Relevant bibliographies by topics / Compressive test

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Compressive test'

Author: Grafiati
Published: 4 June 2021
Last updated: 18 February 2022

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Journal articles on the topic "Compressive test"

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Huang, Zhong Hua, Shao Jun Liu, Ying Guang Xu, and Wang Hu. "Seafloor Polymetallic Sulfides Mechanical Property Test." Advanced Materials Research 1015 (August 2014): 316–19. http://dx.doi.org/10.4028/www.scientific.net/amr.1015.316.

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Seafloor polymetallic sulfide specimens were developed according to engineering rock test method standard (GB/T 50266-2013). Seafloor polymetallic sulfide wet density and dry density were tested. Uniaxial compressive strength and triaxial compression strength of seafloor polymetallic sulfide were tested using rock mechanics test system MTS 815. Elasticity modulus and Poisson's ratio of seafloor polymetallic sulfide were calculated based on specimens stress-strain curves. Cohesion and internal friction angle were calculated based on specimens triaxial test Mohr stress circle. Test results show that seafloor polymetallic sulfide dry density average value is 2.6 g/cm3, wet density average value is 2.94 g/cm3. Uniaxial compressive strength and triaxial compression strength of seafloor polymetallic sulfide are unstable. Average value of the uniaxial compressive strength is 10.243MPa. Average value of triaxial compression strength test peak load is 47.166KN. Cohesion is 2.447MPa and internal friction angle is 38.04o.
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Yan, Feng, and Nan Pang. "Low Strength Self Compacting Concrete Compressive Strength Test." Applied Mechanics and Materials 275-277 (January 2013): 2041–44. http://dx.doi.org/10.4028/www.scientific.net/amm.275-277.2041.

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In this paper,the mechanical properties were studied,the self compacting concrete cubic compression strength,prismatic compressive strength test,discussed two kinds of relationship between intensity index.
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Jin, Zhang. "Compressive test and simulation of cassava stems using ANSYS." Functional materials 23, no. 3 (September 27, 2016): 468–72. http://dx.doi.org/10.15407/fm23.03.468.

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Lan, Guanqi, Sisi Chao, Yihong Wang, and Ying Cui. "Methods to Test the Compressive Strength of Earth Blocks." Advances in Materials Science and Engineering 2021 (August 26, 2021): 1–11. http://dx.doi.org/10.1155/2021/1767238.

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The efficient design of new earth structures and the restoration of old structures both require a reliable assessment of the compressive strength of earth materials. However, there is still much debate on the best method to accurately measure the compressive strength of earth blocks. To solve the problem of measuring the compressive strength of the earth block, the cube specimen, the half-block stacked specimen, and the full-size block specimen are used to measure the compressive strength of the molded adobe and rammed adobe, respectively, considering the influence of the specimen preparation process, loading direction, capping, and other factors. By comparing and analyzing the stress state, failure mode, and compressive strength of the specimen under various test methods, a compressive strength test method of earth blocks is determined, which is simple to operate, easy to standardize, and as close as possible to the actual strength of the blocks. The results show that the full-size block compression test method along the block thickness direction should be preferred to test the compressive strength of the earth block. The standard specimen obtained by cutting the full-size block is not suitable for the test of the compressive strength of the earth block; it can effectively solve the problem that the compressive strength of the small-thickness earth block cannot be directly measured by cutting the full-size block in half and stacking it, but it is not recommended to use the binder to bond the two half-blocks. When comparing the compressive strength of the earth blocks, the conversion coefficient related to the height-to-thickness ratio of the specimen cannot be used to convert the compressive strength. Still, the anisotropy of the material strength should be considered.
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Deng, Ming Ke, Yun Tao Chang, and Xing Wen Liang. "Orthogonal Test Research on Compressive Strength Size Effect of ECC." Advanced Materials Research 538-541 (June 2012): 1789–95. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.1789.

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Engineered fiber reinforced cementitious composite (ECC) can significantly improve the seismic performance and durability of concrete structures, which has pseudo strain hardening and multiple cracking performances. Through 32 groups of 192 specimens for compressive strength of ECC, the orthogonal test study on the cube compression failure process, and further research on water binder ratio, fiber content by volume, fly ash content and sand binder ratio of 4 kinds of factors on the size effect of ECC cube compressive strength. The test result shows that: PVA fiber content increases, ECC compressive toughness is improved obviously; water binder ratio and fiber content are the main factors which affect the ECC compressive strength and size effect. When water binder ratio decrease, the compressive strength of ECC materials improve and size effect coefficient increase. Fiber content increase, the compressive strength of test block increase and the size effect coefficient increase. Through the bending tests, we know that: the fiber content by volume increases, the ECC flexural strength of the composite increases gradually.
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Kusaka, Takayuki, Takanori Kono, Yasutoshi Nomura, and Hiroki Wakabayashi. "Dynamic Compression Test of CFRP Laminates Using SHPB Technique." Applied Mechanics and Materials 566 (June 2014): 122–27. http://dx.doi.org/10.4028/www.scientific.net/amm.566.122.

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A novel experimental method was proposed for characterizing the compressive properties of composite materials under impact loading. Split Hopkinson pressure bar system was employed to carry out the dynamic compression tests. The dynamic stress-strain relations could be precisely estimated by the proposed method, where the ramped input, generated by the plastic deformation of a zinc buffer, was effective to reduce the oscillation of the stress field in the specimen. The longitudinal strain of gage area could be estimated from the nominal deformation of gage area, and consequently the failure process could be grasped in detail from the stress-strain relation. The dynamic compressive strength of the material was slightly higher than the static compressive strength. In addition, the validity of the proposed method was confirmed by the computational and experimental results.
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Tu, Nhung Hong, and Cong Thanh Nguyen. "ASSESSMENT OF TENSILE STRENGTH OF CONCRETE IN ACCORDANCE WITH ITS COMPRESSIVE STRENGTH." Scientific Journal of Tra Vinh University 1, no. 41 (December 29, 2020): 86–96. http://dx.doi.org/10.35382/18594816.1.41.2020.647.

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Concrete is the primary material used in construction. The importance of concrete is shown through its strength criteria which are indispensable in all structural designs of the engineers. This article is to determine the tensile strength of concrete according to the compressive strength through an experimental study for thestrength grade B15, B20, B25 of concrete. In this study, tensile and compressive strength of concrete were determined by tensile test and compression test on the same sample. The experimental results show that the tensile strength of concrete is much smaller than its compressive strength. For concrete at 28 days, the tensilestrength is 12,0% to 12,8% of the compressive strength. The reliability of the above compressive strength value is ensured by the standard compression test. The results of this study are recommended for practical testing of concrete strength.
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WATANABE, Hidekazu, Kiyoshi MIYAHARA, Yuuri OHTSUKA, Tomohisa MUKAI, Tsutomu HIRADE, Akihiro NAKAMURA, Yoshinobu KIYA, and Kazuki HIRAO. "UNIAXIAL COMPRESSIVE TEST FOR COMPRESSIVE DUCTILITY OF PRECAST CONCRETE PILE." AIJ Journal of Technology and Design 27, no. 66 (June 20, 2021): 726–31. http://dx.doi.org/10.3130/aijt.27.726.

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Li, Hong Qiao, Tong Hui Yue, and Zhi Hai Guo. "Experimental Study on Compressive Performance of Polyurethane Composite Panel." Advanced Materials Research 634-638 (January 2013): 2693–96. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.2693.

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Through compressive test on 18 polyurethane composite panels in 4 groups, observing their failure characteristics under compression, getting test result on compressive performance and load-deformation curve, analyzing failure reason, which will set the foundation for further experimental study and theoretical analysis.
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Liu, Han Bing, Hu Zhu Zhang, and Jing Wang. "Test Study on the Compressive Strength Properties of Compacted Clayey Soil." Key Engineering Materials 703 (August 2016): 380–85. http://dx.doi.org/10.4028/www.scientific.net/kem.703.380.

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In order to study the effect of water content, degree of compaction and stress state on bearing capacity of subgrade, the engineering compacted clayey soil was taken as the subject investigated, regulation of compressive strength changing with water content, degree of compaction and confining pressure were analyzed through triaxial compression test, and function relationships between compressive strength and water content, degree of compaction and stress state were fitted based on the test data. Results show that effects of water content, degree of compaction and confining pressure on compressive strength properties of subgrade compacted clayey soil are all remarkably. The compressive strength decreases according to a quadratic function with the increase of water content, as well as increases in accordance with a quadratic function with the increase of the degree of compaction, and increases linearly with the increase of confining pressure. Improving the construction compaction standard properly, adopting the essential lateral confinement measure and keeping a lower water content of the subgrade in service can improve the bearing capacity and stability of the highway subgrade.
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Dissertations / Theses on the topic "Compressive test"

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Ulker, Elcin. "Comparison Of Compressive Strength Test Procedures For Blended Cements." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612506/index.pdf.

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The aim of this thesis is to twofold, in order to demonstrate the variabilities that can be faced within the compressive strength of blended cements, one blended cement namely CEM IV / B (P-V) 32.5N is selected and the 28-day compressive strength is obtained by 16 different laboratories following TS EN 196-1 standard. Later, to show the variabilities that could be faced by different standards, three different cement types were selected and their compressive strengths are determined following two procedures first with TS EN 196-1, later with similar procedure described in ASTM. The strength of cement is determined by TS EN 196-1 in Turkey that is the same for all types of cements. However, American cement producers use different standards for testing the strength of Portland cement and blended cements. The main difference is the amount of water utilized in producing the cement mortar. It was observed that for Portland and Portland composite cements
there is not any significant difference in between the compressive strength results of cement mortars prepared by both methods. However, for pozzolanic cements, there is much deviance in the compressive strength results of cement mortars prepared by TS EN 196-1.
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McCamey, Morgan R. "Deep Learning for Compressive SAR Imaging with Train-Test Discrepancy." Wright State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=wright1624266549100904.

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Neumann, Karoline Mali. "Probabilistic Design of Midship Panel based on Model scale compressive Ice Test." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-22958.

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This thesis is investigating compressive ice loads acting on the mid-ship using a model experiment performed in Aalto ice tank where atactile sensor was mounted on the side. In order to get insight in thevery complex behavior of ice; the sea ice growth, mechanical prop-erties and failure mechanisms are presented. Further some previouswork on the topic is presented, with discussion, in addition to regula-tions on local ice loads and structure requirements. The execution ofthe experiment is described, and the method for processing the dataand based on this data using probabilistic design to design a midshippanel. For datasets where the interaction area is semi-continuous anew event denition is proposed, based on temporal events consistingof spatial events. The maximum event method developed by [Jordaanet al., 1993] is applied in sampling data from the new temporal events.Data is sampled for increasing area sizes corresponding to number ofconnected triggered censor cells. The data is adjusted for exposure inorder to have a standardized curve corresponding to the area in ques-tion. An exponential distribution is tted to the tail of the data, andpresented in a Weibull probability plot. The parameters of the distri-butions, x0 and are functions of area. Assuming the area is acting ina line corresponding to the span of a longitudinally framed panel, andgiven a return period and a scenario, a design load is predicted. Basedon this load, scantlings of a panel is recommended which also complieswith Finnish-Swedish ice class rules. The integrity of the structure ischecked using Monte Carlo analysis. To get more insight into the dataset, a local pressure area curve, and an average pressure over totalmeasured contact area relationship is presented for the entire data set,as well as spatial and process pressure area curves and pressure historyfor the biggest load event and the biggest pressure event.
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Moffett, Theodore James. "Relationship Between Compressive Strength of Different Shape and Thickness Specimens of Type S Mortar." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/8811.

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Mortar is the cementitious binding material placed between masonry blocks to create a composite system. The American Society of Testing and Materials (ASTM), along with other organizations, have established the testing of prismatic mortar specimens for evaluating mechanical properties, like compressive strength. Mortar joints, however, possess vastly different characteristics compared to prismatic specimens, especially in terms of geometry and water content. These differences prevent a direct comparison of compressive strength between prismatic specimens and actual mortar joints in the assembly. The objective of this study was to analyze Type S mortar joints, with particular emphasis on specimen shape and water content, to draw accurate comparisons of compressive strength to ASTM prescribed mortar prismatic specimens.To examine the effect of water on mortar compressive strength, three different water contents were evaluated across nearly all testing series. Cubic (2-in) and cylindrical (2 by 4-in) mortar specimens were prepared and tested according to ASTM guidelines to verify the compressive strength relationship described by ASTM and to be used as comparative data. In addition, a small masonry wall was assembled and cured in a laboratory to simulate true properties of mortar joints. Mortar joints subjected to testing were a combination of thin slices cut from prismatic specimens as well as in-place bed joints cured between concrete masonry units (CMU). Two unorthodox test methods, the double punch test (DPT) and helix pull-out test (HPT), were selected as methods for assessing mortar joints. In addition, confining effects from neighboring material common to DPT were evaluated as a function of specimen face dimensions. The compressive strength ratio obtained through testing of 2-in cubic and 2 by 4-in cylindrical specimens was lower than ASTM recommendations. This may have been in part due to testing cylindrical specimens with rough surfaces and no capping material. DPT confinement on 2-in square and 2-in diameter circular specimens was found to be equivalent. Thinly sliced specimens tested in DPT showed increases in compressive strength as water content and specimen thickness decreased. As a whole, DPT results on thin mortar slices showed promise for accurate comparison to prismatic mortar specimens. In-place mortar joints tested in HPT showed moderate to high scatter. In addition, evaluation via HPT was determined to be more appropriate for qualitative rather than quantitative assessments of in-situ mortar.
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Jones, John David. "Evaluation of the MD shear test method as a criterion for predicting box compressive strength." Master's thesis, University of Cape Town, 2004. http://hdl.handle.net/11427/8620.

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Includes bibliographical references (leaves 145-149).
Corrugated board is a composite sandwich type material used in the packaging industry worldwide. In the design of corrugated boxes, the stacking strength is an important design parameter. Current research shows that box failure is influenced by the flexural rigidities of the panel and its transverse shear rigidities. McKinlay proposed a new method to measure the MD transverse shear stiffness of corrugated board. This research was aimed at designing a fixture to perform the MD shear test and to evaluate its performance. In addition, the properties that influence box strength were to be investigated. These properties were then to be used in improved box strength predictions. It was found that the designed MD shear fixture was able to measure the transverse shear stiffness of corrugated board in the MD direction with a high degree of accuracy and reproducibility. This method was much easier to perform than the standard block shear test method and also much quicker. This was a very important factor considering the application of this testing method in a research and development environment. In addition, the stiffness test exhibited good possibilities for use as a quality control tool. Extensive testing showed that the material used in the manufacture of corrugated board had a strong influence on board and box strength. In addition, it was found that the separation of the faces in a corrugated board structure had an influence on the strength and stability of the box. Factors such as the manufacturing process and board structure were also found to have an effect on box strength. Box strength predictions were performed using the methods available in the literature. These predictions had good correlation with the experimental box compression values. It was shown that box strength can be accurately predicted from liner and fluting properties and this capability is an important tool in box strength design.
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Reynolds, Michael Scott. "A Relationship Between the Strengths of Type N Cubic Mortar Specimens and In-Situ Mortar." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/7572.

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The compressive strength of mortar is typically determined using the American Societyfor Testing and Materials (ASTM) standard method using 2 inch cubes which are compressed tillfailure. There is however a disparity between the compressive strengths of mortar cubes, and insitumortar. This disparity is a result of the differences in thickness, aspect ratio, curingconditions, water content, and confinement between mortar cubes and mortar joints. While thesedifferences lead to mortar joints being stronger than mortar cubes, a relationship between theirstrengths is desired.Two less-common mortar strength tests were used to determine more accurately thecompressive strength of in-situ mortar. The results of both tests were compared to the results ofASTM standard compressive testing with mortars of the same water content. The first was theDouble Punch test which involves the use of two metal punches that compress either side of athin mortar sample till failure. The Double Punch test is more difficult to perform than theASTM standard compression test, but was useful because it simulates the confinement that insitumortar will experience. The Double Punch test was also used with mortar specimens ofvarying thickness to determine a relationship between specimen thickness and compressivestrength. The second test used was the Helix Pullout test. This test is performed by insertingmetal helical screws into a mortar joint, and pulling from the joint while restricting rotation. Themaximum load used to extract the Helix is recorded as the Pullout Load, and is used to find thecompressive strength by use of a calibration curve. This test was used on a masonry wall paneland mortar cubes were also made with the same mortar for compressive testing.The tested mortar exhibited decreased compressive strength with increased water content.The mortar also decreased in strength with increasing specimen thickness. Mortar joints wereshown to be significantly stronger than mortar cubes based on factors of specimen thickness andconfinement by an average factor of at least 2.40. Although results are affected by punchdiameter, the Double Punch test was shown to be a consistent and reliable means of estimatingmortar compressive strength. The Helix Pullout test exhibited wide variation, and wasdetermined to be primarily useful for qualitative comparison as opposed to quantitativedetermination of strength.
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Dean, Maureen A. "Predictions of Distal Radius Compressive Strength by Measurements of Bone Mineral and Stiffness." Ohio University Art and Sciences Honors Theses / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ouashonors1461595642.

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Crook, Amy Lyn. "Assessment of the Tube Suction Test for Identifying Non-Frost-Susceptible Soils Stabilized with Cement." BYU ScholarsArchive, 2006. https://scholarsarchive.byu.edu/etd/804.

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Frost heave is a primary mechanism of pavement distress in cold regions. The distress exhibited is dependent on the frost susceptibility of the soil within the depth of frost penetration, the availability of subsurface water, and the duration of freezing surface temperatures. Cement stabilization is one technique used to mitigate the effects of frost heave. The tube suction test (TST) is one possible method for determining the frost susceptibility of soils in the laboratory. The purpose of this research was to assess the utility of the TST for identifying non-frost-susceptible (NFS) materials stabilized with cement. This research investigated two aggregate base materials from Alaska that have exhibited negligible frost susceptibility in the field. The unconfined compressive strength (UCS), final dielectric value in the TST, and frost heave at three levels of cement treatment and in the untreated condition were evaluated for both materials. The data collected in this research indicate that, for the two known NFS materials included in this study, the TST is a good indicator of frost heave behavior. The total heave of the untreated materials was approximately 0.15 in. at the conclusion of the 10-day freezing period, which classifies these materials as NFS according to the U.S Army Corp of Engineers. Both materials had final dielectric values of less than 10 in the TST, indicating a superior moisture susceptibility rating. The results of this research suggest that the TST should be considered for identifying NFS materials, including those stabilized with cement. Additional testing should be performed on known NFS materials stabilized with cement and other additives to further assess the validity of using the TST to differentiate between frost-susceptible and NFS materials. Consistent with previous studies, this research indicates that, once a sufficient amount of cement has been added to significantly reduce frost heave, additional cement has only a marginal effect on further reduction. Therefore, to avoid unnecessary expense in construction, the minimum cement content required for preventing frost heave should be identified through laboratory testing and specified by the engineer. In this work, UCS values ranging between 200 psi and 400 psi after a 7-day cure were typically associated with this minimum cement content. Because the scope of this research is limited to two aggregate base materials, further testing is also necessary to validate this finding.
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Cunto, Flávio José Craveiro. "Determinação do módulo de resiliência através de ensaios triaxiais dinâmicos e a sua estimativa a partir de ensaios de compressão simples: estudo de três solos do nordeste brasileiro." Universidade de São Paulo, 1998. http://www.teses.usp.br/teses/disponiveis/18/18137/tde-28022018-142425/.

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O módulo de resiliência é um parâmetro de crucial importância nas análises mecanísticas que envolvem a estimativa das tensões e deformações na estrutura do pavimento e no seu subleito, quando da ação do tráfego. Embora ensaios de campo possam ser empregados para se determinar o MR, a grande maioria das pesquisas nesse sentido são desenvolvidas em laboratório, onde é possível um maior controle das condições da amostra, dos sistemas de aplicação de carregamento e de medida dos deslocamentos. Entretanto, os ensaios em laboratório que visam à determinação do MR ainda são considerados especiais e exigem equipamentos relativamente complexos, ensejando portanto, pesquisas com a finalidade de se obter expressões que estimem o MR a partir de parâmetros advindos de ensaios mais simples e rotineiros. Neste trabalho foram realizados ensaios triaxiais dinâmicos para a determinação do módulo de resiliência de três solos empregados em rodovias do nordeste brasileiro. Através dos resultados de laboratório, verificou-se o desempenho dos modelos mais comumente empregados para se representar a variação do módulo de resiliência em função do estado de tensão. Observou-se para os três solos desta pesquisa, que o MR foi mais influenciado, quanto ao estado de tensão, pela tensão de confinamento e pela tensão principal maior. Analisou-se, por fim, a existência de uma expressão matemática entre o módulo de resiliência obtido a partir dos ensaios triaxiais dinâmicos e o módulo tangente inicial proveniente de ensaios de compressão simples, sob diversos níveis de tensão. Os resultados mostram que este tipo de associação é promissora, mas exige-se que o universo de solos estudados seja ampliado para que se estabeleça uma inferência decisiva.
Resilient modulus is a crucial parameter in mechanistic analysis involving the estimation of stress and strains under the pavement structure subjected to traffic loading. While field tests can be used to determine the dynamic behavior of soils, most researches favor laboratory tests. Such preference is based on the fact that laboratory tests are less constrained because of their carefully controlled conditions. Unfortunately these tests are still unusual due to relative complex equipment, therefore researches involving the correlation of resilient modulus from repeated load triaxial tests with other test results is needed. In this work, repeated load triaxial tests were performed on three soils used in northeastern Brazilian roadways to estimate the resilient modulus. The performance of the models most commonly adopted to represent resilient modulus as a function of state of stress were verified. lt was observed for the three soils in this research, that confining stress and principal major stress influenced resilient moduli values. Predictive equations correlating the resilient modulus from repeated load triaxial tests and parameters from compressive strength tests, considering different states of stress were investigated. lt was shown that this type of empirical correlation presented satisfactory results, although incisive conclusions can\'t be drawn without a wider number and variety of soils.
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Lundgren, Daniel, and Michael Persson. "Kvalitetsprovning av låskulor till hydrauliska snabbkopplingar." Thesis, Högskolan i Skövde, Institutionen för teknik och samhälle, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-6053.

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Ett företag som tillverkar hydrauliska snabbkopplingar har genom regelbundna kvalitetsprover upptäckt att vissa låskulor till snabbkopplingarnas låsmekanism plötsligt fått en bristande kvalité och spricker vid belastning. Låskulorna är gjorda av rostfritt stål och har en viktig funktion i låsmekanismen. Om de spricker vid användning kan det leda till konsekvenser med materiella skador eller personskador. Företaget vill förekomma eventuella kvalitetsproblem och måste därför säkerställa att låskulorna har rätt hållfasthet. Låskulorna köps in från en underleverantör och företaget vill därför utveckla en provmetod som provar låskulornas materialegenskaper när de levereras till fabriken. Arbetet i denna rapport syftar till att hjälpa företaget utveckla en sådan provmetod. Ett första steg är att undersöka orsaken till att låskulorna spricker. Materialanalyser utförs av ett materiallaboratorium för att fastställa vilka faktorer i materialet som orsakar brott i låskulorna. Analyserna visar att låskulorna sannolikt spricker på grund av en ökad sprödhet i materialet. Sprödheten beror på att martensiten i materialet är dåligt anlöpt samt en stor mängd karbider. Med orsaken till sprickorna fastställd undersöks befintliga metoder för materialprovning. En provmetod måste prova materialet i färdigtillverkade låskulor eftersom låskulornas tillverkningsprocess påverkar materialegenskaperna. Många av de standardiserade provmetoderna är dock svåra att tillämpa på låskulorna med anledning av låskulornas geometri och små dimensioner. En form av slagprov och pressprov utförs på låskulorna. Ett av syftena med proven är att undersöka om de är lämpliga att använda som provmetod. Genom proven framträder olika materialegenskaper för olika låskulor. Resultaten är dock inte jämförbara låskulorna emellan och proven anses inte vara lämpliga som provmetod. Även ett utmattningsprov utförs på låskulorna genom en upprepande belastning i en snabbkoppling. Detta prov är inte heller lämpligt att använda som provmetod då provet är mycket tidskrävande samt att det finns vissa osäkerheter kring provresultatet. I detta arbete undersöks även två nyligen framtagna provmetoder för kulor till kullager och möjligheten att tillämpa dessa provmetoder på låskulorna. I undersökningen jämförs de båda provmetoderna med avseende på utförande samt framtagning av provkropp. Även en spänningsanalys av en låskula belastad i en snabbkoppling utförs för att ta reda på i vilket område av låskulan de maximala spänningarna uppstår. Undersökningen ger att enbart en provmetod är intressant för fortsatt arbete.   Den provmetod som föreslås i detta arbete kallas "the notched ball test" (NBT). Provmetoden innebär att en djup och smal skåra bearbetas i en låskula som sedan belastas med en tryckande kraft vinkelrätt mot skåran tills brott uppstår. Den maximala spänningen som verkar vid brottet beräknas med en enkel ekvation och används som mått för låskulans hållfasthet. Provmetoden är lämplig då den går att utföra med befintlig utrustning på företaget, den provar materialet i färdigtillverkade låskulor samt i samma område som de maximala spänningarna i en låskula belastad i en snabbkoppling uppstår. NBT nyttjar även dragspänningar vilket är fördelaktigt när sprödhet ska upptäckas i ett material. För att fastställa hur olika materialegenskaper samt geometrier för provkroppen påverkar provresultaten utförs en djupare analys av provmetoden. Analysen ger även vilka geometrier som bör användas vid utförandet av NBT samt värdet för den konstant som används vid beräkning av brottspänningen. Praktiska prov av NBT utförs inte i detta arbete men rapporten innefattar slutsatser om provmetoden och rekommendationer till företaget hur ett fortsatt arbete med NBT kan utföras.
A company that manufactures hydraulic quick-couplings has discovered through regular quality checks that the quality of some of the locking balls for the locking mechanism in the quick couplings suddenly has become insufficient and the locking balls rupture under load. The locking balls are made of stainless steel and if they rupture during usage the consequences can be material damage or even personal injury. The company wants to prevent any quality problems and must therefore ensure that the strength of the locking balls is sufficient. The locking balls are purchased from a subcontractor and the company would therefore like to develop a method for strength testing locking balls delivered to the factory. This thesis aims to help the company in developing such a method.  A first step is to investigate the cause of the locking balls rupture. Material analyses are executed by a material laboratory in order to determine what features in the material that causes the ruptures. The analyses shows that rupture is probably caused by an increased brittleness in the material and the brittleness is a consequence of less tempered martensite and a high amount of carbides. With the cause of rupture determined, existing methods for testing material properties is studied. It is important that strength testing is carried out with test specimens prepared from the actual locking balls. Otherwise the influence of the locking balls manufacturing process on the material properties is not taking into account. Many of the standardized methods for testing material properties, however, are hard to apply to the locking balls due to the geometry and small dimensions of the locking balls. A kind of impact test and compression test is performed. One of the purposes with the tests is to investigate if they are adequate for strength testing the locking balls. The results of the tests, however, are not suitable for comparison. Also, a fatigue test of the locking balls is performed by a repetitive loading of a quick coupling. The fatigue test is, however, time consuming and there are uncertainties in the test results. None of these tests is considered suitable as a strength testing method. In this thesis, two recently developed methods for strength testing ceramic balls and the possibility to apply these methods on the locking balls is studied. The study includes an analysis of the stress distribution in a locking ball under load to determine in which region the highest stresses occur. The study provides that only one of the methods is suitable for the locking balls due to differences in preparing the test specimen and which region of the locking ball that is tested in each method. The strength testing method that is proposed in this thesis is called the notched ball test (NBT). In NBT a long and narrow notch is cut in a locking ball which is then loaded in compression perpendicular to the notch until rupture occurs. The maximum stress acting at the rupture is calculated and used to determine the strength of the locking ball. NBT is suitable because it can be performed with existing equipment at the company, the test specimen is prepared from actual locking balls and the test uses tensile stresses which is an advantage when brittleness is to be detected in a material. An analysis of NBT is performed to determine how material properties and different notch geometries is affecting the test results. The analysis also gives some recommendations for notch geometries that should be used when performing NBT as well as a constant that is used when calculating the maximum stress. Practical experiments of NBT are not carried out in this thesis. Instead, conclusions regarding NBT and recommendations for the company on how they should proceed with NBT are given.
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Books on the topic "Compressive test"

1

Curtis, P. T. An improved engineering test method for the measurement of the compressive strength of unidirectional carbon fibrecomposites. London: HMSO, 1991.

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Bell, Timothy C. Text compression. Englewood Cliffs, N.J: Prentice Hall, 1990.

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Davis, Randall C. Analysis and test of superplastically formed titanium hat-stiffened panels under compression. [S.l.]: [s.n.], 1986.

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Hahn, H. Thomas. Compression failure mechanisms of composite structures. [Washington, D.C.]: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1986.

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Masters, John E. Standard test methods for textile composites. [Washington, DC: National Aeronautics and Space Administration, 1996.

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Masters, John E. Standard test methods for textile composites. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1996.

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Li, Jian. Test and analysis of composite hat stringer pull-off test specimens. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1996.

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Chan, K. B. Static and dynamic compression tests of filament-wound CFRP and GRP tubes under axial compression. Manchester: UMIST, 1992.

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Verderaime, V. Test load verification through strain data analysis. Washington, DC: National Aeronautics and Space Administration, 1995.

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Alistair, Moffat, and Bell Timothy C, eds. Managing gigabytes: Compressing and indexing documents and images. New York: Van Nostrand Reinhold, 1994.

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Book chapters on the topic "Compressive test"

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Osman, Nur Masyitah, Ahmad Syauqi Md Hasan, Mohd Khairul Azhar Ismail, Aniza Albar, and Mohd Mustaqim Noordin. "Empirical Correlation of Tropical Weathered Sandstone Uniaxial Compressive Strength Using Unconfined Compression Test and Point Load Test." In Regional Conference on Science, Technology and Social Sciences (RCSTSS 2016), 427–34. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0074-5_41.

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Haeberle, J., and F. L. Matthews. "Studies on Compressive Failure in Unidirectional CFRP Using an Improved Test Method." In Developments in the Science and Technology of Composite Materials, 517–23. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0787-4_71.

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Ogunbayo, Babatunde, and Clinton Aigbavboa. "Experimental Investigation of Concrete Block Walls Compressive Strength Using a Non-destructive Test." In Collaboration and Integration in Construction, Engineering, Management and Technology, 393–97. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-48465-1_66.

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Kashyap, V. S., G. Sancheti, K. Arora, S. Jain, and K. Mahale. "Evaluating Compressive Strength of Concrete Comprising Nano Silica and Marble Dust Using Rebound Hammer Test." In Learning and Analytics in Intelligent Systems, 254–62. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-42363-6_30.

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Trimurtiningrum, Retno, and Aman Subakti. "Compressive Strength and Shrinkage Test of Flowing Concrete Using Fly Ash and Naphtalene-Based Superplasticizer." In Springer Proceedings in Physics, 445–54. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56062-5_37.

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Navabi, Zainalabedin. "Test Compression." In Digital System Test and Testable Design, 345–73. Boston, MA: Springer US, 2010. http://dx.doi.org/10.1007/978-1-4419-7548-5_10.

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Ramanathan, Sivakumar, Prannoy Suraneni, Ying Wang, Hongyou Shan, Amir Hajibabaee, and Jason Weiss. "Combining Reactivity Test, Isothermal Calorimetry, and Compressive Strength Measurements to Study Conventional and Alternative Supplementary Cementitious Materials." In RILEM Bookseries, 445–54. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22034-1_50.

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Brown, Roger. "Compression." In Physical Test Methods for Elastomers, 155–60. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-66727-0_11.

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Chattopadhyay, Santanu. "Test-Data Compression." In Thermal-Aware Testing of Digital VLSI Circuits and Systems, 53–70. First edition. | Boca Raton, FL : Taylor & Francis Group, CRC Press, 2018.: CRC Press, 2018. http://dx.doi.org/10.1201/9781351227780-3.

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Molenda, Marek. "Triaxial Compression Test." In Encyclopedia of Agrophysics, 924–25. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-90-481-3585-1_177.

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Conference papers on the topic "Compressive test"

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Ayub, Abin Bassam, Pallab Kumar Nath, Venkat Rangan, and Chetan Singh Thakur. "FPGA based Compressive Sensing Framework for Video Compression on Edge Devices." In 2020 24th International Symposium on VLSI Design and Test (VDAT). IEEE, 2020. http://dx.doi.org/10.1109/vdat50263.2020.9190441.

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Bolun Zhang, Yifan Zhang, and Binbin Li. "Compressive sensing method for production chip test." In 2015 China Semiconductor Technology International Conference (CSTIC). IEEE, 2015. http://dx.doi.org/10.1109/cstic.2015.7153462.

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Wang, Yucang, Fernando Alonso-Marroquín, Masami Nakagawa, and Stefan Luding. "Calibration of DEM simulation: Unconfined Compressive Test and Brazilian Tensile Test." In POWDERS AND GRAINS 2009: PROCEEDINGS OF THE 6TH INTERNATIONAL CONFERENCE ON MICROMECHANICS OF GRANULAR MEDIA. AIP, 2009. http://dx.doi.org/10.1063/1.3179944.

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Huang, Xiaoping, Anqing Wang, Weicheng Cui, and Rugang Bian. "The Fatigue Crack Growth Under Compressive to Compressive Fluctuating Loading." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20054.

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There are some components subjected to compressive and bending loading in ship and offshore structures and fatigue cracks were fond in compressive side of these components caused by fluctuation loadings, during their service. For better understanding the fatigue behavior of these components subjected to compressive to compressive loading, plate specimens with center crack (CCP) and plate specimens with double edge crack (DECP) have been designed for the experiment for examining the fatigue crack growth under axial compressive fluctuation loading. In this paper, a high strength steel plate was used as the test material. Fatigue test has been performed using MTS810 material testing system. Experimental results show that cracks can be propagated under compressive to compressive loading. It also shows that the cracks propagated to a certain length and then arrested completely. The experimental procedure and the phenomena are described. The stress-strain and the residual stress during a cycle were simulated by FEA. The stress intensity factor of the crack by residual stress and its propagation life were estimated and compared with the test data. The residual stress plays a very important role in crack growth under compression to compression fluctuation load.
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Neggazi, Mehdi, Latifa Hamami, and Abbes Amira. "A multi-scale analysis and compressive sensing based energy aware fall detection system." In 2013 Design and Test Symposium (IDT). IEEE, 2013. http://dx.doi.org/10.1109/idt.2013.6727125.

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Fornaro, Gianfranco, Antonio Pauciullo, Diego Reale, Matthias Weis, Alessandra Budillon, and Gilda Schirinzi. "Compressive sensing and generalized likelihood ratio test in SAR tomography." In 2016 4th International Workshop on Compressed Sensing Theory and its Applications to Radar, Sonar and Remote Sensing (CoSeRa). IEEE, 2016. http://dx.doi.org/10.1109/cosera.2016.7745706.

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Kobayashi, Takashi, Takahito Nishida, and Yuki Yamanaka. "Simplified Sealing Test Procedure of Gaskets Based on Compressive Strain." In ASME 2002 Pressure Vessels and Piping Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/pvp2002-1079.

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With the recent increase of safety and environmental concern, the estimation of leak rate of a gasketed flanged connection in piping systems is an important subject to be studied. In order to estimate the leak rate, the sealing behavior of a gasket must be known. Currently, evaluation methods of the sealing behavior are proposed in the North America and Europe independently. One of the problems is that the representations of the sealing behavior are rather complex in both the methods. Thus, gasket tests take a long time to perform and cost much. The authors have carried out investigations on the sealing behavior of compressed fiber sheet gaskets and have shown that the leak rate is uniquely determined by the compressive strain of gasket. This fact makes the test procedure much easier eliminating complex loading-unloading sequences. A simplified leak testing procedure, in which a simple one-way loading is employed, has proposed. Furthermore, an equation for the sealing behavior of gasket, in which the effect of dimensions of gaskets is taken into consideration, has proposed. In this study, investigations on the sealing behaviors are overviewed first. Then, it is shown that the conventional sealing behavior based on the gasket stress is easily obtained from the sealing behavior based on the gasket strain and the stress-strain diagram of gasket. Both the sealing behavior and the stress-strain diagram of gasket are expressed by equations in this method. Finally, it has also shown that the sealing behavior obtained by the simplified test can be fully converted to the ROTT (ROom Temperature Tightness Test) forms.
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Jing, Yuan, Li Ma, Ji Ma, Peng Li, and Bin Niu. "Robust compressive wideband spectrum sensing based on non-Gaussianity test." In 2014 IEEE/CIC International Conference on Communications in China (ICCC). IEEE, 2014. http://dx.doi.org/10.1109/iccchina.2014.7008365.

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Doi, Tatsuya, Yoshitaka Murono, and Ho Cho. "Model Test and Corresponding Simulation on Compressive Characteristics of Soilbags." In The 5th World Congress on Civil, Structural, and Environmental Engineering. Avestia Publishing, 2020. http://dx.doi.org/10.11159/icgre20.159.

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LEE, SANGHO, CHUNGHYEON KIM, and JAE-YEOL CHO. "EFFECT OF SPECIMEN SIZE OF STATIC COMPRESSIVE TEST ON THE DYNAMIC INCREASE FACTOR OF CONCRETE COMPRESSIVE STRENGTH." In SUSI 2018. Southampton UK: WIT Press, 2018. http://dx.doi.org/10.2495/susi180221.

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Reports on the topic "Compressive test"

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Kovacs, Austin. Axial Double-Ball Test Versus the Uniaxial Unconfined Compression Test for Measuring the Compressive Strength of Freshwater and Sea Ice. Fort Belvoir, VA: Defense Technical Information Center, December 1993. http://dx.doi.org/10.21236/ada277025.

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Trim, M., Matthew Murray, and C. Crane. Modernization and structural evaluation of the improved Overhead Cable System. Engineer Research and Development Center (U.S.), March 2021. http://dx.doi.org/10.21079/11681/40025.

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A modernized Overhead Cable System prototype for a 689 ft (210 m) Improved Ribbon Bridge crossing was designed, assembled, and structurally tested. Two independent structural tests were executed, i.e., a component-level compression test of the BSS tower was performed to determine its load capacity and failure mode; and a system-level ‘dry’ test of the improved OCS prototype was conducted to determine the limit state and failure mode of the entire OCS. In the component-level compression test of the BSS tower, the compressive capacity was determined to be 102 kips, and the failure mode was localized buckling in the legs of the tower section. During system-level testing, the prototype performed well up to 40.5 kips of simulated drag load, which corresponds to a uniformly distributed current velocity of 10.7 ft/s. If a more realistic, less conservative parabolic velocity distribution is assumed instead, the drag load for an 11 ft/s current is 21.1 kips. Under this assumption, the improved OCS prototype has a factor of safety of 1.9, based on a 689-ft crossing and 11-ft/s current. The OCS failed when one of the tower guy wires pulled out of the ground, causing the tower to overturn.
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Baral, Aniruddha, Jeffrey Roesler, M. Ley, Shinhyu Kang, Loren Emerson, Zane Lloyd, Braden Boyd, and Marllon Cook. High-volume Fly Ash Concrete for Pavements Findings: Volume 1. Illinois Center for Transportation, September 2021. http://dx.doi.org/10.36501/0197-9191/21-030.

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High-volume fly ash concrete (HVFAC) has improved durability and sustainability properties at a lower cost than conventional concrete, but its early-age properties like strength gain, setting time, and air entrainment can present challenges for application to concrete pavements. This research report helps with the implementation of HVFAC for pavement applications by providing guidelines for HVFAC mix design, testing protocols, and new tools for better quality control of HVFAC properties. Calorimeter tests were performed to evaluate the effects of fly ash sources, cement–fly ash interactions, chemical admixtures, and limestone replacement on the setting times and hydration reaction of HVFAC. To better target the initial air-entraining agent dosage for HVFAC, a calibration curve between air-entraining dosage for achieving 6% air content and fly ash foam index test has been developed. Further, a digital foam index test was developed to make this test more consistent across different labs and operators. For a more rapid prediction of hardened HVFAC properties, such as compressive strength, resistivity, and diffusion coefficient, an oxide-based particle model was developed. An HVFAC field test section was also constructed to demonstrate the implementation of a noncontact ultrasonic device for determining the final set time and ideal time to initiate saw cutting. Additionally, a maturity method was successfully implemented that estimates the in-place compressive strength of HVFAC through wireless thermal sensors. An HVFAC mix design procedure using the tools developed in this project such as the calorimeter test, foam index test, and particle-based model was proposed to assist engineers in implementing HVFAC pavements.
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Becker, Peter J. Using the Light Weight Deflectometer for Performance-Based Quality Assurance Testing of Cement Modified Subgrades. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317304.

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This report documents the findings from SPR-4230 (Alternative Quality Assurance Methods for Compacted Subgrade). The main objective of SPR-4230 involved establishing performance-related quality assurance (QA) test methods for pavement subgrade construction. Because INDOT generally prefers specifying subgrade treatment type IBC (i.e., 14-in. cement modified subgrade), this study focused on performance-based QA test methods for constructing cement modified subgrade. Moreover, INDOT prefers using light weight deflectometer (LWD) for chemically modified subgrade construction acceptance, so this study aimed to use LWD deflection measurements as performance-related construction acceptance criteria. A laboratory study was performed to relate LWD deflections with resilient modulus that is the key subgrade performance-related parameter in pavement design. In addition, LWD deflections were related with unconfined compressive strength increase that is the key parameter in chemical soil modification mix design. A rigorous field study consisting of LWD testing and falling weight deflectometer (FWD) testing at INDOT new pavement construction sites was conducted to verify the laboratory developed relationship. Recommendations for implementing results of this study into cement modified subgrade construction acceptance is provided, as are recommendations for future research.
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Leduc, D. PACKAGING MATERIAL COMPRESSION TESTS. Office of Scientific and Technical Information (OSTI), November 1993. http://dx.doi.org/10.2172/1179680.

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Surtees, A., and M. West. Signaling Compression (SigComp) Torture Tests. RFC Editor, June 2006. http://dx.doi.org/10.17487/rfc4465.

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Corona, Edmundo. Numerical Simulations of the Kolsky Compression Bar Test. Office of Scientific and Technical Information (OSTI), October 2015. http://dx.doi.org/10.2172/1226520.

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Thompson, Darla, and Racci DeLuca. LX-07 Quasi-Static Compression Tests. Office of Scientific and Technical Information (OSTI), November 2014. http://dx.doi.org/10.2172/1164012.

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Weiss, Charles, William McGinley, Bradford Songer, Madeline Kuchinski, and Frank Kuchinski. Performance of active porcelain enamel coated fibers for fiber-reinforced concrete : the performance of active porcelain enamel coatings for fiber-reinforced concrete and fiber tests at the University of Louisville. Engineer Research and Development Center (U.S.), May 2021. http://dx.doi.org/10.21079/11681/40683.

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A patented active porcelain enamel coating improves both the bond between the concrete and steel reinforcement as well as its corrosion resistance. A Small Business Innovation Research (SBIR) program to develop a commercial method for production of porcelain-coated fibers was developed in 2015. Market potential of this technology with its steel/concrete bond improvements and corrosion protection suggests that it can compete with other fiber reinforcing systems, with improvements in performance, durability, and cost, especially as compared to smooth fibers incorporated into concrete slabs and beams. Preliminary testing in a Phase 1 SBIR investigation indicated that active ceramic coatings on small diameter wire significantly improved the bond between the wires and the concrete to the point that the wires achieved yield before pullout without affecting the strength of the wire. As part of an SBIR Phase 2 effort, the University of Louisville under contract for Ceramics, Composites and Coatings Inc., proposed an investigation to evaluate active enamel-coated steel fibers in typical concrete applications and in masonry grouts in both tension and compression. Evaluation of the effect of the incorporation of coated fibers into Ultra-High Performance Concrete (UHPC) was examined using flexural and compressive strength testing as well as through nanoindentation.
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Dyer, S., A. Faburada, K. Gallavan, M. Hoogendyk, and P. Hui. Compression Strength and Drop Test Performance of XM232 Case Assemblies,. Fort Belvoir, VA: Defense Technical Information Center, December 1995. http://dx.doi.org/10.21236/ada303269.

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