Results 121 to 130 of about 15,501 (158)

SMALL DEPTH INDENTATION OF UHMW (POLYETHYLENE)

Transactions of the Canadian Society for Mechanical Engineering, 1995
Indentation tests based on the local deformation of UHMW-Polyethylene plastic material by harder indenters were conducted using a designed apparatus which detects precisely the first contact between the tip of the indenter and the sample. The same rig was used to perform creep and recovery tests on this material to measure the yield strength and Young’
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Correction of indentation load–depth curve based on elastic deformation of sharp indenter

Mechanics of Materials, 2014
Abstract Indenters in numerical analyses are usually assumed rigid. For rigid indenters, the ratios of Kick’s law coefficient to elastic modulus (C/E) are equal for materials with equal values of yield strain (eo) and strain hardening coefficient (n).
Minsoo Kim, Sungsik Bang, Felix Rickhey, Hyungyil Lee   +3 more
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Effect of the friction between a point-sharp indenter and an indented elastoplastic solid on the load and depth sensing indentation

Materials Today: Proceedings, 2019
Abstract The effect of the friction coefficient μ between a point-sharp indenter and an indented elastoplastic solid on nanoindentation behavior is examined quantitatively in a wide range of μ with varying the elastoplasticity of the solids through the numerical analysis of nanoindentations simulated with the finite element method.
Takashi Akatsu, Keisuke Yokota, Yutaka Shinoda, FUMIHIRO WAKAI   +3 more
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The Analysis of Depth-Sensing Indentation Data

MRS Proceedings, 1993
ABSTRACTCommon methods for analyzing depth-sensing indentation data are briefly reviewed and an overview of the principal factors limiting the accuracy and precision of results obtained using these methods is presented. The largest deviations from the elastic contact models used to interpret depth-sensing indentation data arise from time-dependent ...
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Methods of correction for analysis of depth-sensing indentation test data for spherical indenters

Journal of Materials Research, 2001
Depth-sensing indentation testing has proven extremely useful in the determination of mechanical properties of thin films and small volumes of material. However, the validity of the results obtained depend largely on the corrections made to the experimentally recorded data to account for initial penetration depth, nonuniformities in indenter shape, and
A. C. Fischer-Cripps, A. Bendeli, T. J. Bell, J. S. Field, A. K. Jamting   +4 more
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Effects of Surface Stress on the Load-Depth Curves of Depth-Sensing Indentation

MRS Proceedings, 2004
ABSTRACTBased on the effects of residual surface stress on the unloading curves of indentation load-depth responses, an experimental scheme for determination of the residual stress by depth-sensing indentation is proposed. From the point that the elastic unloading portion of the load-depth curves can be expected to be unaffected by the residual ...
Q. Wang, K. Ozaki
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Lesion Depth and Microhardness Indentations on Artificial White Spot Lesions

Caries Research, 2009
In this paper the relation between the average lesion depth (1) of artificial carious lesions and the length of microhardness indentations (D) on the surface (the load perpendicular to the surface) is investigated. The results show that an empirical linear relationship does exist between 1 and D for both human and bovine enamel.
ARENDS, J, SCHUTHOF, J, JONGEBLOED, WG
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A new consideration on spherical depth sensing indentation

Materials Letters, 2008
This work evaluates the influence of the pile up or sink in phenomena onto the values of elastic modulus determined by instrumented indentation tests with spherical tips on different metallic materials. A new procedure for the determination of this property is proposed, based on the hypothesis of contact radius constancy during the unloading process ...
M.A. Garrido Maneiro, J. Rodríguez
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Use of combined elastic modulus in depth-sensing indentation with a conical indenter

Journal of Materials Research, 2003
Conventional methods of analysis for depth-sensing indentation test data use the slope of the elastic unloading portion of the load–displacement response in conjunction with the elastic equations of contact for a rigid cone. It is common practice to incorporate the combined modulus of the indenter and specimen in these equations although the validity ...
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Cyclic Depth-Sensing Indentation of Gold Wire

Key Engineering Materials, 2008
Conventional depth-sending indentation and novel cyclic indentation were performed to study the mechanical properties and strengthening mechanism of pure gold and Ca-doped gold of up to 90 ppm. The system was chosen because it is popular materials for microelectronics interconnection, yet the strengthening mechanism is not well-understood. Conventional
Thirumany Sritharan, T. Saraswati, S. Mhaisalkar   +2 more
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