segundos, também seguida de lavagem e secagem. Com exceção das superfícies que receberam a aplicação do primer acidificado, as demais foram mantidas úmidas para a posterior aplicação dos sistemas adesivos avaliados. Sobre a superfície coberta pelo sistema adesivo foi construída uma coroa em resina composta Z250 e os dentes foram mantidos em água a 37% por 24h. Após 500 ciclos térmicos em temperaturas de 5o e 55oC, cortes paralelos no sentido mesio-distal e cortes perpendiculares aos primeiros, no sentido vestibulo-lingual, permitiram a obtenção de amostras com área de secção transversal quadrangular de 1,0mm2 em número mínimo de 10 para cada dente. Cada amostra foi colada a um dispositivo especialmente desenvolvido, e este foi acoplado à uma máquina universal de testes operada à velocidade de 0,5mm/min. O lado correspondente à dentina de aproximadamente 50% das superfícies fraturadas após o ensaio mecânico foi analizado em MEV. Os resultados mostraram que o maior valor médio de resistência adesiva foi observado para a associação SE Primer... (Resumo completo, clicar acesso eletrônico abaixo).
Abstract: Microtensile bond strength of a self-etching primer and a conventional one-bottle system, Clearfi SE Bond and Single Bond, respectively, bonded to superficial dentin treated with different conditioners was investigated. Flat dentin surfaces obtained by removing the occlusal enamel with a diamond saw were ground with 600-grit SiCs under wet conditions to create the smear layer before the conditioners application. Three different dentin conditioning was performed, SE Primer, phosphoric acid and EDTA. The SE Primer was applied on dentin for 20 seconds followed by slight air-drying. Phosphoric acid (37%) was applied for 15 seconds followed by rinsing. EDTA 0.5M pH7.2 was applied for 30 seconds, also followed by water rinsing. Except for the surfaces that received the SE Primer conditioner, the surfaces were left moist by blot-drying the excess water. The adhesive systems were applied and a 5mm high composite resin (Z250) was built up covering the whole surface. After 24h of storage in water at 37oC the teeth were thermocycled for 500 cycles at preset temperatures of 5o and 55oC. The teeth were sectioned with a diamond saw, perpendicular to the adhesive interface to produce beams with 1.0mm2 of adhesive area. These specimens were then attached to a testing apparatus and a tensile load was applied by a universal machine at a crosshead speed of 0.5mm/min. After the micro-tensile bond test, the dentin side of 50% of the fractured surfaces was examined under a scanning electron microscope. The highest tensile bond strength mean was found for the association of SE Primer and Single Bond, 58.51MPa, followed by the association Clearfil SE Bond and EDTA, 47.81MPa. The remaining associations showed mean tensile bond strength statistically similar, except for the association Single Bond and EDTA, which showed the lowest... (Complete abstract, click electronic address below).
Mestre
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Ribeiro, Josà Carlos Viana. "Influence of temporary cements on the bond strength of indirect restorations to dentin employing two resinous adhesive systems." Universidade Federal do CearÃ, 2007. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=684.
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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel SuperiorThe aim of this in vitro study was to evaluate the influence of residual temporary cements on the microtensile bond strength of indirect composite resin build-ups employing two types of adhesive systems. Thirty non-carious human third molars were selected and the occlusal enamel was removed to produce flat dentin surfaces. The surfaces were coated with provisional restorations fixed with either eugenol-containing temporary cement (Temp Bond), or non-eugenol temporary cement (Freegenol). After one week, the provisional restorations and residual cement were removed with a dental probe and one specimen of each group was selected for evaluation by atomic force microscopy to investigate the presence of remnants of temporary cements. For the control groups, no provisional restorations were made. The dentin surfaces were cleaned with pumice and treated either with a total-etch (TE) adhesive system (Adper Single Bond 2) or with a self-etch (SE) adhesive system (Adper Prompt). Composite resin build-ups (Filtek Z250) were fixed to the bonded dentin surfaces using resin luting cement (RelyX ARC). The bonded specimens were then cross-sectioned producing sticks of 0.9 mm2 of adhesive area. Microtensile bond strength testing was perfomed in a universal test machine at a rate of 0.5 mm/min until fracture occurred. Optical microscopic images and scanning electron micrographs of fractured surfaces were obtained and recorded for fractographic analysis. Bond strength values were submitted to analysis of variance (ANOVA) and t-Student tests to detect significant differences between groups. The results showed a significant reduction on microtensile bond strength values when Temp Bond cement was employed in comparison with the control groups either for TE (p = 0.0331) or SE (p = 0.0267) adhesive systems. Total-etch groups showed significantly higher bond strength values than self-etch groups (p < 0.0001). Optical and scanning electron microscopic analysis revealed a majority of mixed fractures (67%). Adhesive failure at dentin-adhesive interface was significantly higher for SE groups than for TE groups (p = 0.0001). Atomic force microscopic images showed that residues of both temporary cements remained on dentin surfaces even after mechanical cleansing and treatment with acids. Bond strengths of total-etch and self-etch adhesive systems were significantly lowered only when eugenol-containing temporary cement was used prior to bonding and cementation procedures.
O presente estudo experimental in vitro se propÃÂs a investigar a influÃÂncia de resÃÂduos de cimentos provisÃÂrios sobre a resistÃÂncia de uniÃÂo de restauraÃÂÃÂes indiretas de resina composta ÃÂ dentina, empregando-se dois sistemas adesivos resinosos, por meio de ensaio mecÃÂnico de microtraÃÂÃÂo. SuperfÃÂcies planas de dentina foram obtidas a partir da remoÃÂÃÂo do esmalte oclusal de 30 (trinta) dentes terceiros molares humanos sem lesÃÂes de cÃÂrie, extraÃÂdos por indicaÃÂÃÂo cirÃÂrgica ou ortodÃÂntica. Os espÃÂcimes foram distribuÃÂdos em 6 (seis) grupos, de acordo com o tipo de cimento provisÃÂrio e o tipo de sistema adesivo empregado. Discos de resina acrÃÂlica foram fixados ÃÂ superfÃÂcie dentinÃÂria dos espÃÂcimes empregando-se o cimento provisÃÂrio com eugenol Temp Bond ou o cimento sem eugenol Freegenol. ApÃÂs 7 (sete) dias em ÃÂgua destilada a 37ÃÂC, as restauraÃÂÃÂes provisÃÂrias e os resÃÂduos de cimento foram removidos com instrumento manual. Nos grupos-controle, nÃÂo foram empregadas restauraÃÂÃÂes provisÃÂrias. As superfÃÂcies dentinÃÂrias foram limpas com pasta de pedra-pomes e ÃÂgua e tratadas de acordo com o sistema adesivo empregado: condicionamento com ÃÂcido fosfÃÂrico a 37% e aplicaÃÂÃÂo do sistema adesivo Adper Single Bond 2 (SB2) ou aplicaÃÂÃÂo do sistema adesivo autocondicionante Adper Prompt (AP). Em seguida, blocos de resina composta (Filtek Z 250) foram fixados ao substrato dentinÃÂrio utilizando-se um cimento resinoso (RelyX ARC). AtravÃÂs de cortes seriados, foram obtidos corpos-de-prova em forma de palitos com ÃÂrea de interface adesiva de aproximadamente 0,9 mm2 que foram submetidos ao ensaio de microtraÃÂÃÂo em mÃÂquina universal de testes com velocidade de 0,5mm/min atÃÂ a ruptura. A resistÃÂncia adesiva foi expressa pela tensÃÂo de ruptura dos corpos-de-prova. Os modos de fratura das interfaces adesivas foram analisados por microscopia ÃÂptica digital e microscopia eletrÃÂnica de varredura. A presenÃÂa de resÃÂduos dos cimentos provisÃÂrios foi investigada por microscopia de forÃÂa atÃÂmica. Os resultados de resistÃÂncia adesiva foram submetidos ÃÂ anÃÂlise de variÃÂncia (ANOVA) de dois critÃÂrios e teste t-Student para detectar diferenÃÂas significativas entre os grupos. Observou-se uma reduÃÂÃÂo estatisticamente significativa da resistÃÂncia adesiva quando o cimento Temp Bond foi empregado em relaÃÂÃÂo aos grupos-controle, tanto com o sistema adesivo SB2 (p = 0,0331) quanto com o sistema AP (p = 0,0267). Os grupos em que o sistema SB2 foi utilizado apresentaram valores de resistÃÂncia adesiva estatisticamente superiores aos grupos com o sistema AP (p< 0,0001), independentemente do emprego ou nÃÂo de cimentos provisÃÂrios. A anÃÂlise dos modos de fratura mostrou uma maior ocorrÃÂncia de fraturas mistas (67%), sendo que nos grupos com o sistema de condicionamento ÃÂcido total a ocorrÃÂncia de fraturas adesivas na interface dentina-adesivo foi estatisticamente menor que nos grupos com o sistema autocondicionante (p = 0,0001). Com base nesses resultados, concluiu-se que resÃÂduos microscÃÂpicos dos dois cimentos provisÃÂrios permaneceram sobre a superfÃÂcie dentinÃÂria mesmo apÃÂs limpeza mecÃÂnica e tratamento com ÃÂcidos. PorÃÂm, apenas o cimento provisÃÂrio contendo eugenol reduziu significativamente a resistÃÂncia de uniÃÂo ÃÂ dentina das restauraÃÂÃÂes indiretas de resina, independentemente do sistema adesivo empregado.
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Araújo, Cíntia Tereza Pimenta de 1968. "Use of fluorescence in the performance evaluation of adhesive systems = Uso da fluorescência na avaliação do comportamento de sistemas adesivos." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289658.
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Orientador: Luis Alexandre Maffei Sartinni PaulilloTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: A microscopia confocal de varredura a laser (MCVL) é um recurso de visualização microscópica que permite a análise de materiais ou estruturas com requisitos mínimos de preparação de amostras de modo não destrutivo. Assim, os objetivos deste estudo foram: avaliar a influência da incorporação do corante fluorescente Rodamina B (R) nas propriedades mecânicas resistência coesiva (RC), módulo de elasticidade (ME) e resistência à flexão (RF) de 2 sistemas adesivos, o autocondicionante Clearfil SE Bond e o convencional Scotchbond Multi-Purpose (estudo 1); validar o método modificado de microtração (?TBS), em que micro-amostras de secção transversal de 0,09 mm2 foram testadas e verificar a influência da R na resistência à união a dentina e integridade interfacial através de microscopia confocal (estudo 2). Para avaliar a influência do corante, 0,16 mg/ml de R foram incorporados aos adesivos constituindo assim dois grupos para cada adesivo: grupos dos adesivos corados e não corados totalizando 4 grupos experimentais. Para a análise da RC, E e RF, os corpos de prova foram confeccionados a partir de uma matriz de silicone por adição. Sobre a matriz, foram dispensados 10 ?L de adesivo variando de acordo com cada grupo de adesivos corados e não corados. RC (n= 10), E e RF (n= 5) foram avaliadas em máquina de ensaio universal a 0,5 mm/min, até a ruptura da amostra. Para visualização em microscopia confocal e análise da resistência à união os adesivos foram aplicados à superfície plana da dentina oclusal de 32 pré-molares humanos. Após a realização dos procedimentos adesivos, realizaram-se as restaurações (blocos de 16 mm2) com Charisma Opal (Kulzer - cor A3). Em seguida, para a realização do teste modificado de microtração, micro-amostras em forma de palito (secção transversal 0,09 mm2) foram confeccionadas. Previamente ao ensaio mecânico, foi realizada através de MVCL a análise micromorfológica das microamostras dos grupos de adesivos corados. Posteriormente a resistência à união foi mensurada através do ensaio modificado de microtração a velocidade de 0,5 mm/min em máquina de ensaio universal. Os dados de todos os testes avaliados foram submetidos à análise de variância dois fatores. Os resultados mostraram que o comportamento dos sistemas adesivos investigados não se modificou, independente da presença do corante, pois não foram observadas diferenças significativas nas propriedades mecânicas estudadas: resistência à união, resistência coesiva, resistência flexural, módulo de elasticidade, bem como a integridade interfacial. A preparação de micro-amostras não comprometeu os resultados do ensaio de resistência adesiva. De acordo com os resultados obtidos e análise dos parâmetros: coeficiente de variação, porcentagem de padrão de fratura e incidência de falhas prematuras, concluiu-se que o teste modificado de microtração foi considerado um método confiável para a avaliação da resistência à união de sistemas adesivos. A técnica de visualização microscópica confocal produziu informações detalhadas da interface adesiva e pode ser bem indicada para a avaliação da efetividade de união de sistemas adesivos. Desta forma, é possível associar ambas as metodologias obtendo-se uma avaliação mais realista e confiável dos materiais restauradores
Abstract: The confocal laser scanning microscopic (CLSM) is a tool of visualization that allows microscopic analysis of materials or structures labeled with fluorescent dyes with minimal requirements of specimen's preparation nondestructively. The aims of this study were: to evaluate the influence of incorporation of fluorescent dye Rhodamine B (R) in the properties mechanical: cohesive strength (CS), elastic modulus (E) and flexural strength (FS) of the selfetching Clearfil SE Bond and etch-and-rinse Scotchbond Multi-Purpose (Study 1); validating the modified microtensile method using micro-specimens cross section of 0.09 mm2 (?TBS) and evaluate the influence of R in bond strength in dentin and interfacial integrity by confocal microscopy (study 2). To evaluate the influence of the dye, 0.16 mg/ml of R were incorporated into adhesives thus forming two groups for each adhesive: groups of labeled adhesives and no-labeled totaling 4 experimental groups. For the analysis of CS, E and FS the specimens were made from a silicone matrix. About the matrix were 10 ?L dispensed adhesive varying according to each group of adhesives stained or not. CS (n = 10), E and FS (n = 5) were evaluated in a universal testing machine at 0.5 mm/min until failure of the specimen. For visualization in confocal microscopy and bond strength analysis (n = 8), the adhesives were applied to the occlusal dentine surface 32 of human premolars. After procedures adhesives, composite crowns approximately (16 mm2) were built up with Charisma Opal (Kulzer - color A3). Then for testing modified microtensile, micro-specimens beam-shaped were prepared. Prior to mechanical testing micromorphological analysis of micro-sticks of the groups of labeled adhesives was performed using CLSM. Subsequently bond strength was measured using the modified microtensile test in a universal testing machine speed of 0.5 mm/min. The results showed that the behavior of the adhesive systems investigated did not change regardless of the presence of the dye, as there were no significant differences in mechanical properties studied: bond strength, tensile strength, flexural strength, modulus of elasticity, as well as interfacial integrity. The preparation of micro-specimens did not affect the results of the bond strength test. According to the analysis results and parameters: coefficient of variation percentage of fracture pattern and incidence of early failures, it is concluded that the modified microtensile test was considered a reliable method for evaluating the bond strength of adhesive systems. The confocal microscopic visualization technique yielded detailed information of the adhesive interface and can be well suited for evaluating the effectiveness of adhesive systems. Thus, it is possible to associate both methods give a more realistic and reliable adhesive restoration on the presence of fluorescent dye
Doutorado
Dentística
Doutora em Clínica Odontológica
Books on the topic "Adhesive tensile"
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Kindermann, M. R. A slow strain-rate tensile testing machine. Melbourne, Victoria: Dept. of Defence, Aeronautical Research Laboratory, 1989.
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Keller, Thomas. Use of fibre reinforced polymers in bridge construction. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2003. http://dx.doi.org/10.2749/sed007.
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<p>The aim of the present Structural Engineering Document, a state-of-the-art report, is to review the progress made worldwide in the use of fibre reinforced polymers as structural components in bridges until the end of the year 2000.<p> Due to their advantageous material properties such as high specific strength, a large tolerance for frost and de-icing salts and, furthermore, short installation times with minimum traffic interference, fibre reinforced polymers have matured to become valuable alternative building materials for bridge structures. Today, fibre reinforced polymers are manufactured industrially to semi-finished products and ccimplete structural components, which can be easily and quickly installed or erected on site.<p> Examples of semi-finished products and structural components available are flexible tension elements, profiles stiff in bending and sandwich panels. As tension elements, especially for the purpose of strengthening, strips and sheets are available, as weil as reinforcing bars for concrete reinforcement and prestressing members for internal prestressing or external use. Profiles are available for beams and columns, and sandwich constructions especially for bridge decks. During the manufacture of the structural components fibre-optic sensors for continuous monitoring can be integrated in the materials. Adhesives are being used more and more for joining components.<p> Fibre reinforced polymers have been used in bridge construction since the mid-1980s, mostly for the strengthening of existing structures, and increasingly since the mid-1990s as pilot projects for new structures. In the case of new structures, three basic types of applications can be distinguished: concrete reinforcement, new hybrid structures in combination with traditional construction materials, and all-composite applications, in which the new materials are used exclusively.<p> This Structural Engineering Document also includes application and research recommendations with particular reference to Switzerland.<p> This book is aimed at both students and practising engineers, working in the field of fibre reinforced polymers, bridge design, construction, repair and strengthening.
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Chang, G. Gordon. Cell adhesion: role of surface tension and fluid mechanics. 1989.
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United States. National Aeronautics and Space Administration., ed. Contamiantion [sic] removal using various solvents and methodologies: Final report. Brigham City, Utah: Morton Thiokol, Inc., Aerspace Group, Space Operations, 1989.
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G, Zilliac Gregory, and Ames Research Center, eds. Computational study of surface tension and wall adhesion effects on an oil film flow underneath an air boundary layer. Moffett Field, Calif: National Aeronautics and Space Administration, Ames Research Center, 1998.
Find full textBook chapters on the topic "Adhesive tensile"
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Higo, Y., S. Kazama, and K. Handa. "Evaluation of Adhesive Joint Tensile Strength by Elastic-Wave Transfer Function Method." In Nondestructive Characterization of Materials IV, 197–203. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4899-0670-0_24.
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Tserpes, Konstantinos, Elli Moutsompegka, Mareike Schlag, Kai Brune, Christian Tornow, Ana Reguero Simón, and Romain Ecault. "Characterization of Pre-bond Contamination and Aging Effects for CFRP Bonded Joints Using Reference Laboratory Methods, Mechanical Tests, and Numerical Simulation." In Adhesive Bonding of Aircraft Composite Structures, 51–117. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-319-92810-4_2.
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AbstractIn this chapter, the pre-bond contamination and ageing effects on carbon fiber reinforced plastic (CFRP) adherends and CFRP bonded joints are characterized by means of reference laboratory non-destructive testing (NDT) methods, mechanical tests, and numerical simulation. Contaminations from two fields of application are considered, namely in aircraft manufacturing (i.e. production) and for in-service bonded repair. The production-related scenarios comprise release agent, moisture, and fingerprint, while the repair-related scenarios comprise fingerprint, thermal degradation, de-icing fluid, and a faulty curing of the adhesive. For each scenario, three different levels of contamination were pre-set and applied, namely low, medium and high level. Furthermore, two types of samples were tested, namely coupons and pilot samples (a stiffened panel and scarf repairs). The CFRP adherends were contaminated prior to bonding and the obtained surfaces were characterized using X-ray photoelectron spectroscopy. After bonding, the joints were tested by ultrasonic testing. To characterize the effects of each contamination on the strength of the bonded joints, mode-I and mode-II fracture toughness tests, and novel centrifuge tests were conducted on the coupons, while tensile tests were performed on the scarfed samples. Additionally, numerical simulation was performed on CFRP stiffened panels under compression using the LS-DYNA finite element (FE) platform.
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Sawa, Toshiyuki, Katsuhiro Temma, and Hirohisa Ishikawa. "A Two-Dimensional Stress Analysis of Adhesive Butt Joints Subjected to Tensile Loads." In Applied Stress Analysis, 439–48. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0779-9_41.
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Sawa, Toshiyuki, Yuichi Nakano, and Kiyoshi Urae. "A Two-Dimensional Stress Analysis of a Butt Adhesive Joint Filled with Rigid Circular Fillers in the Adhesive Subjected to a Tensile Load." In Computational Mechanics ’95, 2407–12. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-79654-8_400.
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Popov, Valentin L. "Adhesion of a Thin Soft Matter Layer: The Role of Surface Tension." In Springer Tracts in Mechanical Engineering, 461–72. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60124-9_19.
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AbstractWe consider an adhesive contact between a thin soft layer on a rigid substrate and a rigid cylindrical indenter (“line contact”) taking the surface tension of the layer into account. First, it is shown that the boundary condition for the surface outside the contact area is given by the constant contact angle—as in the case of fluids in contact with solid surfaces. In the approximation of thin layer and under usual assumptions of small indentation and small inclination angles of the surface, the problem is solved analytically. In the case of a non-adhesive contact, surface tension makes the contact stiffer (at the given indentation depth, the contact half-width becomes smaller and the indentation force larger). In the case of adhesive contact, the influence of surface tension seems to be more complicated: For a flat-ended punch, it increases with increasing the surface tension, while for a wedge, it decreases. Thus, the influence of the surface tension on the adhesion force seems to be dependent on the particular geometry of the contacting bodies.
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Mehrsefat, N., S. M. R. Khalili, and M. Sharafi. "Thermal Cycling and Environmental Effect on Tensile Impact Behavior of Adhesive Single Lap Joints for Fiber Metal Laminate." In Conference Proceedings of the Society for Experimental Mechanics Series, 123–29. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-41766-0_14.
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Téot, Luc, Sergiu Fluieraru, and Christian Herlin. "Suture Edge Tension Control Technologies for Scar Improvement." In Textbook on Scar Management, 497–502. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44766-3_57.
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AbstractMechanotherapy of postoperative scarring is considered an effective measure to prevent pathological scars. Tension increases suture line enlargement, opening the way to infection. Several options have been proposed since decades and are currently used in practice, from adhesive sutures to adhesive dressings, reapproximation devices, and postoperative negative pressure. Closed incision negative pressure therapy (ciNPT) was recently proposed in at-risk patients, showing a significant difference in prevention of infection. These technologies offer a double effect of mechanical stabilization and aspiration of exudates and have recently been extended to different clinical indications. This chapter describes the recently developed technologies to diminish scar enlargement on a suture line and to prevent infection after extensive surgical procedures in thoracic, abdominal, plastic and orthopedic surgery.
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Etzler, Frank M., and Sorana Pisano. "Tablet Tensile Strength: Role of Surface Free Energy." In Adhesion in Pharmaceutical, Biomedical and Dental Fields, 51–74. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119323716.ch3.
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Etzler, Frank M., and Sorana Pisano. "Tablet Tensile Strength: Role of Surface Free Energy." In Advances in Contact Angle, Wettability and Adhesion, 397–418. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119117018.ch16.
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Guigue, A., L. Fletcher, R. Seghir, and F. Pierron. "IBII Test for High Strain Rate Tensile Testing of Adhesives." In Dynamic Behavior of Materials, Volume 1, 301–5. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95089-1_55.
Full textConference papers on the topic "Adhesive tensile"
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Lizarelli, Rosane F. Z., Walter G. Miranda, Jr., and Carlos d. P. Eduardo. "Dentin adhesive tensile strength after Nd:YAG laser application." In BiOS '99 International Biomedical Optics Symposium, edited by John D. B. Featherstone, Peter Rechmann, and Daniel Fried. SPIE, 1999. http://dx.doi.org/10.1117/12.348334.
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Šumiga, Barbara, Igor Karlovits, and Boštjan Šumiga. "Adhesion strength of temperature varied nanocellulose enhanced water based paper and cardboard adhesives." In 10th International Symposium on Graphic Engineering and Design. University of Novi Sad, Faculty of technical sciences, Department of graphic engineering and design,, 2020. http://dx.doi.org/10.24867/grid-2020-p19.
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Water-based dispersion adhesives consist of a solid adhesive dispersed in an aqueous phase. These adhesives contain water-soluble additives such as surfactants, emulsifiers, and protective colloids, which act as links between the solid adhesive particles and the aqueous phase. They prevent the adhesive particles from sticking together and separating during storage. During drying, these additives evaporate or are absorbed into the adhesive. Polyvinyl acetate (PVAc) and polyvinyl alcohol (PVOH) are further examples of ethylene copolymers. PVAc is used as an emulsion adhesive for production of bags, sacks and cartons. Recently there have been some preliminary investigations concerning the addition of nanocellulose as adhesion improver. Nanocellulose is a term that refers to nanostructured cellulose. It can be either cellulose nanocrystal (CNC or NCC), cellulose nanofibres (CNF) also called nanofibrillated cellulose (NFC), or bacterial nanocellulose, which refers to nanostructured cellulose produced by bacteria. CNF is a material consisting of nanofibrillated cellulose fibrils with a high aspect ratio (length to width ratio). In this study, we tested the adhesion strength of two PVAc adhesives by adding 0,5, 1 and 2% [wt.%] of two types of nanocellulose to two commercial adhesives. The adhesive was applied to the cardboard with a rod coater. To test the influence of temperature, we varied the mixture at two different temperatures (23 and 45°C). The adhered samples were tested for z-direction tensile strength (according to ISO 15754:2009) and T-peel test (ASTM D1876-08) on a mechanical testing device. The results showed no significant improvement in adhesion strength compared to pure adhesive, indicating that further optimization of the adhesive mixture and testing procedure is required.
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Teli, Samar, and Erol Sancaktar. "Stress States and Interference in Double Adhesive Layer Scarf and Butt Joints." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33416.
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The stress interference effects adhesively bonded scarf and butt joints were investigated when an additional adhesive layer was incorporated in overall joint design. Finite element models were developed and analyzed to compare interfacial stress states and peak stresses on the double adhesive layer joints with those on the single adhesive layer joints with respect to the scarf angle, adhesive layer separation (ALS) and adhesive modulus. This comparison was done in terms of stress ratio calculated as a ratio of interfacial peak stress on double adhesive layer joint to that an single adhesive layer joint. The tensile task results were correlated with the finite element analysis (FEA) results in terms of load ratio calculated as a ratio of failure load on single adhesive layer joint to that on double adhesive layer joint. Six scarf angles (15°, 30°, 45°, 60°, 75° and 90°), three ALS and adhesives were analyzed for this study.
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Khor, K. A., and P. Cheang. "Fracture Behavior and Tensile Adhesive Properties of HA Coatings." In ITSC 1997, edited by C. C. Berndt. ASM International, 1997. http://dx.doi.org/10.31399/asm.cp.itsc1997p0769.
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Abstract The attractive bioactive properties of HA are significantly reduced upon plasma spraying because of the phase transformation that accompanied the deposition process. One major factor that influence the extent to which the transformation occur appears to be the morphology and physical states of the HA raw powders. This paper reports the study on the influence of powder morphology and property on the fracture behaviour and tensile adhesive strength of plasma sprayed HA coatings. Three types of powders were used in the study; calcined HA (CHA), spray dried HA (SDHA) and flame spheroidised HA (SHA). The particle size range of 53 - 75 μm was employed for all 3 types of powders to effect an accurate comparison of the powders. Results show that the cohesive bond strength of the SHA coating was the highest because of the denser microstructure created by well-formed lamella splats. A correspondingly lower bond strength was recorded with less coherent coatings generated by agglomerated CHA and SDHA powders.
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Liu, Jiemin, and Toshiyuki Sawa. "Failure Properties of Adhesive Joints With Adhesively Filled Columns." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42224.
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Failure properties of bulk adhesive joints with Adhesively Filled Columns (AFCs) subjected to external loads were investigated by experimental method and finite element method (FEM). From the experiment results, it was found that the strengths of the bulk adhesive joints with AFCs increases considerably whether they are subjected to external tensile loads or lateral bending loads. And the joint strenghts increase with increasing of the depths of the blind holes. Failure process of the joints with AFCs was simulated by element birth-death technology developed in FEM. The conclusions obtained from FEM coincide with that obtained from the experiments.
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Natale, Thomas V. "Environmental Durability of Epoxy Adhesive/Galvanized Steel Tensile Shear Joints." In SAE International Congress and Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1988. http://dx.doi.org/10.4271/880532.
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Raos, Pero, Dražan Kozak, and Mirjana Lucić. "Stress-Strain Analysis of Single-Lap Tensile Loaded Adhesive Joints." In MATERIALS PROCESSING AND DESIGN; Modeling, Simulation and Applications; NUMIFORM '07; Proceedings of the 9th International Conference on Numerical Methods in Industrial Forming Processes. AIP, 2007. http://dx.doi.org/10.1063/1.2740956.
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MÜLLER, Miroslav. "RESEARCH ON MECHANICAL PROPERTIES OF SINGLE-COMPONENT EPOXY DESIGNED FOR BONDING OF STRUCTURAL JOINTS." In Rural Development 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/rd.2015.007.
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An adhesive bonding technology is among the basic methods of bonding. However, it is limited by several factors, e.g. a treatment of bonded surface. Structural adhesives are chemicals. It follows that there are significant differences in the mechanical properties among particular types. The aim of the research was to evaluate the mechanical properties of single-component epoxy adhesives used in the transportation industry. The effect of a surface treatment of the steel surface on bond strength was also evaluated. The tested sets were mutually compared using Anova F-test from the point of view of the influence on mechanical properties (the tensile strength of adhesives, the elongation of adhesives, the adhesive bond tensile lap-shear strength, the elongation of the adhesive bond, the impact strength and hardness). The results confirm the assumption about the different behaviour of one-component epoxy. An important part of the experiment was to evaluate the influence of the surface treatment on the bond strength. From the result of experiments it can be concluded that the adhesive SP492 (p = 0.1898) and B5103-3 (p = 0.4263) are resistant to different types of tested treatment of the bonding surface.
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Sedlmair, Roman, and Lothar Stempniewski. "CFRP Strengthening of RC tensile members with stiff and soft adhesives." In IABSE Symposium, Guimarães 2019: Towards a Resilient Built Environment Risk and Asset Management. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/guimaraes.2019.0369.
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<p>Single lap shear tests with externally bonded carbon fibre reinforced polymers (CFRP) laminates are carried out to examine the effect of differing adhesives on the load-slip behaviour. Displacement of the surface are measured with digital image correlation (DIC) to establish the cohesive material response for the interface. Due to the changed material properties (softer adhesive) larger effective bond lengths (from the textile to concrete) are examined. The determined cohesive laws are implemented in a numerical simulation of externally strengthened reinforced concrete (RC) tensile members to show the potential usability of softer adhesives for the strengthening technique. A change in the overall behaviour of strengthened systems and a more compatible system (plain strain distribution) could be in sight.</p>
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Liao, Lijuan, Toshiyuki Sawa, and Chenguang Huang. "Analysis on Failure Mechanism of Scarf Joints With Brittle-Ductile Adhesives Subjected to Uniaxial Tensile Loads." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-62854.
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The failure mechanism of scarf joints with a series of angles and brittle-ductile adhesives subjected to uniaxial tensile loads is analyzed by using a numerical method which employs a cohesive zone model (CZM) with a bilinear shape in mixed-mode (mode I and II). The adopted methodology is validated via comparisons between the present simulated results and the existing experimental measurements, which illustrate that the load-bearing capacity increases as the scarf angle decreases. More important, it is observed that the failure of the joint is governed by not only the ultimate tensile loads, but also the applied tensile displacement until complete failure, which is related to the brittle-ductile properties of the adhesive layer. In addition, failure energy, which is defined by using the area of the load-displacement curve of the joint, is adopted to estimate the joint strength. Subsequently, the numerical results show that the strength of the joint adopting ductile adhesive with higher failure energy is higher than that of the joint using brittle adhesive with lower failure energy.
Reports on the topic "Adhesive tensile"
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Robinson, W., Jesse Doyle, and James Harrison. Laboratory tensile performance of joint adhesive for asphalt pavements. Engineer Research and Development Center (U.S.), April 2019. http://dx.doi.org/10.21079/11681/32546.
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Lovell, Alexis, Garrett Hoch, Christopher Donnelly, Jordan Hodge, Robert Haehnel, and Emily Asenath-Smith. Shear and tensile delamination of ice from surfaces : The Ice Adhesion Peel Test (IAPT). Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/41781.
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For decades, researchers have sought to understand the adhesion of ice to surfaces so that low-cost ice mitigation strategies can be developed. Presently, the field of ice adhesion is still without formal standards for performing ice adhesion tests. The U.S. Army Corps Engineers’ Research and Development Center’s Cold Regions Research and Engineering Laboratory (ERDC-CRREL) has a longstanding history as an independent third party for ice adhesion testing services. Most notably, CRREL’s Zero-Degree Cone Test (ZDCT) has been an industry favorite for more than 30 years. Despite its wide acceptance, the ZDCT contains some shortcomings, namely that freshwater ice is formed on the surface of interest within the confines of an annular gap. To address this limitation, CRREL developed and uses the Ice Adhesion Peel Test (IAPT) for testing ice adhesion. This test employs an open planar substrate from which the ice can be removed under either tensile or shear loading, thereby allowing ice to be grown directly on the target substrate without the use of molds. The IAPT configuration is therefore amenable to different ice types and geometries and will provide utility to research studies that aim to develop surface treatments to mitigate ice in a wide range of environments. This report describes the IAPT and its use for characterizing the ice adhesion properties of materials.
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Struble, L., and N. Waters. Tensile test to measure adhesion between old and new cement paste. Gaithersburg, MD: National Bureau of Standards, 1988. http://dx.doi.org/10.6028/nbs.ir.87-3685.
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