Simulation of the Hertzian contact damage in ceramics

Details Simulation of the Hertzian contact damage in ceramics Simulation of the Hertzian contact damage in ceramics

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003msmse..11..477l&link_type=abstract

Modelling and Simulation in Materials Science and Engineering, Volume 11, Issue 4, pp. 477-486 (2003).

Physics

Condensed Matter

Materials Science

1

Scientific paper

Ceramic materials under contact loading are damaged by two main mechanisms. Unstable crack growth and material failure are found in tension stress regions, whereas nucleation and growth of microcracks occur in pressure stress regions. A continuum mechanics material model is discussed, which describes the effective material behaviour of such microcrack fields. Simulations of the damage behaviour are carried out for the spherical indentation test. Different modifications of the model are examined and it is shown that the best adjustment to experimental measurements is achieved with a shear stress-dependent evolution equation for the damage process. The basic ideas of the nucleation of microcracks in pressure stress regions could be confirmed.

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