A comparison of 3D finite element simulations for Berkovich and conical indentation of fused silica
by Sanghoon Shim, W.C. Oliver, G.M. Pharr
International Journal of Surface Science and Engineering (IJSURFSE), Vol. 1, No. 2/3, 2007

Abstract: Much of our understanding of elastic-plastic contact mechanics as it relates to the interpretation of nanoindentation data comes from two-dimensional, axisymmetric finite element simulations of conical indentation. In many instances, conical results adequately describe real experimental results; however, there are instances where conical simulations fail to capture important behaviour. Three-dimensional finite element simulations of Berkovich triangular pyramidal indentation of fused silica are compared to similar simulations with a 70.3º cone. It is shown that a potentially significant difference between the two indenters exists for the contact areas and contact stiffnesses. Implications for the interpretation of nanoindentation data are discussed.

Online publication date: Wed, 05-Sep-2007

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