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Artykuły w czasopismach na temat „Compression and Indentation testing”

Autor: Grafiati

Data publikacji: 6 września 2023

Data aktualizacji: 31 lipca 2025

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1

Nakao, Yuki, Hiroyuki Yamada, and 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

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Grujicic, M., JS Snipes, and 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, no. 6 (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

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Idris, Maizlinda I., Tania Vodenitcharova, and Mark Hoffman. "Resistance of Thin Al Foam Panels to Deep Indentation." Materials Science Forum 561-565 (October 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-sec

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Dias, A. M. S., and G. C. D. Godoy. "Determination of Stress-Strain Curve through Berkovich Indentation Testing." Materials Science Forum 636-637 (January 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 th

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Affolter, Christian, Götz Thorwarth, Ariyan Arabi-Hashemi, Ulrich Müller, and Bernhard Weisse. "Ductile Compressive Behavior of Biomedical Alloys." Metals 10, no. 1 (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 c

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6

Cao, Li, Inchan Youn, Farshid Guilak, and 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, no. 5 (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 stud

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7

SHIMIZU, Yuta, and 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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Lin, David C., Emilios K. Dimitriadis, and Ferenc Horkay. "Robust Strategies for Automated AFM Force Curve Analysis—I. Non-adhesive Indentation of Soft, Inhomogeneous Materials." Journal of Biomechanical Engineering 129, no. 3 (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

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9

Lee, Moon Kyu, Kui Won Choi, Tae Soo Lee, and H. N. Lim. "Evaluation of Indentation Test for Measuring Young’s Modulus of Cancellous Bone." Materials Science Forum 544-545 (May 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

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10

Xu, B. X., and Z. F. Yue. "Study of the ratcheting by the indentation fatigue method with a flat cylindrical indenter: Part I. Experimental study." Journal of Materials Research 21, no. 7 (2006): 1793–97. http://dx.doi.org/10.1557/jmr.2006.0222.

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Generally, ratcheting is studied on round specimens under tension–compression tests with a nonzero mean load. This work explored the possibility of studying ratcheting by indentation fatigue with a flat cylindrical indenter. In the experiment, emphasis was concentrated on the influence of maximum indentation load (Pmax.), indentation load variance (ΔP = Pmax − Pmin) and frequency of cycling (f) on the indentation depth–cycle curves. The experimental results showed that the indentation depth–cycle curves are analogous to the conventional strain–cycle curve of uniaxial fatigue testing, which has

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11

Zobitz, Mark E., Zong-Ping Luo, and Kai-Nan An. "Determination of the Compressive Material Properties of the Supraspinatus Tendon." Journal of Biomechanical Engineering 123, no. 1 (2000): 47–51. http://dx.doi.org/10.1115/1.1339816.

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A methodology was developed for determining the compressive properties of the supraspinatus tendon, based on finite element principles. Simplified three-dimensional models were created based on anatomical thickness measurements of unloaded supraspinatus tendons over 15 points. The tendon material was characterized as a composite structure of longitudinally arranged collagen fibers within an extrafibrillar matrix. The matrix was formulated as a hyperelastic material described by the Ogden form of the strain energy potential. The hyperelastic material parameters were parametrically manipulated u

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12

Chen, Xingyu, Yilu Zhou, Liyun Wang, Michael H. Santare, Leo Q. Wan, and X. Lucas Lu. "Determining Tension–Compression Nonlinear Mechanical Properties of Articular Cartilage from Indentation Testing." Annals of Biomedical Engineering 44, no. 4 (2015): 1148–58. http://dx.doi.org/10.1007/s10439-015-1402-8.

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Jin, Hui, and Jack L. Lewis. "Determination of Poisson’s Ratio of Articular Cartilage by Indentation Using Different-Sized Indenters." Journal of Biomechanical Engineering 126, no. 2 (2004): 138–45. http://dx.doi.org/10.1115/1.1688772.

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Articular cartilage is often characterized as an isotropic elastic material with no interstitial fluid flow during instantaneous and equilibrium conditions, and indentation testing commonly used to deduce material properties of Young’s modulus and Poisson’s ratio. Since only one elastic parameter can be deduced from a single indentation test, some other test method is often used to allow separate measurement of both parameters. In this study, a new method is introduced by which the two material parameters can be obtained using indentation tests alone, without requiring a secondary different ty

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14

Antipova, Christina G., Arthur E. Krupnin, Arthur R. Zakirov, et al. "A Comprehensive Mechanical Testing of Polyacrylamide Hydrogels: The Impact of Crosslink Density." Polymers 17, no. 6 (2025): 737. https://doi.org/10.3390/polym17060737.

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Mechanical properties are one of the most important characteristics of biomaterials for many different applications, including biomedicine. Soft biomaterials, such as hydrogels, are difficult to characterize by conventional mechanical testing, because their mechanical properties are much lower than required by conventional testing machines. In this work, we aimed to systematically study the mechanical behavior of a model soft material, polyacrylamide hydrogels, under different loading modes: tension, torsion, compression, and indentation. This allowed us to develop a comprehensive approach to

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15

Murthy, Tejas G., Christopher Saldana, Matthew Hudspeth, and Rachid M'Saoubi. "Deformation field heterogeneity in punch indentation." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 470, no. 2166 (2014): 20130807. http://dx.doi.org/10.1098/rspa.2013.0807.

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Plastic heterogeneity in indentation is fundamental for understanding mechanics of hardness testing and impression-based deformation processing methods. The heterogeneous deformation underlying plane-strain indentation was investigated in plastic loading of copper by a flat punch. Deformation parameters were measured, in situ , by tracking the motion of asperities in high-speed optical imaging. These measurements were coupled with multi-scale analyses of strength, microstructure and crystallographic texture in the vicinity of the indentation. Self-consistency is demonstrated in description of

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16

Prakash, Raghu V. "Understanding Fatigue Damage Progression in Stainless Steel 304L through Static and Cyclic Indentation Studies." Materials Performance and Characterization 13, no. 2 (2024): 144–64. https://doi.org/10.1520/mpc20230133.

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ABSTRACT Understanding fatigue damage progression and estimating remaining life is a major challenge in the asset management of safety critical components. A small scoop of material is extracted from the critical locations of a component, and the fatigue property is estimated from the small volume of material. Cyclic automated ball indentation (ABI), cyclic small punch test and cyclic bulge test are the three known small volume fatigue test methods; among them, cyclic ABI has the potential to be used in situ apart from laboratory testing. During cyclic ABI testing, compression-compression fati

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17

Cui, Shenglin, Atsushi Sakuma, Tsuyoshi Morita, and Hideo Matsui. "Effect Evaluation of Repeated Compression for Tactile Hardening of Cotton Pile Towel by Indentation Test." Key Engineering Materials 978 (March 27, 2024): 137–42. http://dx.doi.org/10.4028/p-qxq4ws.

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Pile has a textured structure that contains voids and cavities, and the texture hardens with repeated use. It is advantageous to numerically evaluate the hardening characteristics of the pile texture for the development of the products such as towels. Then, the objective of this study is to establish an objective method for evaluating the hardening of the pile due to repeated use. In particular, to determine product specifications, it is necessary to define the conditions under which measurement results are stable. Therefore, for proper design of pile products, objective test methods for repea

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18

Shojaei, Pouya, Riccardo Scazzosi, Mohamed Trabia, et al. "An Approach for Material Model Identification of a Composite Coating Using Micro-Indentation and Multi-Scale Simulations." Coatings 12, no. 1 (2022): 92. http://dx.doi.org/10.3390/coatings12010092.

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While deposited thin film coatings can help enhance surface characteristics such as hardness and friction, their effective incorporation in product design is restricted by the limited understanding of their mechanical behavior. To address this, an approach combining micro-indentation and meso/micro-scale simulations was proposed. In this approach, micro-indentation testing was conducted on both the coating and the substrate. A meso-scale uniaxial compression finite element model was developed to obtain a material model of the coating. This material model was incorporated within an axisymmetric

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19

Minnert, Christian, Hamad ur Rehman, and Karsten Durst. "Thermally activated dislocation mechanism in Mo studied by indentation, compression and impact testing." Journal of Materials Research 36, no. 12 (2021): 2397–407. http://dx.doi.org/10.1557/s43578-021-00126-4.

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Abstract Body-centered cubic metals like molybdenum and tungsten are interesting structural materials for high-temperature applications. These metals, are however, brittle at low homologous temperature, caused by the limited mobility of screw dislocations. In this study, the thermally activated deformation mechanisms in bcc Mo have been investigated using strain rate jump nanoindentation and compression tests as well as Charpy V-notch impact testing. The material shows a significant softening with increasing temperature and a maximum in strain rate sensitivity is found at the critical temperat

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20

Desai, C. C., and M. S. V. Ramana. "Vickers micromechanical indentation and compression testing of ferroelectric lead hydrogen phosphate single crystals." Journal of Materials Science 23, no. 2 (1988): 617–20. http://dx.doi.org/10.1007/bf01174695.

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Field, J. S., and M. V. Swain. "Determining the mechanical properties of small volumes of material from submicrometer spherical indentations." Journal of Materials Research 10, no. 1 (1995): 101–12. http://dx.doi.org/10.1557/jmr.1995.0101.

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The stress/strain behavior of bulk material is usually investigated in uniaxial tension or compression; however, these methods are not generally available for very small volumes of material. Submicrometer indentation using a spherical indenter has the potential for filling this gap with, possibly, access to hardness and elastic modulus profiles, representative stress/strain curves, and the strain hardening index. The proposed techniques are based on principles well established in hardness testing using spherical indenters, but not previously applied to depth-sensing instruments capable of meas

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PASKA, ZBYNEK, JAROSLAV ROJICEK, MARTIN FUSEK, FRANTISEK FOJTIK, DAGMAR LICKOVA, and JAKUB CIENCIALA. "MOUNTING FOAMS: MAKING OF SPECIMENS AND MECHANICAL TESTING." MM Science Journal 2022, no. 3 (2022): 5893–900. http://dx.doi.org/10.17973/mmsj.2022_10_2022118.

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The article deals with the design of the technology of production of polyurethane foam (PU) specimens and with their mechanical testing. A simple procedure is proposed to produce specimens with complex shapes. The procedure is tested on two different mounting foams. These specimens were subjected to several experiments. The article presents experimental results for only one mounting foam. The tests were performed on a Testometric M500-50CT testing machine. Specifically, these are a tensile/compression test, a 3-point bending test, a shear test, and a modified indentation test. For each specime

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Juliano, Thomas F., Aaron M. Forster, Peter L. Drzal, Tusit Weerasooriya, Paul Moy, and Mark R. VanLandingham. "Multiscale mechanical characterization of biomimetic physically associating gels." Journal of Materials Research 21, no. 8 (2006): 2084–92. http://dx.doi.org/10.1557/jmr.2006.0254.

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The mechanical response of living tissue is important to understanding the injury-risk associated with impact events. Often, ballistic gelatin or synthetic materials are developed to serve as tissue surrogates in mechanical testing. Unfortunately, current materials are not optimal and present several experimental challenges. Bulk measurement techniques, such as compression and shear testing geometries, do not fully represent the stress states and rate of loading experienced in an actual impact event. Indentation testing induces deviatoric stress states as well as strain rates not typically ava

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Feng, Shangxin, Yuxing Zhang, Yufei Zhao, and Mengchen Yun. "Rock Indentation Behavior: Effects of Penetration Rates and Indenter Types." Applied Sciences 15, no. 4 (2025): 1785. https://doi.org/10.3390/app15041785.

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This paper is an attempt to investigate the rock indentation behaviors of a conical pick under different loading rates (1, 2, 3, and 4 mm/min), indenter types (sharp and blunt indenters), and types of rock (concrete, limestone, granite). Serial indentation tests by indenters were first performed by an automatic universal testing machine and monitored by an i-SPEED high-speed camera to record the peak pick force, indentation depth, rock fracture area, and rock failure process. Accordingly, the effect of loading rates, rock brittleness, and pick type on rock indentation behaviors was subsequentl

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Zhao, Jiyun, Chao Cao, Guilin Li, et al. "Study on the Similarity of Biomechanical Behavior between Gelatin and Porcine Liver." BioMed Research International 2020 (August 24, 2020): 1–10. http://dx.doi.org/10.1155/2020/7021636.

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As a natural polymer, gelatin is increasingly being used as a substitute for animals or humans for the simulation and testing of surgical procedures. In the current study, the similarity verification was neglected and a 10 wt.% or 20 wt.% gelatin sample was used directly. To compare the mechanical similarities between gelatin and biological tissues, different concentrations of gelatin samples were subjected to tensile, compression, and indentation tests and compared with porcine liver tissue. The loading rate in the three tests fully considered the surgical application conditions; notably, a l

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Kang, Xueqin, Chi Yao, Lei Qiao, Gaofeng Ge, and Peizhong Feng. "Processing and Mechanical Properties of Ultra-high Molecular Weight Polyethylene Reinforced by Silver Nanoparticles." Polymers and Polymer Composites 25, no. 9 (2017): 683–88. http://dx.doi.org/10.1177/096739111702500906.

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The present study was designed to investigate the mechanical performance of ultra high molecular weight polyethylene (UHMWPE) reinforced by silver nanoparticles. The Ag/UHMWPE nanocomposites were prepared by a plate vulcanizing machine and tested with a contact angle micrometer, UMT friction tester, electronic universal testing machine and MicroXAM three-dimensional profilometer to characterise the wettability, ball indentation hardness, creep resistance, compression properties, and friction and wear performance. A scanning electron microscope (SEM) was employed to describe the morphology of t

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Li, Zong-Ming. "GENDER DIFFERENCE IN CARPAL TUNNEL COMPLIANCE." Journal of Musculoskeletal Research 09, no. 03 (2005): 153–59. http://dx.doi.org/10.1142/s0218957705001527.

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The purposes of this study were to investigate the mechanical properties of the carpal tunnel and to examine carpal tunnel compliance as it related to gender difference. Twelve male and twelve female subjects without any neuromusculoskeletal disorders in the upper extremities participated in the study. Indentation testing was manually performed on the wrist volar to the transverse carpal ligament. Effective compliance was defined as the slope of the regression analyses of indentation force and displacement data. In the tested indentation force range (2.45–19.60 N), the displacement of females

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Dennis, Cole J., and Cheryl E. Quenneville. "Comprehensive Characterization of Soft Tissue and Surrogate Materials across Varied Loading Methods." SAE International Journal of Transportation Safety 12, no. 2 (2024): 121–30. http://dx.doi.org/10.4271/09-12-02-0012.

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<div>Exploring the mechanical properties of soft tissues under compressive loading is crucial for understanding their role in automobile incidents. Soft tissues, which serve as cushions or padding between bone and vehicle interiors, significantly influence contact duration and forces, thereby altering incident kinematics and injury. In this investigation, muscle and soft connective tissues from post-mortem human subjects (PMHS) forearms were excised and subjected to compression and indentation testing methods at various rates and strains. Specific samples with higher proportions of muscl

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Potrzeszcz-Sut, Beata, and Agnieszka Dudzik. "The Application of a Hybrid Method for the Identification of Elastic–Plastic Material Parameters." Materials 15, no. 12 (2022): 4139. http://dx.doi.org/10.3390/ma15124139.

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The indentation test is a popular method for the investigation of the mechanical properties of materials. The technique, which combines traditional indentation tests with mapping the shape of the imprint, provides more data describing the material parameters. In this paper, such methodology is employed for estimating the selected material parameters described by Ramberg–Osgood’s law, i.e., Young’s modulus, the yield point, and the material hardening exponent. Two combined identification methods were used: the P-A procedure, in which the material parameters are identified on the basis of the co

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Gyurkó, Zoltán, and Rita Nemes. "Static Hardness Testing of Cement Mortars Containing Different Types of Recycled Construction Waste Powders." Solids 2, no. 4 (2021): 331–40. http://dx.doi.org/10.3390/solids2040021.

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The present paper deals with the hardness of cement mortars prepared with recycled materials that are potential supplementary cementitious materials (SCM). Two potential SCMs (aerated concrete powder (ACP) and concrete powder) were investigated and compared with a reference (neat cement) sample and a sample containing metakaolin (MK). The long-term performance of the mortars was studied up to the age of one year. Based on the compressive strength tests at different ages, neither concrete powder nor ACP significantly decreases the compressive strength at a 10% substitution ratio. The samples we

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Naughton-Duszová, Csanádi, Sedlák, Hvizdoš, and Dusza. "Small-Scale Mechanical Testing of Cemented Carbides from the Micro- to the Nano-Level: A Review." Metals 9, no. 5 (2019): 502. http://dx.doi.org/10.3390/met9050502.

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In this overview, we summarize the results published to date concerning the small-scale mechanical testing of WC–Co cemented carbides and similar hardmetals, describing the clear trend in the research towards ever-smaller scales (currently at the nano-level). The load-size effect during micro/nanohardness testing of hardmetals and their constituents and the influence of the WC grain orientation on their deformation, hardness, indentation modulus, fracture toughness, and fatigue characteristics are discussed. The effect of the WC grain size/orientation, cobalt content, and testing environment o

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Jayababu, A., V. Arumugam, B. Rajesh, and C. Suresh Kumar. "Damage Characterization in Glass/Epoxy Composite Laminates under Normal and Oblique Planes of Cyclic Indentation Loading with AE Monitoring." Materials Evaluation 79, no. 1 (2021): 61–77. http://dx.doi.org/10.32548/2021.me-04126.

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This work focuses on the experimental investigation of indentation damage resistance in different stacking sequences of glass/epoxy composite laminates under cyclic loading on normal (0°) and oblique (20°) planes. The stacking sequence, such as unidirectional [0]12, angle ply [±45]6S, and cross ply [0/90]6S, were subjected to cyclic indentation loading and monitoring by acoustic emission testing (AE). The laminates were loaded at the center using a hemispherical steel indenter with a 12.7 mm diameter. The cyclic indentation loading was performed at displacements from 0.5 to 3 mm with an increm

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Jayababu, A., V. Arumugam, B. Rajesh, and C. Suresh Kumar. "Damage Characterization in Glass/Epoxy Composite Laminates under Normal and Oblique Planes of Cyclic Indentation Loading with AE Monitoring." Materials Evaluation 79, no. 1 (2021): 61–77. http://dx.doi.org/10.32548/2020.me-04126.

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This work focuses on the experimental investigation of indentation damage resistance in different stacking sequences of glass/epoxy composite laminates under cyclic loading on normal (0°) and oblique (20°) planes. The stacking sequence, such as unidirectional [0]12, angle ply [±45]6S, and cross ply [0/90]6S, were subjected to cyclic indentation loading and monitoring by acoustic emission testing (AE). The laminates were loaded at the center using a hemispherical steel indenter with a 12.7 mm diameter. The cyclic indentation loading was performed at displacements from 0.5 to 3 mm with an increm

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Xu, B. X., and Z. F. Yue. "Study of ratcheting by the indentation fatigue method with a flat cylindrical indenter. Part II. Finite element simulation." Journal of Materials Research 22, no. 1 (2007): 186–92. http://dx.doi.org/10.1557/jmr.2007.0019.

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The finite element method (FEM) was used to study the flat cylindrical indentation fatigue behavior using a kinematic hardening model (A-F model). This study was motivated by the experimental work of the preceding paper [B.X. Xu and Z.F. Yue, J. Mater. Res.21, 1793 (2006)], in which there were obvious similarities in the behavior of conventional fatigue specimens and indentation fatigue specimens. It is proposed that the A-F model can predict the indentation fatigue behavior. Generally, the experimental behavior of the indentation fatigue testing can be explained by the FEM analysis. In additi

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Cheshomi, Akbar, Golnaz Hajipour, Jafar Hassanpour, Bahman Bagha Dashtaki, Yavar Firouzei, and Ebrahim Ahmadi Sheshde. "Estimation of uniaxial compressive strength of shale using indentation testing." Journal of Petroleum Science and Engineering 151 (March 2017): 24–30. http://dx.doi.org/10.1016/j.petrol.2017.01.030.

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Wang, Yanli, Pengfei Dong, Jingyao Ke, et al. "Experimental evaluation of self-expandable metallic tracheobronchial stents." Nanotechnology Reviews 8, no. 1 (2019): 136–42. http://dx.doi.org/10.1515/ntrev-2019-0013.

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Abstract The self-expandable metallic stents have been widely used in tracheobronchial obstruction or fistulation, including the J-shaped and Y-shaped stents, named after the shape of the branch-stem junction of the stent. However, there is scarce data on the mechanical performance of these tracheobronchial stents, which is essential for optimal stent implantation. In this work, eight self-expandable metallic tracheobronchial stents in three types (i.e., straight, J-shaped, and Y-shaped), with or without cover, were characterized. The compression resistance of the stems was investigated throug

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Jayababu, A., V. Arumugam, B. Rajesh, and C. Suresh Kumar. "Investigation of indentation damage resistance on normal and inclined plane of glass/epoxy composite laminates using acoustic emission monitoring." Journal of Composite Materials 54, no. 21 (2020): 2953–64. http://dx.doi.org/10.1177/0021998320906864.

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This work relates to the investigation of indentation induced damage resistance in glass fiber reinforced polymer composite laminates under normal and inclined planes. Uni-directional [0] and cross-ply [0/90] glass fiber reinforced polymer composite specimens were subjected to 0° and 20° indentation loading with acoustic emission monitoring. The specimens were loaded at the centre using a hemispherical steel indenter with 12.7 mm diameter. Mechanical responses such as force–displacement behavior, absorbed energy and resulting damage area were used for the quantification of the indentation dama

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Fang, Xufei, Lukas Porz, Kuan Ding, and Atsutomo Nakamura. "Bridging the Gap between Bulk Compression and Indentation Test on Room-Temperature Plasticity in Oxides: Case Study on SrTiO3." Crystals 10, no. 10 (2020): 933. http://dx.doi.org/10.3390/cryst10100933.

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Dislocation-based functionalities in inorganic ceramics and semiconductors are drawing increasing attention, contrasting the conventional belief that the majority of ceramic materials are brittle at room temperature. Understanding the dislocation behavior in ceramics and advanced semiconducting materials is therefore critical for the mechanical reliability of such materials and devices designed for harvesting the dislocation-based functionalities. Here we compare the mechanical testing between indentation at nano-/microscale and bulk uniaxial deformation at macroscale and highlight the disloca

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LaFontaine, W. R., B. Yost, and Che-Yu Li. "Effect of residual stress and adhesion on the hardness of copper films deposited on silicon." Journal of Materials Research 5, no. 4 (1990): 776–83. http://dx.doi.org/10.1557/jmr.1990.0776.

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Continuous indentation testing was used to measure the hardness as a function of indentation depth, of three micron thick copper films deposited on silicon with an intermediate layer of 20 nm thick chromium or titanium. Three different indenters, a nearly perfect Vickers, a Vickers with a 1.2 μm2 flat, and a Pyramid with a 25 μm2 flat were employed. The hardness data suggest that the titanium interlayer produced significantly greater film/substrate adhesion than the chromium interlayer. A compressive residual stress, which relaxed with time, was detected in the samples with the titanium interl

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Ding, Yao Yao, Tadafumi Adschiri, Garry A. Williams, et al. "Validation of BioDent TDI as a New Clinical Diagnostic Method." Advanced Materials Research 275 (July 2011): 151–54. http://dx.doi.org/10.4028/www.scientific.net/amr.275.151.

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Indentation is a mature technique that has been widely used in materials science to investigate the mechanical properties of metals and thin films. The indentation technique provides accurate modulus and hardness values of materials over many length scales and can target specific microstructures within heterogeneous materials. A more traditional engineering approach for mechanical properties is three point bend testing which provides an indication of the general fracture performance of the material. The breaking force and toughness results determined are based on the materials overall structur

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Larsson, Per-Lennart. "On the Behavior of Mechanical Stress Fields at Indentation of Materials with Residual Stresses." Journal of Materials Engineering and Performance 30, no. 4 (2021): 2566–73. http://dx.doi.org/10.1007/s11665-021-05596-5.

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AbstractIt is an obvious fact that residual stresses can have a detrimental effect on the mechanical integrity of structures. Measuring such stresses can often be a tedious task and for that reason sharp indentation testing has been proposed as an alternative for this purpose. Correlation between global indentation properties and residual stresses has been studied quite frequently, and a solid foundation has been laid down concerning this issue. Empirical, or semi-empirical, relations have been proposed yielding results of quite good accuracy. Further progress and mechanical understanding rega

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Nuriev, A. A., and Sh Kh Sultanov. "Using proppant indentation coefficient in design of hydraulic fracturing treatment of oil source rocks." Earth sciences and subsoil use 45, no. 3 (2022): 305–12. http://dx.doi.org/10.21285/2686-9993-2022-45-3-305-312.

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The purpose of the study is the laboratory determination of proppant indentation coefficients depending on the geological composition of the oil source rocks and their application in the design of hydraulic fracturing treatment. The laboratory researches used the core material of oil-producing deposits of the Domanic formation. The indentation of prop pant was carried out on the CTM-100 compression testing machine, in order to eliminate the measurement error, the size of the cells was additionally specified using ADF U300P microscope with the operation capacity either in reflected light or ref

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Zaharia, Sebastian Marian, Mihai Alin Pop, Lucia-Antoneta Chicos, et al. "Compression and Bending Properties of Short Carbon Fiber Reinforced Polymers Sandwich Structures Produced via Fused Filament Fabrication Process." Polymers 14, no. 14 (2022): 2923. http://dx.doi.org/10.3390/polym14142923.

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Additive manufacturing, through the process of thermoplastic extrusion of filament, allows the manufacture of complex composite sandwich structures in a short time with low costs. This paper presents the design and fabrication by Fused Filament Fabrication (FFF) of composite sandwich structures with short fibers, having three core types C, Z, and H, followed by mechanical performance testing of the structures for compression and bending in three points. Flatwise compression tests and three-point bending have clearly indicated the superior performance of H-core sandwich structures due to dense

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Șutic, Alexandra-Tamara, Romeu Chelariu, Ramona Cimpoeșu, et al. "Corrosion Behavior and Mechanical Properties of Zn–Ti Alloys as Biodegradable Materials." Metals 14, no. 7 (2024): 764. http://dx.doi.org/10.3390/met14070764.

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The influence of the chemical composition and structural state of Zn–Ti alloys on corrosion behaviour and mechanical properties was studied. Zn-based alloys were investigated, more precisely, pure technical Zn and Zn with 0.10, 0.25 and 1.00 wt.% Ti. The microstructure and chemical composition of these materials were analysed using light optical microscopy (LOM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). The chemical composition of the alloys and the surface after immersion were analysed using an EDS detector from Bruker. The al

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Wu, Yuchin, Samer M. Adeeb, M. John Duke, David Munoz-Paniagua, and Michael R. Doschak. "Compositional and Material Properties of Rat Bone after Bisphosphonate and/or Strontium Ranelate Drug Treatment." Journal of Pharmacy & Pharmaceutical Sciences 16, no. 1 (2013): 52. http://dx.doi.org/10.18433/j3c59h.

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Purpose. We investigated elemental strontium and/or bisphosphonate drug incorporation upon the compositional and biomechanical properties of vertebral bone, in a rat model of Osteoporosis secondary to ovariectomy. Methods. Six month old female rats were ovariectomized (OVX) and divided into untreated OVX-Vehicle, OVX-RIS (Risedronate bisphosphonate [BP] treated), OVX-SrR (Strontium Ranelate [Protos®] treated), combination OVX-RIS+SrR, and sham-operated controls. After 16 weeks of treatment, rats were euthanized and lumbar vertebra were dissected. Micro-Computed Tomography (micro-CT), Electron

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Talimian, A., R. Limbach, D. Galusek, and L. Wondraczek. "Hardness and scratch resistance of chemically strengthened alkali-borosilicate thin glass." Journal of the American Ceramic Society 107 (April 8, 2024): 5212–23. https://doi.org/10.1111/jace.19804.

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Chemical strengthening of glass represents a standard technology for fabricating damage-resistant protective covers. Still, little attention has been paid to modifications in the tribological properties of ion-exchanged glass surfaces. This work reports on scratch testing of a chemically strengthened alkali-borosilicate thin glass. Diffusive Na+/K+-ion exchange produces a residual surface compressive layer with compressive stress of 200–340 MPa and layers depths between 16 and 50 µm, depending on exchange temperature and treatment time. This leads to notable changes in the surface

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Rahman, Asif, Tadafumi Adschiri, and Mohammed Farid. "Microindentation of Microencapsulated Phase Change Materials." Advanced Materials Research 275 (July 2011): 85–88. http://dx.doi.org/10.4028/www.scientific.net/amr.275.85.

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Due to the small size of microcapsules (1-1000 µm) used in a large number of applications, the individual rupture force of an individual particle has been difficult to obtain. A new technique involving nanomechanical testing was used in this study. We propose a standard method of testing the individual rupture force of Micronal®DS5008 microcapsules with an average size of approximately 11.2µm. Microcapsules were subjected to compressive force testing to determine the amount of force required to rupture the microcapsules. In order to find the mechanical properties of these microcapsules a stand

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Wähnert, Dirk, Konrad L. Hoffmeier, Yves Stolarczyk, Rosemarie Fröber, Gunther O. Hofmann, and Thomas Mückley. "Evaluation of a Customized Artificial Osteoporotic Bone Model of the Distal Femur." Journal of Biomaterials Applications 26, no. 4 (2010): 451–64. http://dx.doi.org/10.1177/0885328210367830.

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In the development of new implants biomechanical testing is essential. Since human bones vary markedly in density and geometry their suitability for biomechanical testing is limited. In contrast artificial bones are of great uniformity and therefore appropriate for biomechanical testing. However, the applied artificial bones have to be proved as comparable to human bone. An anatomical shaped artificial bone representing the distal human femur was created by foaming polyurethane. To get a bone model with properties of osteoporotic bone a foam density of 150 kg/m3 was used. The biomechanical pro

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Spitsen, R., D. Kim, B. Flinn, M. Ramulu, and E. T. Easterbrook. "The Effects of Post-Weld Cold Working Processes on the Fatigue Strength of Low Carbon Steel Resistance Spot Welds." Journal of Manufacturing Science and Engineering 127, no. 4 (2005): 718–23. http://dx.doi.org/10.1115/1.2034514.

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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 po

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Fang, Jiao-Jiao, and Li-Ming Shen. "Compression Property of TPEE-3D Fibrous Material and Its Application in Mattress Structural Layer." Polymers 15, no. 18 (2023): 3681. http://dx.doi.org/10.3390/polym15183681.

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Thermoplastic poly(ether/ester) elastomer (TPEE) has great potential as a mattress material due to its high resilience, breathability, and light weight. This study aimed to evaluate the feasibility of TPEE-3D fibrous material (T3DF), a three-dimensional block material made of TPEE fibers randomly aligned and loop-connected, for mattress application. After testing the compression properties of T3DF, the effects of T3DF structural layers on mattress firmness were investigated. The results showed that T3DF had good energy absorption capacity, broad indentation hardness range (126.94–333.82 N), an

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