Готові списки джерел за темами / Material Properties Determination

Добірка наукової літератури з теми "Material Properties Determination"

Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "Material Properties Determination"

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Dzugan, Jan, and Pavel Konopik. "OS15F059 SMALL PUNCH TEST APPLICATION TO MATERIAL PROPERTIES EVOLUTION DETERMINATION." Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2011.10 (2011): _OS15F059——_OS15F059—. http://dx.doi.org/10.1299/jsmeatem.2011.10._os15f059-.

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Dzugan, Jan, and Pavel Konopik. "OS15-3-1 SMALL PUNCH TEST APPLICATION TO MATERIAL PROPERTIES EVOLUTION DETERMINATION." Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2011.10 (2011): _OS15–3–1—. http://dx.doi.org/10.1299/jsmeatem.2011.10._os15-3-1-.

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3

Paschalis, Eleftherios P., Klaus Klaushofer, and Markus A. Hartmann. "Material properties and osteoporosis." F1000Research 8 (August 22, 2019): 1481. http://dx.doi.org/10.12688/f1000research.18239.1.

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The main clinical tool for the diagnosis and treatment of skeletal diseases such as osteoporosis is the determination of bone mineral density by dual x-ray absorptiometry. Although this outcome contributes to the determination of bone strength, the clinical evidence to date suggests that it does not correlate strongly with fracture incidence. The main reason for this discrepancy is the fact that several other bone properties, such as material properties, are not taken into account. This short review summarizes the reasons why material properties are important in the determination of bone strength and briefly discusses some of them as well as their influence on bone’s mechanical performance.
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4

Elsenheimer, D., and P. Groche. "Determination of material properties for hot hydroforming." Production Engineering 3, no. 2 (April 15, 2009): 165–74. http://dx.doi.org/10.1007/s11740-009-0156-2.

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Aguiar, Adair R., and Alan B. Seitenfuss. "Determination of material properties of a linearly elastic peridynamic material." Mathematics and Mechanics of Solids 27, no. 6 (November 23, 2021): 1069–91. http://dx.doi.org/10.1177/10812865211051406.

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We investigate the properties of an isotropic linear elastic peridynamic material in the context of a three-dimensional state-based peridynamic theory, which considers both length and relative angle changes, and is based on a free energy function proposed in previous work that contains four material constants. To this end, we consider a class of equilibrium problems in mechanics to show that, in interior points of the body where deformations are smooth, the corresponding solutions in classical linear elasticity are also equilibrium solutions in peridynamics. More generally, we show that the equations of equilibrium are satisfied even when two of the four peridynamic constants are arbitrary. Pure torsion of a cylindrical shaft and pure bending of a cylindrical beam are particular cases of this class of problems and are used together with a correspondence argument proposed elsewhere to determine these two constants in terms of the elasticity constants of an isotropic material from the classical linear elasticity. One of the constants has a singularity in the Poisson ratio, which needs further investigation. Two additional experiments concerning bending of cylindrical beam by terminal load and anti-plane shear of a hollow cylinder, which do not belong to the previous class of problems, are used to validate these results.
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Vogel, D., R. Ku¨hnert, M. Dost, and B. Michel. "Determination of Packaging Material Properties Utilizing Image Correlation Techniques." Journal of Electronic Packaging 124, no. 4 (December 1, 2002): 345–51. http://dx.doi.org/10.1115/1.1506698.

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Thermo-mechanical reliability in advanced electronic packaging requires new materials testing approaches. The necessary understanding of the impact of very local material stressing on component reliability leads to the need of materials testing and characterization on microscopic scale. For example, defect initiation and propagation in multilayer structures as in WLP and flip chip technology, the influence of material migration to mechanical behavior or defect development in ultra-thin silicon dies often are not well understood. A key for micro materials testing and characterization is the measurement of strains and displacements inside microscopic regions. Correlation techniques (e.g., microDAC, nanoDAC) are one of the promising tools for that purpose. Their application potentials to micro testing for electronic packaging materials are demonstrated in the paper. More in detail, CTE measurement and crack testing are discussed. First attempts for testing under AFM conditions and their results are considered.
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Čačko, Viliam, Iveta Onderová, Ľubomír Šooš, Pavol Varga, and Andrej Smelík. "Experimental Determination of Mechanical Properties of Waste Steel Sheets." Materials Science Forum 994 (May 2020): 62–69. http://dx.doi.org/10.4028/www.scientific.net/msf.994.62.

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The paper is primarily focused on the determination of the ultimate strength of pressed materials in the form of steel sheets. The breaking strength of homogeneous materials such as e.g. steel sheet is not a relevant indication for pressed steel sheet waste material. The ultimate strength serves as a main parameter in the design of sheet metal cutting machines. For the design and technological design of machines and equipment for shearing steel waste in the form of pressed sheets, it is necessary to know the limit strength of the material. The paper describes in detail the experimental procedure and the principle of determining the ultimate strength of the steel waste sheet. Several dozen experimental samples of pressed metal waste were used. The very principle of the experiment consisted of sheared samples, while monitoring the shear force and the thickness of the pressed material. The ultimate strength of the shear material was calculated from the measured data. The measured and calculated data were statistically processed to increase the objectivity of the determination of the already mentioned ultimate strength parameter of the pressed waste sheets.
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Hlaváčová, Z. "Low frequency electric properties utilization in agriculture and food treatment." Research in Agricultural Engineering 49, No. 4 (February 8, 2012): 125–36. http://dx.doi.org/10.17221/4963-rae.

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Determination of electrical properties is utilized in a wide range of disciplines and industries. A brief compendium of agricultural materials and food electrical properties exploitation is presented in this paper. The measurement of electrical conductivity or resistivity can be utilized at investigation of cell membrane properties on microscopic level. Moreover the electrical conductivity have utilization at the salinity of soils and irrigation water determination. Biological material properties are determined from their leachates too. The conductivity measurement are applied for determination of various characteristics of agricultural materials and food, for example for determination of the frost sensitiveness, of chilling and freezing tolerance, of moisture content, of seeds germination, of mechanical stress, of pasteurization, of other properties of grains, seeds, meat, sugar, milk, wood, soil, fruit and vegetable, infected food, … The utilization of dielectric properties are also described; for example in agricultural materials and food quality sensing (moisture content, maturity of fruit, freshness of eggs, potential insect control in seeds, radio frequency heating, …). The classification of permittivity measurement techniques at the low frequencies is mentioned.
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Zhou, Huan-Xiang. "Determination of Condensate Material Properties from Droplet Deformation." Journal of Physical Chemistry B 124, no. 38 (August 28, 2020): 8372–79. http://dx.doi.org/10.1021/acs.jpcb.0c06230.

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Džugan, Jan, Pavel Konopík, Radek Procházka, and Zuzanka Trojanová. "SPD Processed Materials Mechanical Properties Determination with the Use of Miniature Specimens." Materials Science Forum 879 (November 2016): 471–76. http://dx.doi.org/10.4028/www.scientific.net/msf.879.471.

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The main reason why new technologies and treatment procedure are being developed is to attain special mechanical properties. However, these developments are nowadays done on a small material volume either using some laboratory simulators, applying sever plastic deformation procedures or chemical composition screening for multicomponent alloys development by laser or electron beam melting. In all these application a small volume of the material assessed is available and standard procedures for crucial mechanical properties determinations are not applicable. Thus small size techniques should be applied. There has been extensively used small punch test technique (SPT) for those cases in recent years. This technique is mainly based on the evaluation using correlation between standard and SPT tests for considered material. In cases when insufficient material volume is available, those correlations cannot be established and thus comparative evaluation only can be carried out. This kind of evaluation is insufficient for the contemporary purposes, when full material potential is to be utilized. Therefore, procedures providing results directly comparable with standard specimens are being developed. Fundamental properties are those determined from tensile tests. The current paper is presenting application of developed miniature tensile test specimen method to materials after SPD processes. Quasi static properties determination is shown here for Magnesium and Titanium alloys for ECAP and Rotary Swaging SPD techniques. The results obtained from testing can be used not only for a direct material properties assessment and comparison, but also as input data for FEM codes, significantly increasing the materials considered application potential assessment.
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Дисертації з теми "Material Properties Determination"

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Vogt, Thomas Karl. "Determination of material properties using guided waves." Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273280.

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Xavier, Angela Marie. "Determination of the Material Properties of the Pediatric Rib." The Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1392019115.

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Steinhaus, Thomas. "Determination of intrinsic material flammability properties from material tests assisted by numerical modelling." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/3273.

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Computational Fluid Dynamics (CFD) codes are being increasingly used in the field of fire safety engineering. They provide, amongst other things, velocity, species and heat flux distributions throughout the computational domain. The various sub-models associated with these have been developed sufficiently to reduce the errors below 10%-15%, and work continues on reducing these errors yet further. However, the uncertainties introduced by using material properties as an input for these models are considerably larger than those from the other sub-models, yet little work is being done to improve these. Most of the data for these material properties comes from traditional (standard) tests. It is known that these properties are not intrinsic, but are test-specific. Thus, it can be expected that the errors incurred when using these in computations can be significant. Research has been held back by a lack of understanding of the basic factors that determine material flammability. The term “flammability” is currently used to encompass a number of definitions and “properties” that are linked to standardised test methodologies. In almost all cases, the quantitative manifestations of “flammability” are a combination of material properties and environmental conditions associated with the particular test method from which they were derived but are not always representative of parameters linked intrinsically with the tested material. The result is that even the best-defined parameters associated with flammability cannot be successfully introduced into fire models to predict ignition or fire growth. The aim of this work is to develop a new approach to the interpretation of standard flammability tests in order to derive the (intrinsic) material properties; specifically, those properties controlling ignition. This approach combines solid phase and gas modelling together with standard tests using computational fluid dynamics (CFD), mass fraction of flammable gases and lean flammability limits (LFL). The back boundary condition is also better defined by introducing a heat sink with a high thermal conductivity and a temperature dependant convective heat transfer coefficient. The intrinsic material properties can then be used to rank materials based on their susceptibility to ignition and, furthermore, can be used as input data for fire models. Experiments in a standard test apparatus (FPA) were performed and the resulting data fitted to a complex pyrolysis model to estimate the (intrinsic) material properties. With these properties, it should be possible to model the heating process, pyrolysis, ignition and related material behaviour for any adequately defined heating scenario. This was achieved, within bounds, during validation of the approach in the Cone Calorimeter and under ramped heating conditions in the Fire Propagation Apparatus (FPA). This work demonstrates that standard flammability and material tests have been proven inadequate for the purpose of obtaining the “intrinsic” material properties required for pyrolysis models. A significant step has been made towards the development of a technique to obtain these material properties using test apparatuses, and to predict ignition of the tested materials under any heating scenario. This work has successfully demonstrated the ability to predict the driving force (in-depth temperature distribution) in the ignition process. The results obtained are very promising and serve to demonstrate the feasibility of the methodology. The essential outcomes are the “lessons learnt”, which themselves are of great importance to the understanding and further development of this technique. One of these lessons is that complex modelling in conjunction with current standard flammability test cannot currently provide all required parameters. The uncertainty of the results is significantly reduced when using independently determined parameters in the model. The intrinsic values of the material properties depend significantly on the accuracy of the model and precision of the data.
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Karlsson, Patrik. "Determination of viscoelastic properties of adhesives." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-35521.

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A research project at Linnaeus University focuses on optimizing theadhesives joints between wood and glass, with the aim of obtain stiffcomponents that can act as a load and stabilizing elements and still betransparent. But there is, however, still a lack of knowledge regarding theadhesive materials which need to be further investigated. This thesis focused on testing six different adhesives in relaxation and todetermine the viscosity (η) and modulus of elastic (MOE, E). Viscosity andMOE are then used in combination in a standard linear solid model (SLS)describing the viscoelasticity mathematically. Figures and tables are used topresent the results and the evaluation. The so determined parameters can beused in e.g. finite element models for the design of load bearing timber glasscomposites.
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Kang, JiJun. "Determination of elastic-plastic and visco-plastic material properties from instrumented indentation curves." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13509/.

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Instrumented indentation techniques at micro or nano-scales have become more popular for determining mechanical properties from small samples of material. These techniques can be used not only to obtain and to interpret the hardness of the material but also to provide information about the near surface mechanical properties and deformation behaviour of bulk solids and/or coating films. In particular, various approaches have been proposed to evaluate the elastic-plastic properties of power-law materials from the experimental loading-unloading curves. In order to obtain a unique set of elastic-plastic properties, many researchers have proposed to use more than one set of loading-unloading curves obtained from different indenter geometries. A combined Finite Element (FE) analysis and optimisation approach has been developed, using three types of indenters (namely, conical, Berkovich and Vickers), for determining the elastic-plastic material properties, using one set of ‘simulated’ target FE loading-unloading curves and one set of real-life experimental loading-unloading curves. The results obtained have demonstrated that excellent convergence can be achieved with the ‘simulated’ target FE loading-unloading curve, but less accurate results have been obtained with the real-life experimental loading-unloading curve. This combined technique has been extended to determine the elastic and visco-plastic material properties using only a single indentation ‘simulated’ loading-unloading curve based on a two-layer viscoplasticity model. A combined dimensional analysis and optimisation approach has also been developed and used to determine the elastic-plastic material properties from loading-unloading curves with single and dual indenters. The dimensional functions have been established based on a parametric study using FE analyses and the loading and linearised unloading portions of the indentation curves. It has been demonstrated that the elastic-plastic material properties cannot be uniquely determined by the test curves of a single indenter, but the unique or more accurate results can be obtained using the test curves from dual indenters. Since the characteristic loading-unloading responses of indenters can be approximated by the results of dimensional analysis, a simplified approach has been used to obtain the elastic-plastic mechanical properties from loading-unloading curves, using a similar optimisation procedure. It is assumed that the loading-unloading portions of the curves are empirically related to some of the material properties, which avoids the need for time consuming FE analysis in evaluating the load-deformation relationship in the optimisation process. This approach shows that issues of uniqueness may arise when using a single indenter and more accurate estimation of material properties with dual indenters can be obtained by reducing the bounds of the mechanical parameters. This thesis highlights the effects of using various indenter geometries with different face angles and tilted angles, which have not been covered previously. The elastic-plastic material parameters are estimated, for the first time, in a non-linear optimisation approach, fully integrated with FE analysis, using results from a single indentation curve. Furthermore, a linear and a power-law fitting scheme to obtain elastic-plastic material properties from loading-unloading indentation curves have been introduced based on dimensional analysis, since there are no mathematical formulas or functions that fit the unloading curve well. The optimisation techniques have been extended to cover time-dependent material properties based on a two-layer viscoplasticity model, has not been investigated before.
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Li, Wanlu. "EXPERIMENTAL STUDIES ON THE DETERMINATION OF ACOUSTIC BULK MATERIAL PROPERTIES AND TRANSFER IMPEDANCE." UKnowledge, 2014. http://uknowledge.uky.edu/me_etds/48.

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Soft trim absorbing parts (i.e., headliners, backwalls, side panels, etc.) are normally comprised of different layers including films, adhesives, foams and fibers. Several approaches to determine the complex wavenumber and characteristic impedance for porous sound absorbing materials are surveyed and the advantages and disadvantages of each approach are discussed. It is concluded that the recently documented three-point method produces the smoothest results. It is also shown that measurement of the flow resistance and the use of empirical equations is sufficient for many common materials. Following this, the transfer impedance of covers, adhesives, and densified layers are measured using an impedance difference approach. The transfer matrix method was then used to predict the sound absorption of a multi-layered materal which included a perforated cover, fiber layers, and an adhesive. The predicted results agree well with measurement.
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7

Vara, Amit Rashiklal. "Determination of material properties of mild steel at different temperatures and strain rates." Master's thesis, University of Cape Town, 2007. http://hdl.handle.net/11427/5458.

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Includes abstract.
Includes bibliographical references.
Quantification of material properties through physical experiments is of significant importance. Test data from such experiments aid in the understanding of the material behaviour when exposed to a variety of loading conditions. Such data also help in the formulation of empirical and constitutive relations that can be applied in numerical simulations. This project dealt with the determination of the variation of the yield stress of mild steel with temperature and strain rate. This was achieved by carrying out high temperature tensile tests at different strain rates on mild steel specimens. These experiments also helped set a methodology for carrying out high temperature tensile tests using a servohydraulic universal tester. Results from the tests indicated that increases in temperature tended to decrease the yield stress, whereas increases in strain rate had the opposite effect. This was found to be consistent with data found in literature. It was also noted that the temperature effect was more dominant than the strain rate effect over quasi-static strain rates.
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8

Frazzoli, Alessandra. "Determination of hydration properties of insoluble plant material with different methods under physiological conditions /." Zürich : ETH, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17305.

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Sartkulvanich, Partchapol. "Determination of material properties for use in FEM simulations of machining and roller burnishing." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1167412216.

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Al, Hamrani Emad, and Nemir Gibrael. "Fast determination of fuel/feedstock material properties and composition : By Near infrared (NIR) spectroscopy." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-33522.

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Книги з теми "Material Properties Determination"

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Finckenor, J. L. Determination of significant composite processing factors by designed experiment: (MSFC Center Director's Discretionary Fund final report, project no. 95-23). MSFC, Ala: National Aeronautics and Space Administration, Marshall Space Flight Center, 2003.

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George C. Marshall Space Flight Center., ed. Determination of significant composite processing factors by designed experiment: (MSFC Center Director's Discretionary Fund final report, project no. 95-23). MSFC, Ala: National Aeronautics and Space Administration, Marshall Space Flight Center, 2003.

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3

American Concrete Institute. Committee 446. Fracture mechanics of concrete: Concepts, models and determination of material properties : report. Detroit, Mich: American Concrete Institute, 1992.

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4

Gundtoft, Hans Erik. Examination of Fibre Composites by Ultrasound for Defect Inspection and Determination of Material Properties. Roskilde, Denmark: Riso National Laboratory, 1988.

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5

IUTAM Symposium on Field Analyses for Determination of Material Parameters-- Experimental and Numerical Aspects (2000 Kiruna, Sweden). IUTAM Symposium on Field Analyses for Determination of Material Parameters-- Experimental and Numerical Aspects. Boston: Kluwer Academic Publishers, 2003.

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P, Stähle, and Sundin K. G, eds. IUTAM Symposium on Field Analyses for Determination of Material Parameters-- Experimental and Numerical Aspects: Proceedings of the IUTAM Symposium held in Abisko National Park, Kiruna, Sweden, July 31-August 4, 2000. Dordrecht: Kluwer Academic Publishers, 2003.

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7

BV, Hoogovens Groep. Mathematical model for the determination of thermal spalling in refractory material on basis of the practical relationship of the appearance of rupture, physical properties and physical conditions. Luxembourg: Commission of the European Communities, 1985.

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8

1931-, Rossiter Bryant W., and Baetzold Roger C, eds. Determination of elastic and mechanical properties. New York: Wiley, 1991.

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9

Read, B. E. The determination of dynamic properties of polymers and composites. Michigan: UMI Books on Demand, 1999.

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10

Center, Langley Research, ed. Determination of stress coefficient terms in cracked solids for monoclinic materials with plane symmetry at x₃=0. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1998.

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Частини книг з теми "Material Properties Determination"

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Schmerr, Lester W. "Material Properties and System Function Determination." In Fundamentals of Ultrasonic Nondestructive Evaluation, 385–418. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30463-2_9.

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Wenk, Jonathan F., Choon-Sik Jhun, Kay Sun, Nielen Stander, and Julius M. Guccione. "Determination of Myocardial Material Properties by Optimization." In Computational Cardiovascular Mechanics, 55–72. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0730-1_4.

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Emri, Igor, Joamin Gonzalez-Gutierrez, Marina Gergesova, Barbara V. Zupančič, and Ivan Saprunov. "Experimental Determination of Material Time-Dependent Properties." In Encyclopedia of Thermal Stresses, 1494–510. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_907.

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Krautkrämer, Josef, and Herbert Krautkrämer. "Ultrasonic Testing by Determination of Material Properties." In Ultrasonic Testing of Materials, 528–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-662-10680-8_34.

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Chew, P. H., S. L. Zeger, and F. C. P. Yin. "Determination of Material Properties of Biological Tissues: Pericardium." In Frontiers in Biomechanics, 86–97. New York, NY: Springer New York, 1986. http://dx.doi.org/10.1007/978-1-4612-4866-8_7.

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Sakurai, Shunsuke. "Cylindrical specimen for the determination of material properties." In Back Analysis in Rock Engineering, 147–51. Leiden,The Netherlands : CRC Press/Balkema, [2017] | Series:: CRC Press, 2017. http://dx.doi.org/10.1201/9781315375168-15.

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Belsky, V. M., and M. V. Zhernokletov. "Determination of Detonation Parameters and Efficiency of Solid HE Explosion Products." In Material Properties under Intensive Dynamic Loading, 329–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/978-3-540-36845-8_8.

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Hartung, Daniel, and Martin Wiedemann. "Experimental Determination of Interlaminar Material Properties of Carbon Fiber Composites." In Adaptive, tolerant and efficient composite structures, 167–77. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-29190-6_12.

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Fang, Xiangfan. "Oscillation-Free Determination of Material Properties at High Strain Rate." In Forming the Future, 53–66. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75381-8_5.

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Reimer, Thomas, Christian Zuber, Jakob Rieser, and Thomas Rothermel. "Determination of the Mechanical Properties of the Lightweight Ablative Material Zuram." In Ceramic Transactions Series, 311–26. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119423829.ch28.

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Тези доповідей конференцій з теми "Material Properties Determination"

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Karachevtseva, Lyudmila A., Vadim D. Sobolev, and Irina K. Demina. "Impurity profile determination by the optimal parameter choice method." In Material Science and Material Properties for Infrared Optoelectronics, edited by Fiodor F. Sizov. SPIE, 1999. http://dx.doi.org/10.1117/12.368368.

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2

Mannsberger, M. "Determination of bundle diameters in SWCNT material." In ELECTRONIC PROPERTIES OF MOLECULAR NANOSTRUCTURES: XV International Winterschool/Euroconference. AIP, 2001. http://dx.doi.org/10.1063/1.1426881.

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3

Kogut, L., and K. Komvopoulos. "Determination of Real Material Properties From Nanoindentation Experiments." In STLE/ASME 2003 International Joint Tribology Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/2003-trib-0272.

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Анотація:
In recent years, due to extensive development of depth-sensing indentation techniques, nanoindentation has been used to evaluate the mechanical properties of surface layers and thin films of different materials. However, current nanoindentation procedures are based on simplified assumptions about the material behavior during unloading and empirical relations of the contact area (e.g., Oliver and Pharr, 1992) with little input from analytical and numerical solutions. Therefore, it is unclear what properties can be measured using instrumented nanoindentation techniques and what is the validity of the present procedures for measuring reduced elastic modulus and material hardness. Thus, the main objective of the present study was to analyze the validity of the current approaches for determining material properties and to propose an alternative approach for measuring the reduced elastic modulus, yield strength, and material hardness.
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4

Muller, W. H., H. Worrack, J. Sterthaus, J. Wilden, and J. Villain. "Determination of Mechanical Material Properties of Joining Materials, in particular Microelectronic Solders." In 2008 10th Electronics Packaging Technology Conference (EPTC). IEEE, 2008. http://dx.doi.org/10.1109/eptc.2008.4763495.

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5

Bogoboyashchiy, V. V. "New approach to the problem of determination of optical band gap of crystals with exponential absorption edge." In Material Science and Material Properties for Infrared Optoelectronics, edited by Fiodor F. Sizov. SPIE, 1999. http://dx.doi.org/10.1117/12.368361.

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6

Franc, Jan, Eduard Belas, Roman Grill, A. L. Toth, Helmut Sitter, Pavel Moravec, and Pavel Hoeschl. "Determination of diffusion lengths of minority carriers in Hg1-xCdxTe (x~0.2 to 0.3) by EBIC method." In Material Science and Material Properties for Infrared Optoelectronics, edited by Fiodor F. Sizov and Vladimir V. Tetyorkin. SPIE, 1997. http://dx.doi.org/10.1117/12.280429.

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7

Petrasova, Tatana. "DETERMINATION OF DUMP MATERIAL PROPERTIES FROM COAL MINE BILINA." In 15th International Multidisciplinary Scientific GeoConference SGEM2015. Stef92 Technology, 2011. http://dx.doi.org/10.5593/sgem2015/b12/s2.032.

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8

Hutchings, Allison, Robert Braun, Kento Masuyama, and Joseph Welch. "Experimental Determination of Material Properties for Inflatable Aeroshell Structures." In 20th AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2009. http://dx.doi.org/10.2514/6.2009-2949.

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9

Berkovic-Subic, M., I. Boras, J. Franceski, J. Kodvanj, A. Rodic, M. Surjak, S. Svaic, and Z. Tonkovic. "Application of IR Thermography for Determination the Material Properties." In Quantitative InfraRed Thermography Asia 2015. QIRT Council, 2015. http://dx.doi.org/10.21611/qirt.2015.0115.

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10

Koller, Stefan, V. Ziebart, Oliver Paul, Oliver Brand, Henry Baltes, Pasqualina M. Sarro, and Michael J. Vellekoop. "Determination of mechanical material properties of piezoelectric ZnO films." In 5th Annual International Symposium on Smart Structures and Materials, edited by Vijay K. Varadan, Paul J. McWhorter, Richard A. Singer, and Michael J. Vellekoop. SPIE, 1998. http://dx.doi.org/10.1117/12.320160.

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Звіти організацій з теми "Material Properties Determination"

1

Jarzynski, Jacek. In-Situ Determination of Coating Material Acoustic Properties. Fort Belvoir, VA: Defense Technical Information Center, October 1996. http://dx.doi.org/10.21236/ada316228.

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2

Friedman, Shmuel, Jon Wraith, and Dani Or. Geometrical Considerations and Interfacial Processes Affecting Electromagnetic Measurement of Soil Water Content by TDR and Remote Sensing Methods. United States Department of Agriculture, 2002. http://dx.doi.org/10.32747/2002.7580679.bard.

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Анотація:
Time Domain Reflectometry (TDR) and other in-situ and remote sensing dielectric methods for determining the soil water content had become standard in both research and practice in the last two decades. Limitations of existing dielectric methods in some soils, and introduction of new agricultural measurement devices or approaches based on soil dielectric properties mandate improved understanding of the relationship between the measured effective permittivity (dielectric constant) and the soil water content. Mounting evidence indicates that consideration must be given not only to the volume fractions of soil constituents, as most mixing models assume, but also to soil attributes and ambient temperature in order to reduce errors in interpreting measured effective permittivities. The major objective of the present research project was to investigate the effects of the soil geometrical attributes and interfacial processes (bound water) on the effective permittivity of the soil, and to develop a theoretical frame for improved, soil-specific effective permittivity- water content calibration curves, which are based on easily attainable soil properties. After initializing the experimental investigation of the effective permittivity - water content relationship, we realized that the first step for water content determination by the Time Domain Reflectometry (TDR) method, namely, the TDR measurement of the soil effective permittivity still requires standardization and improvement, and we also made more efforts than originally planned towards this objective. The findings of the BARD project, related to these two consequential steps involved in TDR measurement of the soil water content, are expected to improve the accuracy of soil water content determination by existing in-situ and remote sensing dielectric methods and to help evaluate new water content sensors based on soil electrical properties. A more precise water content determination is expected to result in reduced irrigation levels, a matter which is beneficial first to American and Israeli farmers, and also to hydrologists and environmentalists dealing with production and assessment of contamination hazards of this progressively more precious natural resource. The improved understanding of the way the soil geometrical attributes affect its effective permittivity is expected to contribute to our understanding and predicting capability of other, related soil transport properties such as electrical and thermal conductivity, and diffusion coefficients of solutes and gas molecules. In addition, to the originally planned research activities we also investigated other related problems and made many contributions of short and longer terms benefits. These efforts include: Developing a method and a special TDR probe for using TDR systems to determine also the soil's matric potential; Developing a methodology for utilizing the thermodielectric effect, namely, the variation of the soil's effective permittivity with temperature, to evaluate its specific surface area; Developing a simple method for characterizing particle shape by measuring the repose angle of a granular material avalanching in water; Measurements and characterization of the pore scale, saturation degree - dependent anisotropy factor for electrical and hydraulic conductivities; Studying the dielectric properties of cereal grains towards improved determination of their water content. A reliable evaluation of the soil textural attributes (e.g. the specific surface area mentioned above) and its water content is essential for intensive irrigation and fertilization processes and within extensive precision agriculture management. The findings of the present research project are expected to improve the determination of cereal grain water content by on-line dielectric methods. A precise evaluation of grain water content is essential for pricing and evaluation of drying-before-storage requirements, issues involving energy savings and commercial aspects of major economic importance to the American agriculture. The results and methodologies developed within the above mentioned side studies are expected to be beneficial to also other industrial and environmental practices requiring the water content determination and characterization of granular materials.
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Wu, Qihua, Kathryn Kremer, Stephen Gibbons, and Alan Kennedy. Determination of nanomaterial viscosity and rheology properties using a rotational rheometer. Engineer Research and Development Center (U.S.), April 2022. http://dx.doi.org/10.21079/11681/43964.

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Анотація:
Rheology studies the flow of matter and is one of the most important methods for materials characterization because flow behavior is responsive to properties such as molecular weight and molecular weight distribution. Rheological properties help practitioners understand fluid flow and how to improve manufacturing processes. Rheometers have been extensively used to determine the viscosity and rheological properties of different materials because the measurements are quick, accurate, and reliable. In this standard operating procedure, a general protocol using a rotational rheometer is developed for characterizing rheological properties of nanomaterials. Procedures and recommendations for sample preparation, instrument preparation, sample measurements, and results analysis are included. The procedure was tested on a variety of carbon-based nanomaterials.
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Wilson, M. J., and J. W. Crutcher. Determination of the probability for radioactive materials on properties in Monticello, Utah. Office of Scientific and Technical Information (OSTI), February 1991. http://dx.doi.org/10.2172/6123235.

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5

Huang, Haohang, Erol Tutumluer, Jiayi Luo, Kelin Ding, Issam Qamhia, and John Hart. 3D Image Analysis Using Deep Learning for Size and Shape Characterization of Stockpile Riprap Aggregates—Phase 2. Illinois Center for Transportation, September 2022. http://dx.doi.org/10.36501/0197-9191/22-017.

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Riprap rock and aggregates are extensively used in structural, transportation, geotechnical, and hydraulic engineering applications. Field determination of morphological properties of aggregates such as size and shape can greatly facilitate the quality assurance/quality control (QA/QC) process for proper aggregate material selection and engineering use. Many aggregate imaging approaches have been developed to characterize the size and morphology of individual aggregates by computer vision. However, 3D field characterization of aggregate particle morphology is challenging both during the quarry production process and at construction sites, particularly for aggregates in stockpile form. This research study presents a 3D reconstruction-segmentation-completion approach based on deep learning techniques by combining three developed research components: field 3D reconstruction procedures, 3D stockpile instance segmentation, and 3D shape completion. The approach was designed to reconstruct aggregate stockpiles from multi-view images, segment the stockpile into individual instances, and predict the unseen side of each instance (particle) based on the partial visible shapes. Based on the dataset constructed from individual aggregate models, a state-of-the-art 3D instance segmentation network and a 3D shape completion network were implemented and trained, respectively. The application of the integrated approach was demonstrated on re-engineered stockpiles and field stockpiles. The validation of results using ground-truth measurements showed satisfactory algorithm performance in capturing and predicting the unseen sides of aggregates. The algorithms are integrated into a software application with a user-friendly graphical user interface. Based on the findings of this study, this stockpile aggregate analysis approach is envisioned to provide efficient field evaluation of aggregate stockpiles by offering convenient and reliable solutions for on-site QA/QC tasks of riprap rock and aggregate stockpiles.
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Shmulevich, Itzhak, Shrini Upadhyaya, Dror Rubinstein, Zvika Asaf, and Jeffrey P. Mitchell. Developing Simulation Tool for the Prediction of Cohesive Behavior Agricultural Materials Using Discrete Element Modeling. United States Department of Agriculture, October 2011. http://dx.doi.org/10.32747/2011.7697108.bard.

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Анотація:
The underlying similarity between soils, grains, fertilizers, concentrated animal feed, pellets, and mixtures is that they are all granular materials used in agriculture. Modeling such materials is a complex process due to the spatial variability of such media, the origin of the material (natural or biological), the nonlinearity of these materials, the contact phenomenon and flow that occur at the interface zone and between these granular materials, as well as the dynamic effect of the interaction process. The lack of a tool for studying such materials has limited the understanding of the phenomena relevant to them, which in turn has led to energy loss and poor quality products. The objective of this study was to develop a reliable prediction simulation tool for cohesive agricultural particle materials using Discrete Element Modeling (DEM). The specific objectives of this study were (1) to develop and verify a 3D cohesionless agricultural soil-tillage tool interaction model that enables the prediction of displacement and flow in the soil media, as well as forces acting on various tillage tools, using the discrete element method; (2) to develop a micro model for the DEM formulation by creating a cohesive contact model based on liquid bridge forces for various agriculture materials; (3) to extend the model to include both plastic and cohesive behavior of various materials, such as grain and soil structures (e.g., compaction level), textures (e.g., clay, loam, several grains), and moisture contents; (4) to develop a method to obtain the parameters for the cohesion contact model to represent specific materials. A DEM model was developed that can represent both plastic and cohesive behavior of soil. Soil cohesive behavior was achieved by considering tensile force between elements. The developed DEM model well represented the effect of wedge shape on soil behavior and reaction force. Laboratory test results showed that wedge penetration resistance in highly compacted soil was two times greater than that in low compacted soil, whereas DEM simulation with parameters obtained from the test of low compacted soil could not simply be extended to that of high compacted soil. The modified model took into account soil failure strength that could be changed with soil compaction. A three dimensional representation composed of normal displacement, shear failure strength and tensile failure strength was proposed to design mechanical properties between elements. The model based on the liquid bridge theory. An inter particle tension force measurement tool was developed and calibrated A comprehensive study of the parameters of the contact model for the DEM taking into account the cohesive/water-bridge was performed on various agricultural grains using this measurement tool. The modified DEM model was compared and validated against the test results. With the newly developed model and procedure for determination of DEM parameters, we could reproduce the high compacted soil behavior and reaction forces both qualitatively and quantitatively for the soil conditions and wedge shapes used in this study. Moreover, the effect of wedge shape on soil behavior and reaction force was well represented with the same parameters. During the research we made use of the commercial PFC3D to analyze soil tillage implements. An investigation was made of three different head drillers. A comparison of three commonly used soil tillage systems was completed, such as moldboard plow, disc plow and chisel plow. It can be concluded that the soil condition after plowing by the specific implement can be predicted by the DEM model. The chisel plow is the most economic tool for increasing soil porosity. The moldboard is the best tool for soil manipulation. It can be concluded that the discrete element simulation can be used as a reliable engineering tool for soil-implement interaction quantitatively and qualitatively.
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Wright, Maurice A. A Proposal for Funding to Purchase a High-Temperature Furnace to Enable Determination of the High Temperature Mechanical Properties of Structural Carbon Materials. Fort Belvoir, VA: Defense Technical Information Center, October 1988. http://dx.doi.org/10.21236/ada204103.

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