Gotowe bibliografie tematyczne / Compression and Indentation testing

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Gotowa bibliografia na temat „Compression and Indentation testing”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Compression and Indentation testing"

Nakao, Yuki, Hiroyuki Yamada i Nagahisa Ogasawara. "Deformation and fracture properties of pure ice through impact indentation testing". EPJ Web of Conferences 250 (2021): 06005. http://dx.doi.org/10.1051/epjconf/202125006005.

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The deformation and fracture properties of ice have attracted considerable research interest. The tip shape of an object that comes into contact with the ice may affect the fracture phenomenon of ice, but these mechanisms have not been elucidated. In previous study, we experimentally showed that the shape of the indenter has a significant effect on pure ice deformation and fracture properties by quasi-static indentation testing. In this study, we focus on the impact fracture of pure ice to clarify the effect of strain rate on deformation and fracture phenomena. The impact indentation test was conducted using direct impact Hopkinson bar method, and a spherical indenter with a diameter of 9 mm was attached to the tip of the striking bar. The indentation rate was approximately 2.3 m/s, and the test temperature was approximately -10°C. It was clear that the maximum load of the load–displacement relationship was larger than that of the quasi-static indentation testing. This tendency was qualitatively consistent with the compressive strength of the uniaxial compression testing.

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Grujicic, M., JS Snipes i S. Ramaswami. "Multi-scale computational analysis of the nano-indentation and nano-scratch testing of Kevlar® 49 single fibers". Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 232, nr 6 (27.02.2016): 495–513. http://dx.doi.org/10.1177/1464420716635851.

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To carry out virtual nano-indentation and nano-scratch Kevlar® 49 single-fiber tests, a multi-scale computational framework has been developed and employed. Such tests are generally conducted to determine fiber local properties, as well as to provide some insight into the interaction of hard nano-particles with the fibers. The Kevlar® fabric-based soft armor is infused with these nano-particles for improved ballistic resistance, and tip geometry of the nano-indentation/-scratch probes is selected to match nano-particle size and geometry. Due to the fact that Kevlar® 49 fibers (typical diameter 12 µm) are effectively assemblies of parallel fibrils (typical diameter 100–300 nm), while atomic bond length in Kevlar® fibers is of the order of 0.2 nm, a continuum-level finite-element framework has been developed. However, to more accurately account for some of the key aspects of the fiber-material constitutive behavior, e.g. inter-fibril cohesion, the continuum-level computational analysis has been supplemented with atomic-level molecular-statics/-dynamics calculations. In good agreement with their experimental counterparts, the results obtained revealed that the extent of participation of different fibril-deformation modes (e.g. transverse compression, inter-fibril shear, axial tension, axial tensile fracture, fibrillation, axial compression, buckling and pile-up formation ahead of the nano-scratch probe, etc.) is a function of the indentation/scratch depth. Also, a relatively good agreement was obtained between the computed and experimentally measured nano-indentation forces/energies for both shallow and deep indentations, and for the nano-scratch forces/energies, but only for shorter scratch lengths. At longer scratch lengths, the “short-fiber” effects cause the computation/experiment agreement to worsen.

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Idris, Maizlinda I., Tania Vodenitcharova i Mark Hoffman. "Resistance of Thin Al Foam Panels to Deep Indentation". Materials Science Forum 561-565 (październik 2007): 357–60. http://dx.doi.org/10.4028/www.scientific.net/msf.561-565.357.

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In recent years there has been a considerable amount of research into the deformation behaviour of metallic foams. The majority of this research has only addressed size-independent bulk material properties, obtained through uniaxial compression and indentation tests of thick blocks. There is little information in the literature on the indentation response of thin panels, which has motivated the current study. Thin panels of ALPORAS closed-cell foam of ~ 0.25 g/cm3 density were tested in uniaxial compression, and were indented with long flat-plate punches and long cylindrical punches. Cross-sectioning of the samples following interrupted testing revealed the plastic strain evolution process. The deformation was attributed to the progressive crushing of the cell bands, and the combined action of shearing and tearing resistance. Based on energy formalism, a model was developed to estimate the crushing force. By fitting the experimental loaddisplacement curves, the foam ligament tearing energy was deduced for all types of indentation. The absorbed energy was also calculated for the uniaxial compression and indentation experiments.

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Dias, A. M. S., i G. C. D. Godoy. "Determination of Stress-Strain Curve through Berkovich Indentation Testing". Materials Science Forum 636-637 (styczeń 2010): 1186–93. http://dx.doi.org/10.4028/www.scientific.net/msf.636-637.1186.

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Instrumented indentation testing is a technique widely used in different materials to evaluate the penetration depth in function of the indenter load. Considering Berkovich indenter, this methodology has been used to determine mechanical properties such as hardness, Young modulus and a stress versus strain curve of the elastic-plastic behaviour under compression of the tested materials. However, the implementation of this technique to evaluate mechanical properties and also its results have still brought doubts on research areas. Nowadays, the use of a numerical methodology able to evaluate the stress and strain fields during indentation cycle can lead to a more secure interpretation. The aim of this work was to simulate the Berkovich indentation testing and to propose a methodology to extract the stress-strain curve through experimental and numerical analyses. The obtained numerical results for the load-displacement curve were quite similar to the experimental curve presented in the literature.

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SHIMIZU, Yuta, i Hiroyuki KATO. "Micro-instrumented indentation testing of plate aluminum under tension/compression load". Proceedings of Conference of Hokkaido Branch 2018.56 (2018): 312. http://dx.doi.org/10.1299/jsmehokkaido.2018.56.312.

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Affolter, Christian, Götz Thorwarth, Ariyan Arabi-Hashemi, Ulrich Müller i Bernhard Weisse. "Ductile Compressive Behavior of Biomedical Alloys". Metals 10, nr 1 (29.12.2019): 60. http://dx.doi.org/10.3390/met10010060.

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The mechanical properties of ductile metals are generally assessed by means of tensile testing. Compression testing of metal alloys is usually only applied for brittle materials, or if the available specimen size is limited (e.g., in micro indentation). In the present study a previously developed test procedure for compressive testing was applied to determine the elastic properties and the yield curves of different biomedical alloys, such as 316L (two different batches), Ti-6Al-7Nb, and Co-28Cr-6Mo. The results were compared and validated against data from tensile testing. The converted flow curves for true stress vs. logarithmic strain of the compressive samples coincided well up to the yield strength of the tensile samples. The developed compression test method was shown to be reliable and valid, and it can be applied in cases where only small material batches are available, e.g., from additive manufacturing. Nevertheless, a certain yield asymmetry was observed with one of the tested 316L stainless steel alloys and the Co-28Cr-6Mo. Possible hypotheses and explanations for this yield asymmetry are given in the discussion section.

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Cao, Li, Inchan Youn, Farshid Guilak i Lori A. Setton. "Compressive Properties of Mouse Articular Cartilage Determined in a Novel Micro-Indentation Test Method and Biphasic Finite Element Model". Journal of Biomechanical Engineering 128, nr 5 (19.04.2006): 766–71. http://dx.doi.org/10.1115/1.2246237.

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The mechanical properties of articular cartilage serve as important measures of tissue function or degeneration, and are known to change significantly with osteoarthritis. Interest in small animal and mouse models of osteoarthritis has increased as studies reveal the importance of genetic background in determining predisposition to osteoarthritis. While indentation testing provides a method of determining cartilage mechanical properties in situ, it has been of limited value in studying mouse joints due to the relatively small size of the joint and thickness of the cartilage layer. In this study, we developed a micro-indentation testing system to determine the compressive and biphasic mechanical properties of cartilage in the small joints of the mouse. A nonlinear optimization program employing a genetic algorithm for parameter estimation, combined with a biphasic finite element model of the micro-indentation test, was developed to obtain the biphasic, compressive material properties of articular cartilage. The creep response and material properties of lateral tibial plateau cartilage were obtained for wild-type mouse knee joints, by the micro-indentation testing and optimization algorithm. The newly developed genetic algorithm was found to be efficient and accurate when used with the finite element simulations for nonlinear optimization to the experimental creep data. The biphasic mechanical properties of mouse cartilage in compression (average values: Young’s modulus, 2.0MPa; Poisson’s ratio, 0.20; and hydraulic permeability, 1.1×10−16m4∕N‐s) were found to be of similar orders of magnitude as previous findings for other animal cartilages, including human, bovine, rat, and rabbit and demonstrate the utility of the new test methods. This study provides the first available data for biphasic compressive properties in mouse cartilage and suggests a promising method for detecting altered cartilage mechanics in small animal models of osteoarthritis.

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Lin, David C., Emilios K. Dimitriadis i Ferenc Horkay. "Robust Strategies for Automated AFM Force Curve Analysis—I. Non-adhesive Indentation of Soft, Inhomogeneous Materials". Journal of Biomechanical Engineering 129, nr 3 (15.11.2006): 430–40. http://dx.doi.org/10.1115/1.2720924.

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The atomic force microscope (AFM) has found wide applicability as a nanoindentation tool to measure local elastic properties of soft materials. An automated approach to the processing of AFM indentation data, namely, the extraction of Young’s modulus, is essential to realizing the high-throughput potential of the instrument as an elasticity probe for typical soft materials that exhibit inhomogeneity at microscopic scales. This paper focuses on Hertzian analysis techniques, which are applicable to linear elastic indentation. We compiled a series of synergistic strategies into an algorithm that overcomes many of the complications that have previously impeded efforts to automate the fitting of contact mechanics models to indentation data. AFM raster data sets containing up to 1024 individual force-displacement curves and macroscopic compression data were obtained from testing polyvinyl alcohol gels of known composition. Local elastic properties of tissue-engineered cartilage were also measured by the AFM. All AFM data sets were processed using customized software based on the algorithm, and the extracted values of Young’s modulus were compared to those obtained by macroscopic testing. Accuracy of the technique was verified by the good agreement between values of Young’s modulus obtained by AFM and by direct compression of the synthetic gels. Validation of robustness was achieved by successfully fitting the vastly different types of force curves generated from the indentation of tissue-engineered cartilage. For AFM indentation data that are amenable to Hertzian analysis, the method presented here minimizes subjectivity in preprocessing and allows for improved consistency and minimized user intervention. Automated, large-scale analysis of indentation data holds tremendous potential in bioengineering applications, such as high-resolution elasticity mapping of natural and artificial tissues.

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Chen, Xingyu, Yilu Zhou, Liyun Wang, Michael H. Santare, Leo Q. Wan i X. Lucas Lu. "Determining Tension–Compression Nonlinear Mechanical Properties of Articular Cartilage from Indentation Testing". Annals of Biomedical Engineering 44, nr 4 (4.08.2015): 1148–58. http://dx.doi.org/10.1007/s10439-015-1402-8.

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Lee, Moon Kyu, Kui Won Choi, Tae Soo Lee i H. N. Lim. "Evaluation of Indentation Test for Measuring Young’s Modulus of Cancellous Bone". Materials Science Forum 544-545 (maj 2007): 307–10. http://dx.doi.org/10.4028/www.scientific.net/msf.544-545.307.

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The indentation test has been in the spotlight due to easy and non-destructive testing characteristics. However, there are little studies for the indentation test of porous materials in the evaluation aspect of methodology. The goal of this study was to evaluate a spherical indentation test in the aspect of indenter-size and indentation depth by measuring elastic modulus of porous materials such as a cancellous bone using a FEM. We developed a microstructure-based FE model of cancellous bone with apparent density 0.2~0.8 g/cm3 in order to simulate uniaxial compression test and indentation test in the light of anatomical observation with a scanning electron microscope (SEM). We obtained a load-displacement curve through the indentation simulation and calculated the Young’s modulus of cancellous structure based on Pharr's hypothesis. The result indicated that indenter diameter has to be more than five times of pore size and indentation depth should be about 8% of indenter diameter at least to obtain the appropriate result of the indentation test. It is expected that this result may guide to the design and the simulation of indentation test for porous materials

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Rozprawy doktorskie na temat "Compression and Indentation testing"

Shirmohammadi, Maryam. "Process modelling and simulation of tissue damage during mechanical peeling of pumpkin as a tough skinned vegetable". Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/67921/1/Maryam_Shirmohammadi_Thesis.pdf.

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Food waste is a current challenge that both developing and developed countries face. This project applied a novel combination of available methods in Mechanical, agricultural and food engineering to address these challenges. A systematic approach was devised to investigate possibilities of reducing food waste and increasing the efficiency of industry by applying engineering concepts and theories including experimental, mathematical and computational modelling methods. This study highlights the impact of comprehensive understanding of agricultural and food material response to the mechanical operations and its direct relation to the volume of food wasted globally.

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Pour, Shahid Saeed Abadi Parisa. "Mechanical behavior of carbon nanotube forests under compressive loading". Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47699.

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Carbon nanotube (CNT) forests are an important class of nanomaterials with many potential applications due to their unique properties such as mechanical compliance, thermal and electrical conductance, etc. Their deformation and failure in compression loading is critical in any application involving contact because the deformation changes the nature of the contact and thus impacts the transfer of load, heat, and charge carriers across the interface. The micro- and nano-structure of the CNT forest can vary along their height and from sample to sample due to different growth parameters. The morphology of CNTs and their interaction contribute to their mechanical behavior with change of load distribution in the CNT forest. However, the relationship is complicated due to involvement of many factors such as density, orientation, and entanglement of CNTs. None of these effects, however, are well understood. This dissertation aims to advance the knowledge of the structure-property relation in CNT forests and find methodologies for tuning their mechanical behavior. The mechanical behavior of CNT forests grown with different methodologies is studied. Furthermore, the effects of coating and wetting of CNT forests are investigated as methods to tailor the degree of interaction between CNTs. In situ micro-indentation of uncoated CNT forests with distinct growth-induced structures are performed to elucidate the effects of change of morphology along the height of CNT forests on their deformation mechanism. CNT aerial density and tortuosity are found to dictate the location of incipient deformation along height of CNT forests. Macro-compression testing of uncoated CNT forests reveals mechanical failure of CNT forests by delamination at the CNT-growth substrate. Tensile loading of CNT roots due to post-buckling bending of CNTs is proposed to be the cause of this failure and simple bending theory is shown to estimate the failure load to be on the same order of magnitude as experimental measurements. Furthermore, delamination is observed to occur in the in situ micro-indentation of CNT forests coated with aluminum on the top surface, which demonstrates the role of the mechanical constraints within the CNT forest in the occurrence of delamination at the CNT-substrate interface. In addition, this dissertation explores the mechanical behavior of CNT forests coated conformally (from top to bottom) with alumina by atomic layer deposition. In situ micro-indentation testing demonstrates that the deformation mechanism of CNT forests does not change with a thin coating (2 nm) but does change with a sufficiently thick coating (10 nm) that causes fracturing of the hybrid nanotubes. Ex situ flat punch and Berkovich indentations reveal an increase in stiffness of the CNT forests that are in range with those predicted by compression and bending theories. An increase in the recoverability of the CNTs is also detected. Finally, solvent infiltration is proposed as a method of decreasing stiffness of CNT forests and changing the deformation mechanism from local to global deformations (i.e., buckling in the entire height). Presence of solvents between CNTs decreases the van der Waals forces between them and produces CNT forests with lower stiffness. The results demonstrate the effect of interaction between CNTs on the mechanical behavior. This dissertation reveals important information on the mechanical behavior of CNT forests as it relates to CNT morphology and tube-to-tube interactions. In addition, it provides a framework for future systematic experimental and theoretical investigations of the structure-property relationship in CNT forests, as well as a framework for tuning the properties of CNT forests for diverse applications.

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Xia, Yang. "A robust statistical method for determining material properties and indentation size effect using instrumented indentation testing". Thesis, Compiègne, 2014. http://www.theses.fr/2014COMP1982/document.

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L'indentation instrumentée est un outil pratique et puissant pour sonder les propriétés mécaniques des matériaux à petite échelle. Cependant, plusieurs erreurs (rugosité de surface, effet de taille d’indentation, la détermination de premier point de contact, etc.) affectent l'essai d’indentation instrumentée (e.g. non reproductibilité de la courbe d’indentation) et conduisent à des imprécisions dans la détermination des propriétés mécaniques des matériaux analysés. Une approche originale est développée dans cette thèse pour la caractérisation précise des propriétés mécaniques des matériaux. Cette approche fondée sur une analyse statistique des courbes d’indentation avec la prise en compte d’erreur dans la détermination du premier point de contact et des effets de la rugosité de surface. L’approche est basée sur une minimisation de la distance (défini comme l'erreur de la profondeur de contact initiale) entre l’ensemble des courbes expérimentales et celles simulées par le modèle de Bernhard de manière à générer une courbe maitresse « unique » représentative du faisceau de courbes expérimentales. La méthode proposée permet de calculer à partir de cette courbe maitresse la macro-dureté et le module d’Young du matériau en tenant compte des erreurs dues à la rugosité de surface et à l'effet de taille en indentation pour les faibles profondeurs de pénétration. La robustesse de la méthode est prouvée par son application à différents groupes d’échantillons, i.e. panels de matériaux à propriétés mécaniques diverses, différents traitements de surface (polissage, sablage) et différentes pointes d’indentation permettant de générer différents états de contraintes locaux. Une liaison quantitative entre la rugosité de surface et l'écart type de l'erreur de la profondeur de contact initiale est établie grâce à une analyse multi- échelle de la rugosité de la surface. La méthode proposée permet de caractériser les propriétés mécaniques des matériaux sans avoir recours à la préparation de surface pouvant potentiellement altérer ses propriétés (e.g. génération de contraintes résiduelles, contamination de surface…)
Instrumented indentation is a practical and powerful tool for probing the mechanical properties of materials at small scales. However, several errors (surface roughness, indentation size effect, determination of first contact point, etc…) affect the instrumented indentation testing (e.g. the low reproducibility of the indentation curves) and lead to inaccuracies in the determination of mechanical properties of materials analyzed. An original approach is developed in this thesis for the accurate characterization of the mechanical properties of materials. This approach is established by a statistical analysis of the indentation curves with taking account of error in determining the first contact point and effects of the surface roughness. This approach is basing on a minimization of the distance (defined as the initial contact depth error) between the experimental indentation curves and the ones simulated with Bernhard’s model in order to generate a “unique” representative curve which enables to represent all the experimental curves. The proposed method permits to calculate the macro-hardness and the Young’s modulus of materials from this representative curve with the consideration of the errors due to the surface roughness and the indentation size effect for shallow penetration. The robustness of the method is proved by its application to different groups of specimens, i.e. different materials with various mechanical properties, different surface preparation methods (polishing, sandblasting) and different indenter tips to generate different states of local stresses. A quantitative link between the surface roughness and the standard deviation of initial contact depth error is established by a multi-scale surface roughness analyzing. The proposed method enables to characterize the mechanical properties of materials without resorting to the surface preparation which may potentially alter its properties (e.g. generation of residual stresses, surface contamination ...)

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Koray, Erge. "Numerical And Experimental Analysis Of Indentation". Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12605953/index.pdf.

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Indentation tests are widely used with simultaneous measurements of indentation depth and force especially for determining material properties. In this study
numerical and experimental investigation of the force-indentation measurements is presented. For indentation tests on anisotropic metals, a novel indenter which is not self similar is used with three transducers to measure the displacements. It is seen that in order to have high repeatability and accuracy at the tests, workpiece and indenter parameters have crucial importance. These parameters in the indentations are analyzed by finite element methods. Ideal dimensions of the workpiece are determined. It is shown that plane strain conditions can only be achieved by embedded indentations. Effect of surface quality and clamping on repeatability are investigated. It is shown that surface treatments have significant effects on the results. Also it is seen that clamping increases the repeatability drastically. Moreover, indentation tests are conducted to verify the results of numerical simulations. Effect of anisotropy on the force-displacement curves is clearly observed.

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Dhaigude, Mayuresh Mukund. "Anvil effect in spherical indentation testing on sheet metal". [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1818.

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Vadlakonda, Suman. "Indentation induced deformation in metallic materials". Thesis, University of North Texas, 2005. https://digital.library.unt.edu/ark:/67531/metadc4904/.

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Nanoindentation has brought in many features of research over the past decade. This novel technique is capable of producing insights into the small ranges of deformation. This special point has brought a lot of focus in understanding the deformation behavior under the indenter. Nickel, iron, tungsten and copper-niobium alloy system were considered for a surface deformation study. All the samples exhibited a spectrum of residual deformation. The change in behavior with indentation and the materials responses to deformation at low and high loads is addressed in this study. A study on indenter geometry, which has a huge influence on the contact area and subsequently the hardness and modulus value, has been attempted. Deformation mechanisms that govern the plastic flow in materials at low loads of indentation and their sensitivity to the rate of strain imparted has been studied. A transition to elastic, plastic kind of a tendency to an elasto-plastic tendency was seen with an increase in the strain rate. All samples exhibited the same kind of behavior and a special focus is drawn in comparing the FCC nickel with BCC tungsten and iron where the persistence of the elastic, plastic response was addressed. However there is no absolute reason for the inconsistencies in the mechanical properties observed in preliminary testing, more insights can be provided with advanced microscopy techniques where the study can be focused more to understand the deformation behavior under the indenter. These experiments demonstrate that there is a wealth of information in the initial stages of indentation and has led to much more insights into the incipient stages of plasticity.

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Hong, Edwin S. "Group testing for image compression /". Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/6900.

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Wang, Yan, i 王焱. "Hertzian indentation failure of dental restorative materials". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B36528067.

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Tuck, Jonathan R. "Indentation characterisation for design of coated systems". Thesis, University of Newcastle Upon Tyne, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364800.

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Monelli, Bernardo Disma. "Mechanical Characterization of Metallic Materials by Instrumented Spherical Indentation Testing". Doctoral thesis, Università degli studi di Trento, 2010. https://hdl.handle.net/11572/368675.

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Instrumented indentation testing is now considered one of the most attractive tools for characterizing engineering materials. A large number of materials properties can be investigated. The present dissertation was aimed at developing a new methodology for inferring the material behaviour of metallic materials from their indentation response.

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Książki na temat "Compression and Indentation testing"

Argatov, Ivan, i Gennady Mishuris. Indentation Testing of Biological Materials. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78533-2.

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Hansen, L. A. Compression testing of geomembrane soil interfaces. Litteton, CO: Society of Mining Engineers, Inc, 1987.

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J, Douglas M., i George C. Marshall Space Flight Center., red. A comparison of quasi-static indentation to low-velocity impact. MSFC, AL: National Aeronautics and Space Administration, Marshall Space Flight Center, 2000.

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International Workshop on Instrumented Indentation (1995 San Diego, Calif.). Conference proceedings: International Workshop on Instrumented Indentation, San Diego, CA, April 22-23, 1995. Redaktorzy Smith Douglas 1954-, University of California, San Diego. Institute for Mechanics and Materials. i Standard Reference Materials Program (National Institute of Standards and Technology (U.S.)). Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1996.

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Canadian Society of Civil Engineers., red. An investigation on the value of the indentation test for steel rails. [S.l: s.n., 1991.

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W, Hyer M., Shuart Mark J i United States. National Aeronautics and Space Administration., red. Compression failure of angle-ply laminates. Blacksburg, Va: College of Engineering, Virginia Polytechnic Institute and State University, 1991.

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Cruse, Thomas A. Mechanical testing of advanced coating system: Final report. [San Antonio, Tex.]: Southwest Research Institute, 1990.

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Dutta, Piyush K. High-strain-rate tensile behavior of sedimentary and igneous rocks at low temperatures. [Hanover, N.H.]: U.S. Army Corps of Engineers, Cold Regions Research & Engineering Laboratory, 1993.

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Iravani, Said. High performance concrete under high sustained compressive stresses. Edmonton, Alta., Canada: Dept. of Civil Engineering, University of Alberta, 1994.

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C, Rogers A., i United States. National Aeronautics and Space Administration., red. Compression mass gauge testing in a liquid hydrogen dewar. [Washington, D.C.?]: National Aeronautics and Space Administration, 1995.

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Części książek na temat "Compression and Indentation testing"

Gdoutos, Emmanuel E. "Indentation Testing". W Solid Mechanics and Its Applications, 269–83. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-89466-5_14.

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Gooch, Jan W. "Compression Testing". W Encyclopedic Dictionary of Polymers, 163. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_2777.

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Wang, Qiang, i Mark R. Daymond. "Back-Calculated Indentation Stress-Strain Curves from Small Scale Testing and Verification Using Finite Element Models: Application to Nanoindentation and Micropillar Compression Study of a Heavy Ion Irradiated Zr-2.5Nb Alloy". W Zirconium in the Nuclear Industry: 19th International Symposium, 294–318. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2021. http://dx.doi.org/10.1520/stp162220190043.

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Argatov, Ivan, i Gennady Mishuris. "Axisymmetric Frictionless Indentation of a Transversely Isotropic Elastic Half-Space". W Indentation Testing of Biological Materials, 1–27. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78533-2_1.

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Argatov, Ivan, i Gennady Mishuris. "Indentation of a Viscoelastic Half-Space". W Indentation Testing of Biological Materials, 231–83. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78533-2_10.

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Argatov, Ivan, i Gennady Mishuris. "Indentation of a Poroelastic/Biphasic Half-Space". W Indentation Testing of Biological Materials, 285–321. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78533-2_11.

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Argatov, Ivan, i Gennady Mishuris. "Indentation of an Anisotropic Elastic Half-Space". W Indentation Testing of Biological Materials, 323–71. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78533-2_12.

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Argatov, Ivan, i Gennady Mishuris. "Non-axisymmetric Frictionless Indentation of a Transversely Isotropic Elastic Half-Space". W Indentation Testing of Biological Materials, 29–51. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78533-2_2.

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Argatov, Ivan, i Gennady Mishuris. "Pipette Aspiration of an Elastic Half-Space". W Indentation Testing of Biological Materials, 53–87. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78533-2_3.

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Argatov, Ivan, i Gennady Mishuris. "Surface Stretch of an Elastic Half-Space Under Indentation". W Indentation Testing of Biological Materials, 89–105. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78533-2_4.

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Streszczenia konferencji na temat "Compression and Indentation testing"

Fortin, M., J. Soulhat, A. Shirazi-Adl, E. B. Hunziker i M. D. Buschmann. "Dynamic and Transient Nonlinear Behavior of Articular Cartilage in Unconfined Compression". W ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0297.

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Abstract Functional mechanical behavior of cartilage can be investigated by testing excised tissue in confined, unconfined or indentation geometries using creep, stress relaxation and dynamic sinusoidal tests. Potential nonlinear behavior of cartilage has been mostly characterized in confined compression [1,2]. The extent to which the nonlinearities are intrinsic to the tissue or depend on the specificities of the testing configuration of confined compression is not known. We have therefore performed experimental and analytical tests of articular cartilage in unconfined compression to reveal linear and nonlinear behavior. We found equilibrium stress responses to behave linearly, but transient or dynamic stress responses to be nonlinear. Transient compressive responses stiffened nonlinearly when increasing the static offset compression present at the beginning of the step. On the contrary, dynamic stiffness decreased (weakened) nonlinearly when the amplitude of sinusoidal displacement, imposed on a static offset, was increased. We also found that the articular cartilage nonlinearly maintained a compressive stress when a release displacement was applied from a 10% static offset compression, suggesting possible physiological roles of these nonlinear behaviors.

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Pottle, Jonathan E., i J. K. Francis Suh. "An in Situ Dual Indentation and Optimization Method to Determine Mechanical Properties of Articular Cartilage". W ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-176601.

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The efficacy of the biphasic poroviscoelastic (BPVE) theory [1] in constitutive modeling of articular cartilage biomechanics is well-established [2–4]. Indeed, this model has been used to simultaneously predict stress relaxation force across confined compression, unconfined compression, and indentation protocols [2,3]. Previous works have also demonstrated success in simultaneously curve-fitting the BPVE model to reaction force and lateral deformation data gathered from stress relaxation tests of articular cartilage in unconfined compression [4]. However, a potential limitation of practical applications of such a successful model is seen in some commonly-employed mechanical testing methods for articular cartilage, such as confined compression and unconfined compression. These methods require the excision of a disk of cartilage from its underlying subchondral base, which likely would compromise the structural integrity of the tissue, causing swelling and curling artifacts of the sample [5]. Indentation represents a testing protocol that can be used with an intact cartilage layer. This results in a specimen more closely resembling cartilage in vivo. Using an agarose gel construct, our previous study [6] has demonstrated that a unique set of the six BPVE model parameters of a soft tissue can be determined readily from in situ dual indentation method using stress relaxation and creep viscoelastic protocols. The objective of the current study is to validate the efficacy of this technique as a means to determine the BPVE material parameters of articular cartilage.

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Kepich, Eugene T., i Roger C. Haut. "On the Indentation Testing of Articular Cartilage: Determination of the Effective Poisson’s Ratio Using Two Different-Sized Punches". W ASME 2008 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2008. http://dx.doi.org/10.1115/sbc2008-193257.

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Effective Poisson’s ratio (EPR) of articular cartilage in compression is an important parameter, which is inversely correlated with stiffness of the collagen fibers [1]; and thus, if known, could provide valuable information about integrity of the collagen network in the tissue. Unfortunately, direct determination of the EPR by measuring lateral expansion during unconfined compression tests [2], while being effective, due to it’s destructive nature many times is not desired and/or hard to apply in practice. Optically-determined values of equilibrium EPR for bovine humeral articular cartilage using this method are reported to be in range 0.185±0.0065.

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Prakash, Raghu V., Krishna Madhavan, Anirudh R. Prakash i Pankaj Dhaka. "Localized Fatigue Response Evaluation of Weld Regions Through Cyclic Indentation Studies". W ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86420.

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An experimental investigation of the fatigue response of commonly used structural stainless steel — SS 304 L(N) and SS 316 L(N) — and its weld was carried out through automated cyclic ball indentation (ABI). A Tungsten Carbide (WC) spherical ball indenter of 1.57 mm diameter was used for compression-compression fatigue testing of the specimen under load control at a low frequency of loading (typically 0.1 Hz to 1 Hz). The force-displacement response during fatigue loading was logged continuously during fatigue test and the data was analyzed to extract details such as variations in: total depth of penetration, loading and unloading slopes, loading/unloading intercept, displacement range as a function of number of cycles. From the results, one could identify an unsteady response of material during cyclic loading after some cycles of fatigue loading — typical of failure; this input was used to compare the fatigue response of different zones of the weld. Even though the applied frequency of loading is relatively less (∼ 1 Hz), due to the high levels of plastic deformation that is developed during the indentation process, one could expect an effect of strain rate on the fatigue response during cyclic ball indentation. To verify this, experiments were carried out at three distinct frequencies of 0.1 Hz, 0.5 Hz and 1 Hz for a given loading condition. Further, it was observed that the material response in weld region is the best, followed by the base metal. This can be corroborated with the weld microstructure that is obtained as a consequence of processing. Frequency of loading did not have significant influence on the fatigue failure life. Numerical simulation of cyclic ball indentation was carried out to extract some relevant parameters for failure life such as mean stress and local stress ratio. This will serve as input to correlation of failure life data obtained from conventional specimens.

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Xie, Xiyang, Laura Edvardsen, Cathrine Ringstad i Pierre Cerasi. "Creep Indentation Test and Lab-Based Simulation on Pierre II Shale". W 56th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2022. http://dx.doi.org/10.56952/arma-2022-0478.

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ABSTRACT: Can we find proper lab testing sources rather than coring samples? We rest our hope on drilling cuttings. The cutting sample might be too small to be tested in Laboratory, but the indentation test looks like a promising solution. In this study, the indentation tests are implemented on Pierre II shale and the corresponding numerical simulation is performed. In the indentation test, an alloyed indenter presses on the surface of a shale sample with the loading, holding, and unloading stage. Simulation with FLAC3D is then implemented to fit the lab results well. Then a series of parametric analyses show how the constitutive parameters affect the testing curve. From the simulation results, we have illustrated that an indentation test is an option on cutting samples. This study provides a workflow to analyze the mechanical behavior of small rock samples with the indentation test experimentally and numerically. 1. INTRODUCTION In petroleum engineering, coring samples, as first-hand sources, are direct sources providing formation mechanical information. On the other hand, the cost and the time consumption restrict coring operation. Can we find other sources instead of coring samples? Drilling cuttings might be the answer. Cuttings are the formation rock as well but in small size. The cutting sample could be too small to be tested, for example, not suitable for the triaxial compressive test. The indentation test draws our attention since it requires a small indenter-rock-contacting surface, which means the testing samples can be small too. In this study, the indentation tests are implemented on Pierre II shale and the corresponding numerical simulation is performed. In this study, an indenter (sphere-shaped, 1-mm-diameter) presses on the surface of a shale sample with a certain depth of indentation (the loading stage). Two scenarios can be chosen at the maximum depth: i. the indenter is retrieved back immediately (unloading stage), or ii. the indenter is fixed at the position for a duration (holding stage). The curve of force-depth is obtained from the unloading stage, which is used to explain the elastic behavior of the sample. The force-time curve is obtained from the holding stage, which is used to analyze the creep behavior (viscoelasticity) of the sample. The loading stage can be used to analyze the elastoplastic behavior.

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Habib, Kashfi B., Rocky S. Taylor, Ian J. Jordaan i Stephen Bruneau. "Experimental Investigation of Compressive Failure of Truncated Conical Ice Specimens". W ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-24184.

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A series of small-scale ice indentation tests has been carried out to study the compressive failure of polycrystalline ice during indentation and explore the link between various parameters that influence the ice failure processes. In total, twenty-eight experiments were completed using ice specimens having a truncated conical geometry to investigate the nature of crushing, spalling and high pressure zones. Variables considered in this series include: grain size, indenter shape, indentation rate, temperature, and taper angle. Two grain size ranges (0–4 mm and 4–10+ mm) were considered, along with two indenter shapes (a flat plate and a spherical indenter). Indentation rates of 0.1 mm/s, 1 mm/s and 10 mm/s have been used for these tests. Experiments were conducted at temperatures of −10°C and −5°C and three geometric configurations (with taper angles of 13°, 21°, 30°) have been considered. Crushing and spalling events have been observed from the regular and high-speed videos, synchronized with tactile pressure sensor data and load cell data. To observe the microstructural modification, horizontal and vertical thin-sections of the damaged ice adjacent to the indenter have been collected and examined. Ice particles were collected from the testing area following each experiment to observe the influence of different factors. Particle size distributions and post-experiment image analyses were also conducted after each test. The effect of the variables on observed failure processes and associated loads are discussed.

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Sirimamilla, Pavana, Ahmet Erdemir, Antonie J. van den Bogert i Jason P. Halloran. "An Elaborate Data Set for Mechanical Characterization of the Foot". W ASME 2008 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2008. http://dx.doi.org/10.1115/sbc2008-192867.

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Experimental testing of cadaver specimens is a useful means to quantify structural and material response of tissue and passive joint properties against applied loading[1,4]. Very often, specific material response (i.e., stress-strain behavior of a ligament or plantar tissue) has been the goal of experimental testing and is accomplished with uniaxial and/or biaxial tests of prepared tissue specimens with uniform geometries[2,5]. Material properties can then be calculated directly and if testing data involves individual sets of multiple loading modes (e.g. compression only, shear only, volumetric) an accurate representation of the global response of the specimen may be possible. In foot biomechanics, however, it is practically impossible to perform isolated mechanical testing in this manner. The structural response, therefore the stiffness characteristics, of the foot have been quantified, usually using a dominant loading mode: e.g., whole foot compression [6], heel pad indentation [3]. This approach ignores the complexity of most in vivo loading conditions, in which whole foot deformation involves interactions between compression, shear (e.g. heel pad) and tension (e.g. ligaments). Therefore, the purpose of this study was to quantify the mechanical response of a cadaver foot specimen subjected to compression and anterior-posterior (AP) shear loading of isolated heel and forefoot regions as well as whole foot compression. Results from the experimental tests represent a novel methodology to quantify a complete structural biomechanical response. Combined with medical imaging, followed by inverse finite element (FE) analysis, the data may also serve for material characterization of foot tissue.

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Spitsen, R., D. Kim, B. Flinn, M. Ramulu i E. T. Easterbrook. "The Effects of Post-Weld Cold Working Processes on the Fatigue Strength of Low Carbon Steel Resistance Spot Welds". W ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59759.

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The investigation on the use of a post-weld cold working process to improve fatigue strength of low carbon steel resistance spot welds is presented. The cold working process generates uniform and consistent large zones of compressive residual stresses in resistance spot-welded low carbon steel structures using a specially designed indentation device. The effect of the indentation process parameters on the mechanical properties of the resistance spot-weld was investigated. Comparisons of the mechanical properties and qualitative results between the as-resistance spot-welded specimens and the post-weld cold worked resistance spot-welded specimens have been made in this investigation. Fatigue testing was also conducted to evaluate the effect of post-weld cold working process on the fatigue characteristics of resistance spot welds. Preliminary results showed that a significant improvement in the fatigue endurance limit has been achieved through the post-weld cold working process.

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Hoffelner, Wolfgang, Manuel Pouchon, Maria Samaras, Annick Froideval i Jiachao Chen. "Condition Monitoring of High Temperature Components With Sub-Sized Samples". W Fourth International Topical Meeting on High Temperature Reactor Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/htr2008-58195.

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Advanced nuclear plants are designed for long-term operation in quite demanding environments. Limited operation experience with the materials used in such plants necessitate a reliable assessment of damage and residual life of components. Non-destructive condition monitoring of damage is difficult, if not impossible for many materials. Periodic investigation of small samples taken from well defined locations in the plant could provide an attractive tool for damage assessments. This paper will discuss possibilities of using very small samples taken from plant locations for complementary condition monitoring. Techniques such as micro/nano-indentation, micropillar compression, micro bending, small punch and thin strip testing can be used for the determination of local mechanical properties. Advanced preparation techniques such as focused ion beam (FIB) allow the preparation of samples from these small volumes for micro-structural analyses with transmission electron microscope (TEM) and advanced X-ray synchrotron techniques. Modeling techniques (e.g. dislocation dynamics DD) can provide a quantitative link between microstructure and mechanical properties. Using examples from ferritic oxide dispersion strengthened materials the DD approach is highlighted to understand component life assessments.

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Hernandez, C., A. Maranon, I. A. Ashcroft i J. P. Casas-Rodriguez. "Quasi-Static and Dynamic Characterization of Oil-Based Modeling Clay and Numerical Simulation of Drop-Impact Test". W ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63883.

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Numerical simulations require the determination of material constants associated to a given mathematical material model that accurately represents its mechanical behavior. Furthermore, for dynamic models, the characterization process should be accomplished at high strain rates since the mechanical properties of some materials are influenced by the rate of loading. This pressure-dependant behavior is commonly seen in paste-like materials such as oil-based modeling clay. This material, is widely used as simulating a material for analyzing metal forming processes, in impact applications as soft body impactor, or as backing material in ballistic resistance testing of body armors. There are many techniques used for characterizing these kinds of pastelike materials. Traditional quasi-static tests, such as compression or indentation, are the most commonly used, although, high strain rate techniques, such as the drop-impact test, are also used when dynamic properties are required. This paper presents the mechanical characterization of an oil-based modeling clay by two different techniques: quasi-static and a high strain rate technique. The results of a traditional quasi-static method, using compression tests, are compared with the constants determined by a proposed high strain rate characterization procedure that uses as input a single drop-impact test. Both sets of material constants are implemented in a numerical simulation that uses the power law plasticity material model. Drop impact numerical simulations and their verification against experimental results were performed to compare the accuracy of both sets of material constants and the suitability of the characterization techniques. Results illustrate that the proposed high strain rate characterization technique show advantages in the determination of the materials constants for the numerical simulation of dynamic events.

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Raporty organizacyjne na temat "Compression and Indentation testing"

Schneider, J. A., K. F. McCarty, J. R. Heffelfinger i N. R. Moody. Practical limitations to indentation testing of thin films. Office of Scientific and Technical Information (OSTI), listopad 1998. http://dx.doi.org/10.2172/663560.

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Nyberg, Eric A., Vineet V. Joshi, Curt A. Lavender i Douglas Burkes. Summary of Compression Testing of U-10Mo. Office of Scientific and Technical Information (OSTI), październik 2012. http://dx.doi.org/10.2172/1111252.

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Joe Williams, Michael Aarnio, Kirk Lupkes i Sabri Deniz. Design and Testing of CO2 Compression Using Supersonic Shockware Technology. Office of Scientific and Technical Information (OSTI), sierpień 2010. http://dx.doi.org/10.2172/992587.

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Thompson, Darla Graff, Caitlin Savanna Woznick i Racci DeLuca. Spherical Platen versus Flat Platens in Compression Testing of PBX 9502. Office of Scientific and Technical Information (OSTI), wrzesień 2019. http://dx.doi.org/10.2172/1569605.

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Bartkowski, Peter, i Paul Berning. Design and Testing of the ARL Squeeze 4 Helical Flux Compression Generator. Fort Belvoir, VA: Defense Technical Information Center, czerwiec 2013. http://dx.doi.org/10.21236/ada589133.

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Billone, M. C., T. A. Burtseva, J. P. Dobrzynski, D. P. McGann, K. Bryne, Z. Han i Y. Y. Liu. Used Fuel Disposition Campaign Phase I Ring Compression Testing of High-Burnup Cladding. Office of Scientific and Technical Information (OSTI), marzec 2013. http://dx.doi.org/10.2172/1086456.

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Koopman, Aaron. Design and Testing of CO₂ Compression Using Supersonic Shock Wave Technology. Office of Scientific and Technical Information (OSTI), czerwiec 2015. http://dx.doi.org/10.2172/1253144.

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Billone, M. C., T. A. Burtseva i Y. Y. Liu. Used Fuel Disposition Campaign - Baseline Studies for Ring Compression Testing of High-Burnup Fuel Cladding. Office of Scientific and Technical Information (OSTI), listopad 2012. http://dx.doi.org/10.2172/1121037.

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William C. Leighty. Proof-of-Concept Manufacturing and Testing of Composite Wind Generator Blades Made by HCBMP (High Compression Bladder Molded Prepreg). Office of Scientific and Technical Information (OSTI), październik 2005. http://dx.doi.org/10.2172/859303.

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Mataya, M. C., i V. E. Sackschewsky. Effect of internal heating during hot compression testing on the stress-strain behavior and hot working characteristics of Alloy 304L. Office of Scientific and Technical Information (OSTI), maj 1993. http://dx.doi.org/10.2172/10158815.

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