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Effect of Pile-up in Nanoindentation of Micro and Nano crystalline Ni using FEM

Published online by Cambridge University Press:  01 February 2011

Raja Mahesh Pothapragada ,
Reza A. Mirshams  and
Suman Vadlakonda
Raja Mahesh Pothapragada
Affiliation:
University of North Texas, Denton, Texas 76203
Reza A. Mirshams
Affiliation:
University of North Texas, Denton, Texas 76203
Suman Vadlakonda
Affiliation:
University of North Texas, Denton, Texas 76203
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Abstract

A much better understanding of the contact mechanics can be obtained through finite element modeling. The experimentally determined tip shape function was included to reproduce the same contact area for a given contact depth as in the experiment. The fundamental material properties affecting pile-up are the ratio of the effective modulus to yield stress Eeff/Y and the work hardening rate.

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