Log in

Relevant bibliographies by topics / Uniaxial compression testing

Contents

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers

Academic literature on the topic 'Uniaxial compression testing'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Uniaxial compression testing.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Uniaxial compression testing"

1

Jerabek, M., Z. Major, and R. W. Lang. "Uniaxial compression testing of polymeric materials." Polymer Testing 29, no. 3 (May 2010): 302–9. http://dx.doi.org/10.1016/j.polymertesting.2009.12.003.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Li, Zong Zhan, Jun Lin Tao, and Yi Li. "Experimental Research on Acoustic Emission of Granite under Uniaxial Compression and Splitting Tensile." Applied Mechanics and Materials 232 (November 2012): 24–27. http://dx.doi.org/10.4028/www.scientific.net/amm.232.24.

Full text

Abstract:

This paper makes the acoustic emission of granite under uniaxial compression and splitting tensile test by electro-hydraulic testing machine and AE .We studied the relationship of uniaxial compressive strength and splitting tensile strength with the loading rate and AE characteristics of granite .The results show that uniaxial compressive strength and peak strain raise with loading rate, the AE energy gradually increases and get maximum in the 30% of the peak stress in the process of uniaxial compression test, and in the splitting tensile AE energy generates in the initial loading and gets maximum when the granite brittle fracture.

APA, Harvard, Vancouver, ISO, and other styles

3

FUKUI, Katsunori, Seisuke OKUBO, and Takafumi TERASHIMA. "Electromagnetic Wave Emission in Uniaxial Compression Testing." Shigen-to-Sozai 117, no. 9 (2001): 703–10. http://dx.doi.org/10.2473/shigentosozai.117.703.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Bürckert, Michael, Nicolas J. Briot, and T. John Balk. "Uniaxial compression testing of bulk nanoporous gold." Philosophical Magazine 97, no. 15 (February 21, 2017): 1157–78. http://dx.doi.org/10.1080/14786435.2017.1292060.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Stimpson, B., and Rui Chen. "Measurement of rock elastic moduli in tension and in compression and its practical significance." Canadian Geotechnical Journal 30, no. 2 (April 1, 1993): 338–47. http://dx.doi.org/10.1139/t93-028.

Full text

Abstract:

The moduli of deformation of rock in tension and in compression are generally assumed equal. However, many rocks show different deformation properties when loaded in tension and in compression. This property is usually referred to as bimodularity. In this paper, a new testing technique in which moduli in both tension and compression can be measured on the same specimen in the same compressive loading frame is described. Testing results from halite, potash, granite, and limestone indicate that moduli in compression and in tension are different for at least three of these materials. The new testing technique is validated against the standard uniaxial tension and uniaxial compression tests on potash and halite. Also, results from granite by the new testing technique are comparable with previously published data. The practical significance of rock bimodularity is discussed as well. It is demonstrated that this property significantly influences the deflection and stress distribution in a simple beam problem. Bimodularity also influences the interpretation of indirect rock tension test results and the prediction of roof deflection in underground openings. Ignoring bimodularity overestimates rock tensile strength in most of the indirect rock tension tests and underestimates roof deflection. Key words : rock, elastic modulus, bimodularity, testing technique.

APA, Harvard, Vancouver, ISO, and other styles

6

Cui, Feng-kun, Huai-shuai Shang, Tie-jun Zhao, Guo-xi Fan, and Guo-sheng Ren. "Mechanical and Failure Criteria of Air-Entrained Concrete under Triaxial Compression Load after Rapid Freeze-Thaw Cycles." Advances in Materials Science and Engineering 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/6786270.

Full text

Abstract:

The experiment study on the air-entrained concrete of 100 mm cubes under triaxial compression with different intermediate stress ratioα2=σ2D : σ3Dwas carried out using a hydraulic-servo testing system. The influence of rapid freeze-thaw cycles and intermediate stress ratio on the triaxial compressive strengthσ3Dwas analyzed according to the experimental results, respectively. The experimental results of air-entrained concrete obtained from the study in this paper and the triaxial compression experimental results of plain concrete got through the same triaxial-testing-system were compared and analyzed. The conclusion was that the triaxial compressive strength is greater than the biaxial and uniaxial compressive strength after the same rapid freeze-thaw cycles, and the increased percentage of triaxial compressive strength over biaxial compressive strength or uniaxial compressive strength is dependent on the middle stress. The experimental data is useful for precise analysis of concrete member or concrete structure under the action complex stress state.

APA, Harvard, Vancouver, ISO, and other styles

7

Vračević, Doris, Sanja Dugonjić Jovančević, Josip Peranić, and Marko Hodanić. "Determination of Uniaxial Compressive Strength of Limestone." Zbornik radova 22, no. 1 (December 20, 2019): 123–40. http://dx.doi.org/10.32762/zr.22.1.8.

Full text

Abstract:

The most used parameter in rock engineering practice is the Uniaxial Compressive Strength (UCS). It is often estimated on the field or trough Index-to-strength conversion factors proposed by various researchers for a specific rock type. The research presented in the paper involved field estimation of Uniaxial Compressive Strength using Schmidt rebound hammer and Point Load laboratory testing on limestone rock samples. The results of the estimated UCS were compared to the Uniaxial Compression Strength laboratory testing results on limestone specimens taken from the same location, in order to compare corresponding UCS of limestone rocks. These results can contribute to better estimation of the local design parameters, when direct determination of the UCS in the laboratory is not possible, rather than adopting the values from around the world case studies.

APA, Harvard, Vancouver, ISO, and other styles

8

Witkin, David, Bing Q. Han, and Enrique J. Lavernia. "Microstructural Evolution of an Ultrafine-grained Cryomilled Al 5083 Alloy During Thermomechanical Processing." Journal of Materials Research 20, no. 8 (August 1, 2005): 2117–26. http://dx.doi.org/10.1557/jmr.2005.0261.

Full text

Abstract:

The microstructural changes in cryomilled and consolidated Al 5083 following compression testing at several temperatures are described. Prior to testing, the material had an average grain size of approximately 138 nm and exhibited a duplex microstructure, containing coarse grains between 500 and 2000 nm. After uniaxial compressive deformation at temperatures between 423 and 573 K (0.49–0.66 Tm), the average grain size increased to between 200 and 300 nm, consistent with the average grain size of extrusions formed from the same material at similar temperatures. The similarity in grain size distribution following uniaxial compression or extrusion despite differences in total strain and stress state imposed by each indicates that much of the deformation in the extrusion process occurs in coarse-grained regions.

APA, Harvard, Vancouver, ISO, and other styles

9

Adami, J. N., D. Bolsch, J. Bressers, E. Fenske, and M. Steen. "Uniaxial tension and cyclic tension-compression testing of ceramics." Journal of the European Ceramic Society 7, no. 4 (January 1991): 227–36. http://dx.doi.org/10.1016/0955-2219(91)90024-t.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Xia, Wei, Erlei Bai, Jinyu Xu, and Gaojie Liu. "Experimental Study on the Strength and Deformation Characteristics of Concrete under True Triaxial Compression after Sulfate Attack." Advances in Civil Engineering 2021 (April 14, 2021): 1–15. http://dx.doi.org/10.1155/2021/5548313.

Full text

Abstract:

To explore the mechanical properties of concrete under true triaxial static compressive load after sulfate attack, uniaxial static compression test and true triaxial static compression test at four stress ratios were carried out on concrete specimens immersed in 15% sulfate solution for 0–120 days by the integrated true triaxial static and dynamic load testing system, and the variation of performance indicators such as the strength and deformation of concrete under the coupling action of sulfate attack and complex stress state was analyzed. The results show that the uniaxial compressive strength of concrete increases at the beginning and then decreases with the increase of sulfate attack time and reaches the peak on the 30th day, with an increase rate of 16.57%; the strength of concrete under triaxial compression increases significantly, and the maximum triaxial compressive strength is 3.18 times of uniaxial compressive strength under the combination of 0-day sulfate attack and 0.2 : 0.8 stress ratio; and the deterioration of concrete under sulfate attack is more prominent at high confining pressure, and as the sulfate attack worsens, the sensitivity of triaxial compressive strength of concrete to lateral compressive stress is reduced. In conclusion, triaxial compression can significantly enhance the ductility of concrete by playing a role in restraining the deformation and cracking of concrete after sulfate attack.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "Uniaxial compression testing"

1

Salam, Jamal Mohamad. "Application of cyclic uniaxial compression testing to investigate the effects of preload and other factors on the structural properties of concrete affected by alkali silica reaction." Thesis, Queen Mary, University of London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261641.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Wasserbauer, Jaromír. "Mechanické vlastnosti mikrostrukturních komponent anorganických materiálů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2013. http://www.nusl.cz/ntk/nusl-233368.

Full text

Abstract:

Disertační práce se zabývá studiem strukturních a mechanických vlastností anorganických materiálů. Cílem je nalezení jednotlivých fází ve zkoumaném materiálu a hlavně lokalizace (mechanicky) nejslabšího místa, jeho ovlivnění a následně výroba materiálu o lepších mechanických vlastnostech. Z důvodu velkého množství použitých metod je základní teorie vložena vždy na začátku příslušné kapitoly. Taktéž z důvodu značného množství výsledků jsou na konci kapitol uvedeny dílčí závěry. Práce je rozdělena na tři části, kdy první se zabývá seznámením s možnostmi modelování mikro-mechanických vlastností a provedením experimentů umožňujících posouzení rozsahu platnosti některého modelu. V druhé části je provedeno shrnutí současných možností indentačních zkoušek pro měření mechanických vlastností strukturních složek betonu a praktické zvládnutí metodiky vhodné k užití pro výzkum materiálů zkoumaných domovským pracovištěm. V třetí části je navržena metoda identifikace nejslabších článků struktury anorganických pojiv a její ověření na konkrétním materiálu zkoumaném na domovském pracovišti. V této dizertační práci jsou použity tyto metody: kalorimetrie, ultrazvukové testování, jednoosá pevnost v tlaku, nanoindentace, korelativní mikroskopie a rastrovací elektronová mikroskopie s energiově disperzním spektrometrem. Dílčími výsledky jsou kompletní charakterizace cementových materiálů, upřesnění stávajících poznatků a nalezení optimálního postupu pro charakterizaci. Hlavním výsledkem je inovativní přístup vedoucí k pozitivnímu ovlivnění materiálu.

APA, Harvard, Vancouver, ISO, and other styles

3

Resende, Rafaella Moreira Lima Gondim. "Avaliação dos efeitos da danificação e da acustoelasticidade sobre a velocidade de pulso ultrassônico em corpos de prova de concreto submetidos a compressão uniaxial." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-21052018-121753/.

Full text

Abstract:

A teoria da acustoelasticidade relaciona a variação de velocidade de propagação de ondas mecânicas à variação de tensão em um meio sólido. Em materiais frágeis como concreto, a danificação altera a velocidade de propagação paralelamente ao efeito acustoelástico. O objetivo deste trabalho é identificar e quantificar como a danificação e o efeito acustoelástico agem sobre a Velocidade de Pulso Ultrassônico (VPU) em corpos de prova de concreto submetidos a compressão uniaxial. Para tanto, foram realizadas três fases de ensaio. A primeira fase objetivou gerar dados para a análise da aplicação da interferometria de cauda de onda (Coda Wave Interferometry – CWI). Duas variações deste método foram estudadas e comparadas, com o propósito de determinar-se qual gera melhores resultados e quais parâmetros devem ser adotados para as análises. Para tal, um código computacional foi desenvolvido utilizando a linguagem Python 3.6.0. Foi constatado que a técnica do alongamento apresenta resultados melhores que a técnica tradicional da interferometria de cauda de onda. A segunda etapa foi dedicada ao estudo da variação de velocidade de propagação devido à recuperação de dano do corpo de prova. A terceira fase abordou a influência da geometria da amostra e da composição do concreto sobre a resposta do material à acustoelasticidade. Além disso, definiu-se um Índice de Dano (D) baseado na redução do módulo de elasticidade devido ao carregamento, a fim de isolar a variação de velocidade causada pelo efeito acustoelástico. Quanto ao estudo da recuperação de dano ao longo do tempo, a variação relativa de velocidade nas primeiras 24 horas após a retirada do carregamento se mostrou muito pequena em relação às variações geradas pelas condições de temperatura e umidade. Concluiu-se também que as amostras cilíndricas apresentaram respostas mais uniformes ao efeito acustoelástico que as amostras prismáticas. Por fim, o Índice de Dano se mostrou eficaz para isolar os efeitos da danificação e da acustoelasticidade sobre a VPU.
The acoustoelasticity theory relates the variation in propagation velocity of mechanical waves to the stress variation in a solid medium. In brittle materials such as concrete, damage affects the propagation velocity parallel to the acoustoelastic effect. This research aims to identify and quantify how damage and acoustoelastic effect act on Ultrasonic Pulse Velocity (UPV) in concrete samples subjected to uniaxial compression. In order to do so, three phases of testing were performed. The first one focused on generating data to analyze the application of the Coda Wave Interferometry (CWI). Two variations of this method were studied and compared, to the purpose of determining which variation shows better results and which parameters should be adopted in the analysis. To enable the analysis, a computational code using Python 3.6.0 language was developed. It was verified that the stretching technique shows better results than the traditional coda wave interferometry technique. The second phase was dedicated to study the variation in propagation velocity due to damage recovery in the sample. The third phase addressed the influence of the sample geometry and the concrete composition over the response from the material to the acoustoelasticity. Furthermore, a Damage Index (D) was defined based on the elastic modulus reduction due to loading, in order to isolate the variation of velocity due solely to the acoustoelastic effect. Regarding the study of damage recovery over time, the relative velocity variation in the first 24 hours following the withdrawal of the loading showed to be too little when compared to the variations caused by temperature and humidity conditions. It was also concluded that the cylindrical samples showed more uniform responses to the acoustoelastic effect than the prismatic samples. Finally, the Damage Index proved itself to be a reliable tool to isolate the effects of damage and acoustoelasticity over the UPV.

APA, Harvard, Vancouver, ISO, and other styles

4

MORTON, JUSTIN. "An Investigation of Rat Vertebra Failure Behaviour Under Uniaxial Compression Through Time-Lapsed Micro-CT Imaging." Thesis, 2013. http://hdl.handle.net/1974/8477.

Full text

Abstract:

Osteoporosis is a bone degenerative disease characterized by reduced bone mass, quality and strength, along with changes in microarchitecture and increased incidence of fracture. The significant economic and social costs associated with osteoporotic fractures of the hip and spine have resulted in extensive research efforts directed towards developing an improved understanding of this disease, along with the relationships between osteoporotic bone degradation and fracture risk assessment. The current study investigates the failure behaviour of rat vertebral bodies collected from normal and osteoporotic donors based on the ovariectomized rat model (SHAM and OVX study groups, respectively), along with an additional control group intended to simulate postmenopausal patients with estrogen repletion (OVX+E study group). Simultaneous uniaxial compression testing and X-ray Micro-Computed Tomography (XμCT) were used to visualize and describe the failure behaviour of prepared vertebral body samples during mechanical testing, while providing standard measures of mechanical properties and bone geometry. In tandem with the incremental loading protocol required for simultaneous mechanical testing and XμCT imaging, a continuous loading protocol was also included. Three distinct failure behaviours were observed without bias in the three different study groups and two loading protocols. The primary and secondary failure modes involved fracture initiation in the direct vicinity of vascular apertures present in the dorsal surface of the cortical shell, with failure progression through the sample towards the ventral surface of the cortical shell (primary) or the cranial endplate (secondary). The tertiary failure mode involved localized rupture of the cranial endplate, likely resulting from end-effect related stress-concentrations. Diminished trabecular bone geometry (reduced BV/TV and Tb.N, along with increased Tb.Sp) was accompanied by reduced mechanical properties (reduced ultimate force and ultimate strength) in the OVX study group when compared with the SHAM and OVX+E study groups. Linear regression analyses revealed a shift in the determinants of failure initiation between the SHAM/OVX+E study groups and the OVX study group. In the SHAM and OVX+E study groups, ultimate force was best predicted by indices describing the vascular apertures present in the dorsal cortical shell. In the OVX study group, ultimate force was best predicted by indices describing trabecular bone geometry.
Thesis (Master, Mechanical and Materials Engineering) -- Queen's University, 2013-11-21 19:07:38.661

APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Uniaxial compression testing"

1

Babcock, C. O. True uniaxial compressive strengths of rock or coal specimens are independent of diameter-to-length ratios. Pgh. [i.e. Pittsburgh] PA: United States Dept. of the Interior, Bureau of Mines, 1990.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

2

Babcock, C. O. True uniaxial compressive strengths of rock or coal specimens are independent of diameter-to-length ratios. Washington, D.C. (2401 E St., N.W., MS #9800, Washington 20241): U.S. Dept. of the Interior, Bureau of Mines, 1990.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

3

Jerzy, Cieślik. Plastyczność i uszkodzenie wybranych skał w testach jednoosiowego i trójosiowego ściskania: Plasticity and damage of selected rocks in uniaxial and triaxial compression tests. Kraków: Wydawnictwa AGH, 2013.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Uniaxial compression testing"

1

"Uniaxial Compression Testing." In Mechanical Testing and Evaluation, 143–51. ASM International, 2000. http://dx.doi.org/10.31399/asm.hb.v08.a0003265.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

"Real-time CT testing of meso-damage evolution law of frozen cracked sandstone under uniaxial compression conditions." In Boundaries of Rock Mechanics, 177–80. CRC Press, 2008. http://dx.doi.org/10.1201/9780203883204-34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Ren, J., and H. Liu. "Real-time CT testing of meso-damage evolution law of frozen cracked sandstone under uniaxial compression conditions." In Boundaries of Rock Mechanics, 157–60. Taylor & Francis, 2008. http://dx.doi.org/10.1201/9780203883204.ch29.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Uniaxial compression testing"

1

Kaufman, R. P., T. S. Lam, A. Thompson, T. H. Topper, A. Dabayeh, and F. A. Conle. "Fatigue Testing of Sheet Metals Subject to Uniaxial Tension-Compression." In SAE 2001 World Congress. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2001. http://dx.doi.org/10.4271/2001-01-1321.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Vershinin, Stanislav A., Pavel A. Truskov, and Konstantin V. Kouzmitchev. "Sea Ice Crushing Under Uniaxial Compression and Tension Models." In ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/omae2004-51270.

Full text

Abstract:

The paper describes phenomenological models of ice crushing in compression and tension at a constant strain rate. They present the fundamentals of loaded ice behavior depending on objective factors, such as ice grain structure, salinity and temperature, and on subjective factors such as specimen size and testing methodology. The theoretical analysis is compared with experimental data.

APA, Harvard, Vancouver, ISO, and other styles

3

Bastiaan, Jennifer M., and Amir Khajepour. "Finite Element Modeling of Tire With Validation Using Tensile and Frequency Response Testing." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38286.

Full text

Abstract:

A physical testing program is performed in support of finite element model creation for a 50-series passenger car tire. ABAQUS finite element analysis software is used along with its standard material models. Uniaxial tension testing of tire samples cut from the tread composite, tread rubber and sidewall composite is performed in order to obtain material properties. Hyper-elastic material coefficients for tread rubber are fit using uniaxial tension test data. Results show that the Arruda-Boyce hyper-elastic material model fits the test data well and it predicts reasonable overall behavior in uniaxial tension and uniaxial compression. Most other hyperelastic material models are found to predict unrealistic behavior in uniaxial compression for the tire samples, especially in the 0 to 20% compressive strain range. Frequency response testing of two inflated passenger car tires of different sizes, makes and models is also performed to assist in defining the viscoelastic material model for tread rubber. Test results show that tire modal damping is in the 2 to 4% range for most modes below 200 Hz, and the response curves, modal density and modal damping are remarkably similar for the two tires tested. The tire finite element model with updated material properties is simulated for nine combinations of air inflation pressure and vertical load in order to calculate static loaded radius. The analysis results are compared with physical test results and the analysis results are found to deviate at most by 3% compared to the tests.

APA, Harvard, Vancouver, ISO, and other styles

4

Kemper, Andrew R., Anthony C. Santago, Joel D. Stitzel, Jessica L. Sparks, and Stefan M. Duma. "Biomechanical Response of Human Liver and Spleen Parenchyma in Uniaxial Unconfined Compression." In ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80895.

Full text

Abstract:

Motor vehicle collisions (MVCs) commonly result in serious blunt abdominal injuries [1]. Although abdominal injuries account for only 3–5% of all injuries observed in MVCs, they comprise 8% of AIS 3+ injuries, 16.5% of AIS 4+ injuries and 20.5% of AIS 5+ injuries [24]. Currently, no crash test dummies used to assess injury risk in MVCs are equipped to represent individual solid abdominal organs located asymmetrically in the human abdomen. Consequently, researchers and safety engineers rely on finite element models (FEMs) to assess the risk of automotive related abdominal injuries. However, the response of these models must be locally and globally validated based on appropriate biomechanical data in order to accurately assess injury risk. There have only been a few studies which have investigated the compressive material properties of liver or spleen by performing compression tests on isolated samples [5–8]. Although these studies have provided considerable insight into the factors that affect the material response of the liver and spleen parenchyma, these studies have been limited to testing of animal tissue, sub-failure loading, or a single loading rate. Therefore, the purpose of this study was to quantify the compressive material properties of human liver and spleen parenchyma at various loading rates in order to characterize the viscoelastic and failure response.

APA, Harvard, Vancouver, ISO, and other styles

5

Venet, G., C. Pondaven, C. Baudouin, L. Langlois, and T. Balan. "Uniaxial compression of 42CrMo4 on different testing devices: Influence on identification of material parameters for plasticity models." In PROCEEDINGS OF THE 22ND INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING: ESAFORM 2019. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5112539.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Wang, Roy, and Rudolph L. Gleason. "A Novel Compression Tester for Detecting Anisotropy in Very Soft Biological Tissues." In ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80933.

Full text

Abstract:

Quantifying the mechanical behavior of very soft tissues (VST) is important when studying responses to injury or designing therapeutic devices; fat, brain, or liver being examples of such tissues. VST can have poor suture retention or clamp holding strength, making tensile tests difficult. As a result, uniaxial compression tests are typically the preferred choice to quantify the mechanical behavior. In these tests, isotropy is generally assumed and measuring the deformation in only one direction is needed if the material is considered incompressible [13]. In this study we present a novel testing apparatus for use on VST under uniaxial compression that can detect anisotropic behavior of the tissue if present. We validate the tester using cardiac adipose tissue and isotropic rubber as the control. Understanding the directional behavior of the tissue is important since anisotropy would require testing in multiple directions to fully characterize the material properties.

APA, Harvard, Vancouver, ISO, and other styles

7

Davies, C. M., P. Sandmann, T. Ronneberg, P. A. Hooper, and Saurabh Kabra. "Residual Stress Measurements in a 316L Uniaxial Samples Manufactured by Laser Powder Bed Fusion." In ASME 2020 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/pvp2020-21704.

Full text

Abstract:

Abstract Uniaxial samples have been manufactured for tension/compression testing from 316L stainless steel by laser powder bed fusion (LPBF). Samples manufactured by LPBF are known to contain high levels of residual stresses. These uniaxial samples were built from a solid cylindrical rod and subsequently machined to reduce the central cross section of the sample to the required gauge diameter and improve the surface finish. Finite element (FE) models have been developed to simulate the LPBF process of the rods, their removal from the build plate and subsequent machining into the tension/compression samples. High tensile residual stresses were predicted at the surface of the samples, balances by similar magnitude compressive stresses along their axis. Post machining however, these stresses were reduced by around 80% or more. Residual stress measurements were performed on the samples post machining using the neutron diffraction techniques. These measurements confirmed that negligible residual stresses remained in the samples post removal from the build plate and machining.

APA, Harvard, Vancouver, ISO, and other styles

8

Leung, Linus, Josee Perron, and Hani E. Naguib. "Constitutive Modeling for Porous PLGA 85/15 Scaffold in Compression." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15240.

Full text

Abstract:

Constitutive modeling of stress-strain relationship of open-celled PLGA 85/15 foams under compression was studied. A constitutive model for compressive behavior was directly derived from the morphology of a unit cubic cell. These constitutive equations describe the stress-strain relationship as a function of the foam's material properties and cell morphology, such as elastic modulus, yield stress, relative density, cell strut thickness, and cell size. To verify this model, uniaxial compression testing was performed on foam samples. Using the gas foaming/salt leaching method, the samples were prepared by using different foaming parameters such as salt/polymer mass ratio, saturation pressure, and saturation time. The comparisons of theoretical and experimental data demonstrate that the constitutive model using a cubic unit cell accurately describes the behavior of PLGA foams with low relative densities under compression.

APA, Harvard, Vancouver, ISO, and other styles

9

Bischoff, Jeffrey E., Mehul A. Dharia, and Danny L. Levine. "Advanced Material Modeling of UHMWPE for Orthopaedic Implant Design." In ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-175828.

Full text

Abstract:

Ultra-high molecular weight polyethylene (UHMWPE) is extensively used in orthopaedic implants, and recent constitutive modeling efforts have endeavored to rigorously capture the nonlinear, quasi-static, inelastic properties of the material. In particular, the “hybrid model” developed by Bergstrom et al. has been shown to accurately characterize the response of UHMWPE to various loading protocols including uniaxial tension to failure, cyclic uniaxial tension/compression, and small punch testing [1–2].

APA, Harvard, Vancouver, ISO, and other styles

10

Fonte, Matthew, and Anil Saigal. "Tension-Compression Asymmetry of Solid, Shape Recovered “Bulk” Nitinol." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11411.

Full text

Abstract:

As the shape memory material Nitinol (55% Nickel – 45% Titanium alloy) emerges to find more and more applications in engineered products, understanding the effects of material processing becomes increasingly important. Its mechanical behavior is highly non-linear and is strongly dependent on alloy composition, heat treatment history and mechanical work. Published Nitinol literature is almost exclusively related to processing and testing of thin wall, very small diameter tubing and wire devices, usually exhibiting superelastic characteristics. In strain-controlled tension-compression testing of pseudoelastic Nitinol shape memory wires, compression recovery forces were found to be markedly higher than tension forces. However, most experimental studies of the thermomechanical behavior of Nitinol (NiTi) to date have been conducted in uniaxial tension on wire devices. There is a dearth of information in the literature regarding the compression recovery of solid blocks of Nitinol. Questions exist on whether or not solid, “bulk” Nitinol products when deformed in compression will exhibit shape recovery characteristics? The potential for shape recovery of compressed solid blocks of Nitinol products, which could have large stress-strain outputs, can enable the design of novel devices in many industries. The motivation for this research is to provide the first characterization of the shape recovery effects of “bulk” Nitinol material under compressive deformation modes versus the often practiced and well understood tensile loading of wire and thin wall tubing.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!