... specified residual stress remains in the body, the material hardness and the corresponding indentation depth at the inception of fully plastic deformation are examined for the first time. It is found that the hardness is remarkably dependent on the value of residual stress, especially for materials...

... in select biological materials that include bone, dentitional tissues, and a variety of woods. Our results indicate that woods are an order of magnitude more anisotropic than hard tissues and apatites. Finally, based on the available data, it is found that the anisotropy in human femur increases by over 40...

... the microstructure and normative properties (hardness and toughness) to be used as input parameters. Potential for attaining this goal has been provided by a recent constitutive model, devised by Deshpande and Evans (DE) [2008, “Inelastic Deformation and Energy Dissipation in Ceramics: A Mechanics-Based Dynamic...

... . Measurement results will be used to fit the material model described in this paper. Simple shear specimen Four different natural rubber mixtures have been investigated, with various amounts and types of carbon-black and thus showing different hardness. The mixtures are named after their hardness...

... at loading as in such a case self-similarity prevails. This is a very good approximation for ceramic/metallic composites but may not be so when the composite consists of two materials of roughly equal hardness. An approximate compliance formula for describing this feature is proposed showing good agreement...

... facets due to a crystalline structure. Meanwhile, the second indenter has a triangular pyramidal form. In the simulation, it is assumed that the hardness of the indenter’s diamond tip far exceeds that of the thin copper film, and hence indenter deformation may be neglected during the indentation process...

... 93106-5070, and will be accepted until four months after final publication of the paper itself in the ASME JOURNAL OF APPLIED MECHANICS . 11 July 2001 28 Feb 2002 31 10 2002 buckling finite element analysis shear deformation fracture hardness vibrations laminates...

... indentation deformation hardness elastoplasticity mechanical contact The elastic-plastic contact of a sphere and a flat is a fundamental problem in contact mechanics. It is applicable, for example, in problems such as particle handling ( 1 ), or sealing, friction, wear, and thermal and electrical...

...W. W. Gerberich; N. I. Tymiak; J. C. Grunlan; M. F. Horstemeyer; M. I. Baskes For very shallow indentations in W, Al, Au, and Fe-3wt%Si single crystals, hardness decreased with increasing depth irrespective of increasing or decreasing strain gradients. As such, strain gradient theory appears...

... representation. Hence, it is a matter of uncertainty to claim equivalence of the two plate formulations in actual computations. resonance hardness bending Galerkin method indentation cracks crystallographic shear 2002 ASME ...

.... 5, 2001. Associate Editor: L. T. Wheeler. 08 May 2001 05 Oct 2001 20 06 2002 indentation anisotropic media thermoelasticity Laplace transforms elastic constants thermal stresses damping hardness bending composite materials Time-dependent thermal...

... indentation hardness damping crack-edge stress field analysis elastoplasticity stress-strain relations resonance ageing Bessel functions yield strength anisotropic media Measurement of hardness involves loading a hard sphere, cone, or pyramid indenter into the surface of a material...