Academic literature on the topic 'Compressive properties'

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Journal articles on the topic "Compressive properties"

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Lv, Qing Fang, Ji Hong Qin, and Ran Zhu. "Size Effect on Mechanical Properties of LVL." Advanced Materials Research 887-888 (February 2014): 824–29. http://dx.doi.org/10.4028/www.scientific.net/amr.887-888.824.

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Laminated veneer lumber is taken as an object of study, and use LVL specimens of different sizes for compression test and tensile test. The goal of the experiment is to investigate the size effect on compressive strength and tensile strength as well as the influence of the secondary glued laminated face, which appears in the secondary molding processes. The results show that both compressive strength and tensile strength have the size effect apparently and the existence of the secondary glued laminated face lower the compressive strength of LVL specimens. Afterwards, the relationship between compressive strength and volume along with tensile strength and area are obtained by the test results.
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Su, Yi Ming, Ying Hou, and Guang Ping Zou. "Research on Compression Mechanical Properties of Metal-Net Rubber." Applied Mechanics and Materials 858 (November 2016): 179–83. http://dx.doi.org/10.4028/www.scientific.net/amm.858.179.

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For the study of the metal-rubber which is a new material used as damper component. The compression mechanical properties of metal-net rubber were studied. Through the static compression test of metal-net rubber, the influence of some factors such as: compression amount, relative density, wire diameter and bearing area. The method is variable-controlling. Experimental results show that along with the increase of the amount of compression, the nonlinear mechanical properties of metal-net rubber boosts; with the increase of relative density, the compressive capacity of metal-net rubber improves. The wire diameter influences the nonlinear mechanical properties of metal-net rubber, the larger the wire diameter, the compressive capacity is higher; the bearing area is greater, the compressive capacity and energy dissipation performance are better.
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Ma, Yong Sheng, Cheng Sun, Xin Ni Mu, and Xin Li. "The Simulation Research of In-Plane Static Compression Properties of Honeycomb Paperboard Based on FEA." Advanced Materials Research 631-632 (January 2013): 1061–67. http://dx.doi.org/10.4028/www.scientific.net/amr.631-632.1061.

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The in-plane mechanical properties of honeycomb paperboard were analyzed and simulated by ANSYS software with finite element analysis method. This paper also explored and optimized finite element modeling method of honeycomb paperboard structure and obtained the equivalent stress distribution maps of honeycomb paperboard in different displacement loads. The mechanical properties and deformation mode of the honeycomb paperboard in the in-plane compression conditions were also analyzed. The results show that longitudinal compressive strength is greater than the lateral compressive strength. The compression deformation mode is different when compressing but appears with the same four stages. The results of finite element analysis have good equivalence with the experimental ones. This paper also revealed the honeycomb paperboard in-plane mechanical properties, deformation and destruction mechanism, further extended the research scope of honeycomb paperboard, and promoted the application of finite element method in the analysis of honeycomb paperboard.
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Zhang, Xiaohui, Chao Zhang, and Pibo Ma. "Mechanical properties of hollow polyester monofilament: Compression and tension behaviors." Journal of Engineered Fibers and Fabrics 14 (January 2019): 155892501983753. http://dx.doi.org/10.1177/1558925019837537.

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Comparative analysis has been performed on the mechanical properties of hollow and solid polyester monofilament with identical external diameter. Tensile test of hollow polyester monofilament was conducted to study the influence of hollow core and the manufacturing method on the tensile fracture mechanism of hollow monofilament. The compressive properties of hollow monofilament were determined to provide a bundle-compression method to study the behavior of hollow polyester monofilament under axial compressive loading and compare with solid one. The results show that the tensile property of the hollow monofilament has smaller breaking force and higher breaking elongation than solid monofilament in case of identical external diameter. Under compression loading, the solid monofilament show better compressive properties than hollow one with identical diameter. The hollow core only affects the values of compressive strain and stress, but it has no effect on the compression and deformation mechanism. The study results also show that the polyester monofilament can show better mechanical properties than the solid polyester monofilament for the same weight. This study can help to design the lighter textile materials with the hollow polyester monofilament.
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Huo, Fu Lei, Guo Li Zhang, Jia Lu Li, Guang Wei Chen, and Li Chen. "Study on the Compression Properties of Epoxy Matrix Composites Reinforced by PES Warp-Knitted Spacer Fabric." Advanced Materials Research 217-218 (March 2011): 1208–11. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.1208.

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This research paper presents an experimental investigation on the compression and compressive resilience properties of warp-knitted spacer fabric composites with different resin content and different kinds of resin. By means of hand roller coating technology, four kinds of warp-knitted spacer fabric composites were made. The experiments were tested according to GB/T1453-2005 and ISO3386/2:1984. It is shown that the resin content and resin type seriously affect the compression and compressive resilience properties of warp-knitted spacer fabric composite. The data indicated that when the warp-knitted spacer fabric composite coated with the same kind of resin, with increasing resin content the elastic modulus added and the compressive resilience decreased. Having the same resin content, the compression properties of pacer fabric composite increase with the increase of flexural strength of resin; while the compressive resilience decrease.
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Fartini, M. S., M. S. Abdul Majid, Mohd Afendi, R. Daud, and Azizul Mohamad. "Effect of Nano-Clay and their Dispersion Techniques on Compressive Properties of Unsaturated Polyester Resin." Applied Mechanics and Materials 554 (June 2014): 27–31. http://dx.doi.org/10.4028/www.scientific.net/amm.554.27.

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This paper aims to understand the relationship between processing parameters and compressive properties of nanoclay filled polyester resin (dispersion method and wt% of nanoclay particles). Unsaturated polyester resin with 0-5 wt% nanoclay content was prepared by hand mixing and through shears mixing of water bath shaker. Static uniaxial compression tests were conducted to investigate how the unsaturated polyester resins with nanoclay contents and processing will effect on the compressive stress-strain behaviour and compression properties. The experimental results show that the compressive strength and elastic modulus of nanomodified resin are significantly affected by type of mixing methods to prepare the specimens and the ratio of nanoparticles content during mixing. It was found out that the compressive strength and compressive modulus increase with the nanoclay content. The findings also indicate the dispersion of nanoclay by hand-mixed method yield higher compressive strength compared to that dispersed by water shaker bath.
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Wang, Dong Mei. "Compressive Constitutive Relation for Multi-Layer Corrugated Boards." Applied Mechanics and Materials 80-81 (July 2011): 365–69. http://dx.doi.org/10.4028/www.scientific.net/amm.80-81.365.

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The investigation into the cushioning properties of multi-layer corrugated boards is a hotspot issue in the packaging field. People one after another investigate into the compressive properties based on experiments. As far as authors' knowledge is concerned, no theoretical research on compressive constitutive relation for multi-layer corrugated boards has ever been reported in literature. Therefore, we investigated into the compressive properties of multi-layer corrugated boards and analyzed their compressive breakage mechanism. The compression curve of multi-layer corrugated boards presents the three sections of linear elasticity, sub-buckling going with local collapse and densification. We constructed the compressive constitutive equation by a subsection function. The equation is standardized by the solid modulus Es of corrugated sandwich materials. Focusing on the structure characteristics, it can express the compression resistance and cushioning properties in the same curve for different basis materials. Comparison between the theory and experiments shows that a good consistency is achieved between theoretical and experimental stress-strain curves. By means of the compressive constitutive equation, the compression resistance and cushioning properties can be evaluated without more experiments, which facilitates the optimization of the structure of the corrugated sandwich structure and the optimized design of the cushioning package.
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Sun, Ji Shu, Li Jie Ma, Yuan Ming Dou, and Ji Zhou. "Effect of Strain Rate on the Compressive Mechanical Properties of Concrete." Advanced Materials Research 450-451 (January 2012): 244–47. http://dx.doi.org/10.4028/www.scientific.net/amr.450-451.244.

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Concrete is one of the most widely used construction material throughout the world. But the properties of concrete under different strain rates differ from each other greatly. In order to investigate the effect of strain rate on concrete compressive mechanical properties, compressive experiments of concrete specimens (C35) are carried out on MTS, with the uniaxial strain rates ranging from 10-5/s to 10-2/s. The compressive mechanical properties of concrete under different stain rates, which include compressive strength, elastic modulus, peak strain and Poisson's ratio are studied systematically. The formulas which can describe the change laws of the compressive properties of concrete under different the strain rates are proposed. The test results show that the compresseive strength and elastic modulus of concrete would increase with the strain rate increasing. The effect of strain rate on peak strain and and Poisson's ratio is not significant. These research achievements can contribute to grasp the dynamic properties and build the dynamic constitutive models of concrete.
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Yao, Jia Wei, Yu Pu Song, Li Kun Qin, and Ling Xia Gao. "Mechanical Properties and Failure Criteria of Concrete under Biaxial Tension and Compression." Advanced Materials Research 261-263 (May 2011): 252–55. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.252.

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Utilizing the large static-dynamic triaxial test system, 7 proportional loading biaxial tensile and compressive tests of concrete were conducted. The proportional loading paths are 0 (uniaxial compression), -0.05, -0.1, -0.15, -0.2, -0.25 and ∞ (uniaxial tension). Compressive and tensile strength were measured as well as the strains at two loading directions. Considering the ratio to tension and compression, failure criteria of ordinary concrete under biaxial tension and compression was established, which has a good agreement with test value.
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Jumahat, A., C. Soutis, F. R. Jones, and A. Hodzic. "Improved Compressive Properties of a Unidirectional Cfrp Laminate Using Nanosilica Particles." Advanced Composites Letters 19, no. 6 (November 2010): 096369351001900. http://dx.doi.org/10.1177/096369351001900604.

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The effect of nanosilica particles on the compressive properties of a unidirectional (UD) HTS40/828 carbon fibre reinforced polymer (CFRP) composite was studied. A series of nanomodified CFRP composite was fabricated using 3.6-19.7 vol.% nanosilica-modified epoxy resin. Static uniaxial compression tests were conducted on [0]8 laminate specimens of 12 mm gauge length to evaluate the compressive properties. It was found that the compressive modulus and strength of nanomodified UD system were improved with increasing nanosilica content without any significant reduction in failure strain. The presence of spherical silica nanoparticles stiffened the epoxy matrix and offered a better lateral support to the carbon fibre. Therefore, the compressive properties were improved significantly in comparison with the unmodified CFRP system. These results suggested that the interaction between the nanomodified epoxy and the carbon fibre is very good therefore the load is successfully transferred via the interface to give higher resistance against deformation when it was loaded in compression.
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Dissertations / Theses on the topic "Compressive properties"

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SALAMI, MOHAMMAD REZA. "CONSTITUTIVE MODELLING OF CONCRETE AND ROCKS UNDER MULTIAXIAL COMPRESSIVE LOADINGS." Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/184202.

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Characterization of stress-deformation behavior of concrete and rocks have been a subject of active research for a long time. Linear elastic, nonlinear (piecewise) linear elastic, elastic-plastic and endochronic models have been proposed and used by various investigators and the literature on the subjects is very wide. A review of various models together with their implementation is numerical (finite element) procedures is presented in Ref. (77). The primary objective of the present study is to develop a generalized constitutive model based on the theory of plasticity. Although such a model can be used for a wide range of materials, in this dissertation its applications to plain concrete and rocks are emphasised. One of the main objectives of this dissertation is to study constitutive behavior of concrete and soapstone under multiaxial load histories by using a truly triaxial or multiaxial testing device. The truly triaxial device is capable of applying a general three-dimensional state of stress. Samples can be tested along any three dimensional stress path. Therefore, constitutive behavior of concrete and soapstone can be studied under all possible states of stress. The conventional, octahedral, proportional loading and circular stress test series are conducted using the truly triaxial cubical device. For meaningful results, samples with consistent initial properties are essential. In order to produce samples with uniform initial properties such as density, equipment and procedures are developed to standardize the sample preparation process. The test data is used to determine the material constants associated with the proposed constitutive model. The model is then verified by back-predicting the stress-strain curves obtained from the laboratory.
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Thotakuri, Manoj Varma. "Transverse compressive properties of honeycomb core under oblique loading." Thesis, Wichita State University, 2007. http://hdl.handle.net/10057/1558.

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The transverse compressive behavior of honeycomb cores has been widely exploited for energy absorption applications in the automotive and aerospace industry. The energy absorption in honeycomb cores with thin reinforced thermoplastic/thermoset cell walls is achieved by progressive folding/fracture of cell walls. The energy absorption by honeycomb cores has been assumed to be primarily due to loading along thickness direction. However, inclined loads cannot be precluded and their influence on energy absorption process must be measured. In this investigation, the effects of inclined/oblique loads on the compressive behavior and energy absorption of Plascore Nomex honeycomb core has been investigated experimentally under static and dynamic loading. The load inclination to the cell wall direction was varied by using off-axis core specimens. The effect of loading angle, core thickness and test speed on the resulting energy absorption has been studied. Test specimens with varying thicknesses of 0.5˝, 1˝, 1.5˝ and 2˝, with cell walls oriented at 0º, 5º, 15º, 30º and 45º to the loading axis were used in the study. These specimens are tested using a servo hydraulic testing machine at rates of 0.008333, 10-1, 1 and 10 in/s. It was observed that the initial load peak in the compression response, the sustained crushing load and energy absorption was influenced by the cell-wall orientation, core thickness and the test speed.
Thesis (M.S)--Wichita State University, College of Engineering, Dept. of Aerospace Engineering
"December 2007."
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Thotakuri, Manoj Varma Raju K. Suresh. "Transverse compressive properties of honeycomb core under oblique loading /." Thesis, A link to full text of this thesis in SOAR, 2007. http://hdl.handle.net/10057/1558.

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Whitley, Karen Suzanne. "Tensile and Compressive Mechanical Behavior of IM7/PETI-5 at Cryogenic Temperatures." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/35944.

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In order for future space transportation vehicles to be considered economically viable, the extensive use of lightweight materials is critical. For spacecraft with liquid fueled rocket engines, one area identified as a potential source for significant weight reduction is the replacement of traditional metallic cryogenic fuel tanks with newer designs based on polymer matrix composites. For long-term applications such as those dictated by manned, reusable launch vehicles, an efficient cryo-tank design must ensure a safe and reliable operating environment. To execute this design, extensive experimental data must be collected on the lifetime durability of PMC's subjected to realistic thermal and mechanical environments. However, since polymer matrix composites (PMC's) have seen limited use as structural materials in the extreme environment of cryogenic tanks, the available literature provides few sources of experimental data on the strength, stiffness, and durability of PMC's operating at cryogenic temperatures.

It is recognized that a broad spectrum of factors influence the mechanical properties of PMC's including material selection, composite fabrication and handling, aging or preconditioning, specimen preparation, laminate ply lay-up, and test procedures. It is the intent of this thesis to investigate and report performance of PMC's in cryogenic environments by providing analysis of results from experimental data developed from a series of thermal/mechanical tests. The selected test conditions represented a range of exposure times, loads and temperatures similar to those experienced during the lifetime of a cryogenic, hydrogen fuel tank. Fundamental, lamina-level material properties along with properties of typical design laminates were measured, analyzed, and correlated against test environments. Material stiffness, strength, and damage, will be given as a function of both cryogenic test temperatures and pre-test cryogenic aging conditions.

This study focused on test temperature, preconditioning methods, and laminate configuration as the primary test variables. The material used in the study, (IM7/PETI-5), is an advanced carbon fiber, thermoplastic polyimide composite.
Master of Science
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Hagman, Anton. "Influence of inhomogeneities on the tensile and compressive mechanical properties of paperboard." Doctoral thesis, KTH, Hållfasthetslära (Avd.), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-185917.

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The in-plane properties of paperboard have always been of interest to paper scientists. Tensile properties are crucial when the board is fed through converting machines at high speeds. Compressive properties are essential in the later use. Inhomogeneities affect both the compressive and tensile properties. For the tensile properties, it is the inherent heterogeneity of the paperboard that might cause problems for the board-maker. Varying material properties, through the thickness of the paperboard, are on the other hand used to achieve high bending stiffness with low fiber usage. It is of interest to know how this practice affects the local compressive properties. Papers A and B aims to address this, while C, D and E focus on in-plane heterogeneities. Paper A investigates the mechanism that causes failure in the short span compression test (SCT). It was concluded that the main mechanism for failure in SCT is delamination due to shear damage. In paper B the effect of the through-thickness profiles on the local compression strength was examined. It was concluded that the local compression is governed by in-plane stiffness and through thickness delamination. The latter was in turn dependent on the local shear strength and in-plane stiffness gradients. In paper C the tensile test is investigated with focus on sample size and strain distributions. The strain behavior was dependent on the length to width ratio of the sample and was caused by activation of local zones with high strainability. Paper D focuses on the strain zones seen in C. The thermal response in paper was studied. It was observed that an inhomogeneous deformation pattern arose in the paper samples during tensile testing. It was concluded that the heat patterns observed coincided with the deformation patterns. It could be shown that the formation was the cause of the inhomogeneous deformation. In final paper, E, the virtual field method was applied on data from C.
Egenskaperna hos ett kartongark kan grovt delas upp i två kategorier: i-planet egenskaper och ut-ur-planet egenskaper. I-planet egenskaperna har länge varit ett område som pappersmekanister och andra pappersforskare visat intresse för. Anledningen till detta är att de är avgörande för hur väl det går att konvertera kartongen till färdiga förpackningar, samt hur väl de förpackningarna klarar sin uppgift. Dragegenskaperna prövas när kartongen dras genom tryck- och konverteringsmaskiner i hög hastighet. Tryckegenskaperna spelar stor roll för hur väl en förpackning klarar att staplas och hålla sitt innehåll intakt. Inhomogeniteter påverkar både drag och tryckegenskaper. Papprets naturliga variation påverkar dragegenskaperna hos kartongen och kan orsaka problem för kartongmakarna. Särskilt när utvecklingen går mot mer avancerade kartong utseenden. Å andra sidan så använder sig kartongmakare flitigt av egenskapsvariationer genom tjockleken på kartongen, när dom vill åstadkomma böjstyva kartonger utan att slösa med fibrer. I detta fall är det intressant att veta hur de lokala kompressionsegenskaperna påverkas av kartongens ut-ur-planet profil. Det första två uppsatserna i denna avhandling, A och B, handlar om just detta. Uppsatserna C, D och E avhandlar hur i-planet variationer påverkar kartongens egenskaper. I Artikel A undersöks vilka skademekanismer som aktiveras under ett kortspannskompressionstest (SCT). Tre flerskiktskartonger undersöktes. De hade valts så att de hade distinkt olika skjuvstyrkeprofiler. Kartongerna karakteriserades och datan användes som materialdata i en finit element modell av SCT-testet. Modellen bestod av skikt, betraktade som kontinuum, mellan vilka det fanns kohesiva ytor. Huvudmekanismen i SCT var att kartongen delaminerade på grund av skjuvskador. Den andra uppsatsen, Artikel B, var en fortsättning på den första. Denna gång undersöktes fem flerskiktskartonger framtagna så att de hade olika skjuvstyrka beroende på positionen i tjockleksled. Det konstaterades att kompressionsegenskaperna lokalt styrs av skjuvstyrkeprofilen och styvhetsgradienter. Vidare konstaterades det att mekanismerna innan kartongen delaminerar är, i huvudsak, elastiska. Den tredje artikeln, Artikel C, fokuserade på hur dragprov på kartong påverkas av provstorleken och töjningsvariationen. Tre olika flerskiktskartonger användes som provmaterial och provbitar med olika storlek analyserades. Förutom dragprov så användes digital image correlation (DIC) för analysen. Det visade sig att den globala töjbarheten varierade med storleken på provet beroende på kvoten mellan längd och bredd. DIC visade att detta i sin tur berodde på att zoner med hög töjbarhet aktiverades i provet. Dessa zoner hade samma storlek oberoende av provstorlek och påverkade därför den totala töjbarheten olika mycket. Artikel D undersöker töjningszonerna som sågs i Artikel C samt hur de påverkas av kreppning. Vidare undersöktes pappersproverna med hjälp av termografi. Termografin visade att varma zoner uppstod i proven när det töjdes. Zonerna blev synliga när provet töjdes plastiskt. Termografi kördes parallellt med DIC på några prover. Det visade sig att de varma zonerna överenstämde med zoner med hög lokal töjning. Vidare kunde det visas att dessa zoner övenstämde med papperets mikrostruktur, formationen. En finit element analys av hur papper med olika formation töjs gjordes. Delar av provningen gjordes på kreppade papper som har högre töjbarhet. Det visades sig att någon form av skada hade överlagrats på papprets mikrostruktur under kreppningen, och att den deformationen återtogs när pappret töjdes. I den sista artikeln, Artikel E, behandlas hur VFM (Virtual Field Method) kan användas på DIC-data från kartong. DIC-datan som användes hämtades från Artikel C. Detta gjordes för att visa på hur olika VFM-formuleringar kan användas för att karakterisera styvhetsvariationen hos kartong. Provet delades upp i tre subregioner baserat på den axiella töjningsgraden. VFM-analysen visade att dessa subregioners styvhet och tvärkontraktionstal sjönk monotont, men att skillnaden mellan regionerna ökade med ökande spänning. även om endast ett prov undersöktes, så indikerade resultaten att områden med hög styvhet endast förbättrar de mekaniska egenskaperna marginellt. Analysen visade också att även om subregionerna inte är sammanhängande, så har dom liknande mekaniska egenskaper.

QC 20160429

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Haas, Caroline Marie Burrell. "Effect of Massage-Like Compressive Loading on Muscle Mechanical Properties." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1343714522.

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Rickles, Stacey A. "Microstructural and compressive properties of a metal/ceramic syntactic foam." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/19677.

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Schwarz, Chaid Daniel. "Modeling of the radial compressive properties of an aortic stent graft." Thesis, University of Iowa, 2012. https://ir.uiowa.edu/etd/3533.

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Abdominal aortic aneurysms are a focal dilation of the aorta which can be potentially life threatening if left untreated. Endovascular aneurysm repair (EVAR) is a noninvasive treatment that can reduce the mortality rate when compared to the standard open repair. Yet, EVAR is associated with other complications that can arise such as migration, endoleaks, or device related failures. These complications drive the need for reinterventions which have been shown to occur more frequently with EVAR than with open repair. The long term fixation and sealing characteristics of these devices is likely related to the nature of its apposition to the aortic wall. Currently there is little understanding of these mechanics and factors in how the device performs at the time of deployment. A computational model that reflects the compressive nature of an endovascular graft is beneficial in investigating these mechanics. The aims of the study are; 1) formulate an experimental methodology that captures the radial compressive nature of the stent graft, 2) develop a parameterized finite element model of the stent structure, and 3) compare the compressive behavior this model against the acquired experimental data. A 2 mil polyethylene sleeve was used to transfer a compressive vacuum pressure from the sleeve onto 10 independent stent grafts. The loading-unloading pressure was cycled from 0 to -50 mmHg (complete collapse) over 5 minutes. A pressure transducer and optical micrometer were used to capture the vacuum pressure and diameter relationship. All ten grafts compressed in a similar elliptical shape configuration. Commercial software was leveraged to construct a parameterized model of the stent geometry. All crest and trough vertex locations of the sinusoidal stent structure were validated within 1 mm of a measured value. A dynamic quasi-static computational simulation was completed that included large deformations and contact between the sleeve and stent as well as self-contact in the sleeve. Our results show that the model is representative of the experiments and can be used to interrogate how a stent graft will perform during certain stages of deployment and immediately after deployment with some caution in regard to the stated limitations.
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Ståhlberg, Daniel. "Thermoset polymers and coatings subjected to high compressive loads." Doctoral thesis, KTH, Fiber- och polymerteknik, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4091.

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This study describes the mechanical response of thermoset polymers under high compressive loads. The study is divided into two parts. The first part focuses on the behaviour of a powder coating when used in a clamping force joint and how the properties vary when the chemical and physical structure of the coating is changed. The second part discusses the fundamental understanding of the behaviour of thermoset polymers with small thickness-to-width ratio subjected to compressive stresses, the aim being to develop mathematical material models for viscoelastic materials under high compressive loads. In the first part polyester powder coatings were used with variations in molecular weight, number of functional groups of the resin, amount and type of filler and thickness of the coating. The coatings were subjected to conventional tests for coatings and polymers and also to specially designed tests developed to study the behaviour of powder coatings in clamping force joints. The high compressive loads in a clamping force joint put high demands on the relaxation and creep resistance of the coating and the study shows the importance of crosslink density, filler content, and also coating thickness in order to achieve the desired mechanical properties of a coating. A high reactivity of the resin, facilitating a high crosslink density and hence a high Tg, is the most important property of the coating. A film with high crosslink density shows increase in relaxation time and in apparent yield strength under compression, and also an increase in relaxation modulus and storage modulus in tension at temperatures above Tg. Addition of fillers reduces the deformation during compression and tension, but also induces a lower strain at break and hence a more brittle coating. The reinforcing effect of the fillers is pronounced when increasing the crosslink density of the coating, especially in the compression tests. The effect is evident in compression even at low amounts of fillers, where the relaxation time and resistance to deformation are strongly increased. The combination of high crosslink density and addition of fillers is therefore desirable since fillers then can be used moderately in order to achieve a reinforcing effect in compression while minimising embrittlement. The study also showed that increased coating thickness will give rise to defects in the coating, especially voids and blisters due to evaporation of water formed during the curing of the polyester powder coating. These defects will give rise to stress concentrations and increased plastic deformations in the coating, impairing the properties of the clamping force joint. The results from relaxation tests in tension were used to create a micromechanical model. This model was used in finite element modelling to estimate the loss of clamping force in a screw joint and to correlate with the experimental results of the powder coatings. In the second part of the study a well-defined free radically cured vinyl ester resin was used and studied in six different geometries in order to determine the dependence of apparent mechanical properties on the particular size and shape of a sample when it is subjected to high compressive loads. Variation of the specimen thickness, boundary conditions and loading conditions reveals that the geometry of the sample has a significant effect on the mechanical performance of the polymer. The apparent modulus and the yield strength increase dramatically when the thickness-to-width ratio of the sample is reduced, whereas they decrease when the friction between the sample and the compression plate is reduced. The creep strain rate decreases when the thickness of the material is reduced and it decreases even more when the amount of material surrounding the compressed part of the sample is increased. Creep and strain recovery tests on large specimens were used to develop a mathematical model including non-linear viscoelastic and viscoplastic response of a thermoset vinyl ester. The model was used in FEM calculations where the experimental results were compared with the calculated results in order to model the trends of the material response when varying the sample geometry.
QC 20100921
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Farah, Raoaa. "Correlations Between Index Properties and Unconfined Compressive Strength of Weathered Ocala Limestone." UNF Digital Commons, 2011. http://digitalcommons.unf.edu/etd/142.

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Weathering has a negative effect on both physical and engineering properties of rock specimens and rock masses. When rock masses are weathered it is often difficult to obtain core segments that are the correct size for unconfined compressive strength testing. Thus engineers must use index testing to estimate the strength of specimens for design purposes. This thesis relates the unconfined compressive strength to index strength tests of Ocala limestone. The relationships developed include weathering states of the specimens and proximity of unconfined compressive strength specimens to index specimens. One hundred and ninety five specimens were classified using International Society for Rock Mechanics (ISRM) weathering designations, had their unit weight determined, and were tested under unconfined compression, point load, or indirect tensile conditions. Qualitative results show the average unit weight decreases with an increase in weathering state and the range of index strength values decreases with an increase in weathering state. The data also shows low index strength test results across a wide range of unit weights. Quantitative relationships were also developed with the strength data. All of the developed relationships were linear. Point load strengths have better correlations with unit weight than indirect tensile strengths. Unconfined compressive strength was correlated to index strength and weathering using three different approaches. For all approaches, indirect tensile strength has a better correlation with unconfined compressive strength than point load strength. Specimen pairs from the same weathering state also have a better correlation than specimen pairs from different weathering states. Unconfined compressive strength was also correlated to index strength results by incorporating specimen proximity. Once again, indirect tensile strength is a better predictor of unconfined compressive strength than point load strength. Specimen pairs, consisting of unconfined compressive strength and index strength test specimens, had better correlations when the two specimens are located close together.
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Books on the topic "Compressive properties"

1

Whittenberger, J. Daniel. 1200 K compressive properties of N-containing NiAl. [Washington, D.C: National Aeronautics and Space Administration, 1995.

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Mrse, Anthony Michael. Effects of fibre misalignment on compressive properties of advanced thermoplastic composites. Ottawa: National Library of Canada = Bibliothèque nationale du Canada, 1991.

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Carr, Debra Julie. The influence of matrix properties on the compressive strength of CFRP [carbon fibre reinforced plastics]. Birmingham: University of Birmingham, 1994.

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Rubinstein, Robert. Transport coefficients in weakly compressible turbulence. Hampton, Va: National Aeronautics Space Administration, Langley Research Center, 1996.

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Timell, T. E. Bibliography, historical background, determination, structure, chemistry, topochemistry, physical properties, origin, and formation of compression wood. Berlin: Springer-Verlag, 1986.

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James, Palmer. Compressible flow tables for engineers: With appropriate computer programs, for estimating property changes caused by friction heat transfer and/or shock waves. Basingstoke: Macmillan Education, 1987.

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E, Ingham P., Aitken B. L, and Wool Research Organisation of New Zealand., eds. The effect of lubricants on the bulk, compression properties, and drape of wool batting. Christchurch: Wronz, 1986.

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Bakis, Charles E. Fatigue response of notched laminates subjected to tension-compression cyclic loads. Blacksburg, Va: Virginia Polytechnic Institute and State University, 1986.

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Witte, David W. Computer code for determination of thermally perfect gas properties. Hampton: National Aeronautics and Space Administration, Langley Research Center, 1994.

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Rubinstein, Robert. Transport coefficients in rotating weakly compressible turbulence: Under contracts NAS1-19480 & NAS1-97046. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1998.

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Book chapters on the topic "Compressive properties"

1

Gupta, Nikhil, Dinesh Pinisetty, and Vasanth Chakravarthy Shunmugasamy. "Compressive Properties." In Reinforced Polymer Matrix Syntactic Foams, 43–52. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-01243-8_6.

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Cervenka, V., and P. Bouska. "Automated Testing of Concrete Compressive Properties." In Experimental Stress Analysis, 11–20. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4416-9_2.

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Fang, Qin, Hao Wu, and Xiangzhen Kong. "Dynamic Compressive Mechanical Properties of UHPCC." In UHPCC Under Impact and Blast, 31–54. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6842-2_2.

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Hellstén, Niko, Antti J. Karttunen, Charlotta Engblom, Alexander Reznichenko, and Erika Rantala. "Compressive Properties of Micro-spherical SiO2 Particles." In Advances in Powder and Ceramic Materials Science, 57–66. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36552-3_6.

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Zhang, Qiu Ming, Xiao Dong He, and Yao Li. "Compressive Properties of Quartzite Microcrystallite Glass Ceramics." In Key Engineering Materials, 469–72. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-456-1.469.

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Hur, Bo Young, Bu Keoun Park, Sang Youl Kim, and Hoon Bae. "Compressive Properties of Open Cell Aluminum Foams." In Materials Science Forum, 472–75. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-966-0.472.

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Amin, Heet, Jianshen Wang, Ali A. H. Ameri, Hongxu Wang, Daniel East, and Juan P. Escobedo-Diaz. "Compressive Properties of Additively Manufactured Titanium-Carbide." In Characterization of Minerals, Metals, and Materials 2021, 297–307. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-65493-1_29.

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Markley, F. W., J. A. Hoffman, and D. P. Muniz. "Cryogenic Compressive Properties of Basic Epoxy Resin Systems." In Advances in Cryogenic Engineering Materials, 119–26. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4613-9871-4_14.

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Michiels, S., and J. F. Harper. "The Compressive Properties of Glass/Carbon Laminated Composites." In Composite Structures, 799–809. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3662-4_59.

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Ollivier, Jean-Pierre, Myriam Massat, and Marie-Pierre Yssorche. "Relationships Between Transport Properties and Compressive Strength of Concrete." In The Modelling of Microstructure and its Potential for Studying Transport Properties and Durability, 313–23. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-015-8646-7_15.

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Conference papers on the topic "Compressive properties"

1

Suda, Mitsunori, Jiahui Yang, Takanori Kitamura, Kanta Ito, Kenji Wada, Zhiyuan Zhang, Yuqiu Yang, and Hiroyuki Hamada. "Lateral Compressive Properties of Paper Tube." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37923.

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Recycled paper is helpful to reduce trash discharge, save resource and cost. Tube is one of the most common structures of recycled paper in application. It is an excellent choice for packing. It’s also used in the construction of temporary structures for both exhibition spaces or for rapid-recovery shelters in emergency operations. As paper tubes are laminated by paperboards which are inherent anisotropy materials, the researches on mechanical property and fracture behavior became complicated. In the current study, paperboards used for paper tubes were tested on universal testing machine to investigate their basis mechanical properties. Then, paper tubes fabricated with different kinds of paperboard and number of ply were used to investigate lateral compressive properties by Instron universal testing machine. And, a camera was employed to record the fracture process of paper tube during compression process. The fracture mechanism of paper tubes were discussed and analyzed during compressed process based on the load-displacement curves and detailed observation. Additionally, ls-dyna software was used to conduct numerical simulation and analyze stress distribution of paper tube during lateral compression.
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Lateju, Omotinuola S., Modupe A. Onitiri, and Esther T. Akinlabi. "Compressive Properties of Post Cured Talc/Fiber Glass Filled Epoxy Composites." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71448.

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The inclusion of fillers in conventional materials has been found to have significant effect on the various properties of the parent materials. In this present work, epoxy composite was fabricated using talc and fiber glass as fillers varying the particle size and loading while the composites were then post cured at temperatures of 50°C, 75°C, 100°C, 125°C and 150°C. The compressive behavior of the composites was then quantified by conducting compression tests in a controlled environment using specimens of simple geometry. It was discovered that compressive property increased with increase in post cure temperature and particle size and a decrease with increase in filler content.
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Liu, Yue, Weicheng Gao, Wei Liu, and Zhou Hua. "Numerical Analysis and Mechanical Properties of Nomex™ Honeycomb Core." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-72654.

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This paper presents an investigation on the mechanical response of the Nomex honeycomb core subjected to flatwise compressive loading. Thin plate elastic in-plane compressive buckling theory is used to analyze the Nomex honeycomb core cell wall. A mesoscopic finite element (FE) model of honeycomb sandwich structure with the Nomex honeycomb cell walls is established by employing ABAQUS/Explicit shell elements. The compressive strength and compressive stiffness of Nomex honeycomb core with different heights and thickness of cell walls, i.e. double cell walls and single cell walls, are analyzed numerically using the FE model. Flatwise compressive tests are also carried out on bare honeycomb cores to validate the numerical method. The results suggest that the compressive strength and compression stiffness are related to the geometric dimensions of the honeycomb core. The Nomex honeycomb core with a height of 6 mm has a higher strength than that of 8 mm. In addition, the honeycomb core with lower height possesses stronger anti-instability ability, including the compressive strength and stiffness. The proposed mesoscopic model can effectively simulate the crushing process of Nomex honeycomb core and accurately predict the strength and stiffness of honeycomb sandwich panels. Our work is instructive to the practical applications in engineering.
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Van Sligtenhorst, Caleb R., Duane S. Cronin, and G. Wayne Brodland. "High Strain Rate Compressive Properties of Soft Tissue." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-41258.

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High strain rate material properties and constitutive equations are essential for the development of numerical and physical models to assess the performance of soft materials subject to high rate deformation, with potential applications including protective equipment and vehicle crashworthiness. However, these properties are not available for many soft tissues. This is because specialized testing methods must be employed to obtain the necessary data. Fresh bovine tissue from the semimembranosis muscle was obtained and tested using a polymeric Split Hopkinson Pressure Bar. Samples were tested from 1.4 to 200 hours post mortem to observe the effect of rigor and other possible temporal effects on the material properties. Since this muscle had relatively uniform fiber orientation, it was possible to obtain specimens with fiber directions parallel, perpendicular, and at 45 degrees to the compression axis. The stress-strain curves for the muscle were concave upwards, as is typical of soft tissues at high strain rates. Fiber orientation was determined to have negligible effect at the tested strain rates. The testing revealed that the stiffness of the tissue increased with post mortem time until approximately 6 hours. At times greater than 200 hours post mortem, the tissue properties were found to be very similar to the properties of fresh tissue. These findings suggest that properties of fresh tissue might be estimated using more easily obtained post-rigor tissue.
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Schwarz, Chaid, and Madhavan L. Raghavan. "Radial Compressive Properties of an Aortic Stent Graft." In ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80889.

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The long-term fixation characteristics of stent grafts used to treat aortic aneurysms are likely related to the nature of its apposition to the aortic wall after deployment. But we only have a rudimentary understanding of the mechanisms involved and the factors that determine the nature of deployment of these implants. One factor that has been shown to be of particular relevance is oversizing — the % difference between the size of the graft to that of the aorta in which it is deployed (oversizing implies the former is larger) [1]. Other proposed factors include the angulation in the aortic neck and stent design. Naturally, issues of mechanics are central to this problem. Computational models of the mechanics involved, if developed with rigor, can be useful for gaining insights into the mechanisms involved and for interrogating the interactions among these multiple factors.
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Yu, Dianyou, Zhichao Xu, and Yingchun Liu. "Compressive properties of post-fire strain hardening cementitious composites." In ADVANCES IN ENERGY SCIENCE AND ENVIRONMENT ENGINEERING II: Proceedings of 2nd International Workshop on Advances in Energy Science and Environment Engineering (AESEE 2018). Author(s), 2018. http://dx.doi.org/10.1063/1.5029803.

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Suzuki, Nobuhisa, Joe Zhou, and Masao Toyoda. "Compressive Strain Limits of High-Strength Linepipes." In 2008 7th International Pipeline Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/ipc2008-64526.

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Regression formulas are developed in order to predict the critical compressive strain of X80 linepipes subjected to pure bending. The regression formulas were derived using an analytical solution and two conversion functions. The analytical solution was previously proposed to calculate the critical compressive strain of a pipe subjected to axial compression, where hardening properties are taken into account. The original analytical solution was rewritten to include a strain-hardening exponent. Two conversion functions are defined to connect two critical compressive strains of a pipe under different loading conditions. One is a pressure-effect conversion function which connects two critical compressive strains of a pipe without and with internal pressure, respectively. The other is a compression-bending conversion function which also connects two critical compressive strains of a pressurized pipe which is subjected to compression and bending. The regression formulas were obtained using the improved analytical solution and the two conversion functions. The regression formulas yield good agreement with FEA results especially for high-strain linepipes.
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Suhr, Jonghwan. "Visco-Elastic Properties of Aligned Multi-Walled Carbon Nanotube Blocks." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42611.

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Structural components subjected to cyclic stress can succumb to fatigue and fail at stress levels much lower than what is expected under static loading conditions. Such fatigue behavior in nanotube structures has never been reported, albeit its importance in practical devices incorporating nanotube components. In particular, cyclic compression loaded vertically aligned nanotube structures could find various applications as electro-mechanical systems. Here, this work reports the mechanical response from repeated high compressive strains on freestanding, long, vertically aligned multiwalled carbon nanotube membranes and show that the arrays of nanotubes under compression behave very similar to soft tissue and exhibit viscoelastic behavior. Under compressive cyclic loading, the mechanical response of nanotube blocks shows initial preconditioning, hysteresis characteristic of viscoeleastic materials, nonlinear elasticity, stress relaxation, and large deformations. Furthermore, no fatigue failure is observed even at high strain amplitudes up to half million cycles. The outstanding fatigue life and extraordinary soft tissue-like mechanical behavior suggest that properly engineered carbon nanotube structures could mimic artificial muscles, and their added high electrical and thermal conductivity could make excellent candidates for uses as compliant electrical contact brushes, probe cards and electromechanical systems.
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Krishnan, Ramaswamy, Monika Kopacz, Michael J. Carter, and Gerard A. Ateshian. "Strain Dependent Variations in the Frictional Properties of Bovine Articular Cartilage." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59275.

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This study investigates the hypothesis that the equilibrium friction coefficient of cartilage decreases with increasing compressive strain. Furthermore, when accounting for this strain-dependence, it is hypothesized that the temporal response of the friction coefficient correlates linearly with interstitial fluid load support, in the configuration of unconfined compression stress-relaxation. Both hypotheses were confirmed from theory and experiment.
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Giordano, Rossella, Pietro Guccione, Giuseppe Cifarelli, Luigi Mascolo, and Giovanni Nico. "Focusing SAR images by compressive sensing: Study of interferometric properties." In IGARSS 2015 - 2015 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2015. http://dx.doi.org/10.1109/igarss.2015.7327044.

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Reports on the topic "Compressive properties"

1

Economy, James. Composites with Improved Compressive Properties. Fort Belvoir, VA: Defense Technical Information Center, June 1994. http://dx.doi.org/10.21236/ada283411.

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Chartrand, Rick, and Valentina Staneva. Restricted isometry properties and nonconvex compressive sensing. Office of Scientific and Technical Information (OSTI), November 2007. http://dx.doi.org/10.2172/1454956.

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Fawaz, Scott A., Anthony N. Palazotto, and Chyi-Shan Wang. Compressive Properties of High Performance Polymeric Fibers. Fort Belvoir, VA: Defense Technical Information Center, March 1989. http://dx.doi.org/10.21236/ada207271.

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Markley, F., J. Hoffman, and D. Muniz. Cryogenic Compressive Properties of Basic Epoxy Resin Systems. Office of Scientific and Technical Information (OSTI), September 1985. http://dx.doi.org/10.2172/1156262.

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Ewart, Lynn M., Elizabeth A. McLaughlin, and Kim D. Gittings. Investigation of the Compressive Material Properties of PZT and PMN. Fort Belvoir, VA: Defense Technical Information Center, December 1999. http://dx.doi.org/10.21236/ada379761.

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E. Cikanek, T. Grant, and R. Blakely. DATA QUALIFICATION AND DATA SUMMARY REPORT: INTACT ROCK PROPERTIES DATA ON UNIAXIAL COMPRESSIVE STRENGTH, TRIAXIAL COMPRESSIVE STRENGTH, FRICTION ANGLE, AND COHESION. Office of Scientific and Technical Information (OSTI), February 2003. http://dx.doi.org/10.2172/838662.

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Groeneveld, Andrew, Theresa Ahlborn, C. Kennan Crane, and Wendy Long. Effect of fiber orientation on dynamic compressive properties of an ultra-high performance concrete. Geotechnical and Structures Laboratory (U.S.), August 2017. http://dx.doi.org/10.21079/11681/22806.

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Pinkerton, Gary Wayne. Compressive strength, plastic flow properties, and surface frictional effects of 1100, 3003 and 6061 aluminum alloys. Office of Scientific and Technical Information (OSTI), January 1993. http://dx.doi.org/10.2172/431169.

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Groves, S., and B. Cunningham. Tensile and Compressive Mechanical Properties of Billet Pressed LX17-1 as a Function of Temperature and Strain Rate. Office of Scientific and Technical Information (OSTI), January 2000. http://dx.doi.org/10.2172/802097.

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Santa Maria, J. A., B. F. Schultz, J. B. Ferguson, N. Gupta, and P. K. Rohatgi. Effect of Hollow Sphere Size and Distribution on the Quasi-Static and High Strain Rate Compressive Properties of Al-A380-Al2O3 Syntactic Foams. Fort Belvoir, VA: Defense Technical Information Center, January 2012. http://dx.doi.org/10.21236/ada565575.

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