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Modes of deformation and weak boundary conditions in wedge indentation

Published online by Cambridge University Press:  25 April 2012

Narayan Sundaram ,
Yang Guo  and
Srinivasan Chandrasekar
Narayan Sundaram*
Affiliation:
Center for Materials Processing and Tribology, Purdue University, West Lafayette, Indiana 47907-2023
Yang Guo
Affiliation:
Center for Materials Processing and Tribology, Purdue University, West Lafayette, Indiana 47907-2023
Srinivasan Chandrasekar
Affiliation:
Center for Materials Processing and Tribology, Purdue University, West Lafayette, Indiana 47907-2023
*
Address all correspondence to Narayan Sundaram at[email protected]
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Abstract

We study strain fields and deformation patterns produced by wedge indentation of metals using high-resolution imaging, image correlation and simulation. A long-standing problem associated with simulation of narrow angle wedge indentation is overcome by introducing a weak form of the symmetry boundary conditions. The simulated deformation fields show good agreement with experiment. Based on strain localization, three distinct modes of deformation largely cover the range of wedge angles. Importantly, narrow angle wedge indentation is characterized by intense strain localization at points close to the free surface and thus offers a possible new tool to probe strain gradient effects.

Type
Research Letters
Information
MRS Communications , Volume 2 , Issue 2 , June 2012 , pp. 47 - 50
Copyright
Copyright © Materials Research Society 2012

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