Journal
MECHANICS OF MATERIALS
Volume 54, Issue -, Pages 113-123Publisher
ELSEVIER
DOI: 10.1016/j.mechmat.2012.07.006
Keywords
Indentation; Mechanical properties; Uniqueness; Finite element simulation
Categories
Funding
- National Natural Science Foundation of China [11102176, 11172258, 11072208, 51172192, 10828205]
- Natural Science Foundation of Hunan Province for Innovation Group [09JJ7004]
- Key Special Program for Science and Technology of Hunan Province [2009FJ1002]
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The load-displacement curve in indentation is widely used to extract elastoplastic properties of materials. It is believed that such a measurement is non-unique and a full stress-strain curve cannot be obtained with a sharp indenter or even plural and spherical indenters. By introducing a ratio of the additional residual area to the area of a profile indenter, we proposed a new set of dimensionless functions. Based on these functions and finite element simulations, analytical expressions were derived between indentation data and elastoplastic properties. It is shown that this method can effectively distinguish highly elastic and plastic solids (Cheng and Cheng, 1999) and mystical materials (Chen et al., 2007), which provides a useful guideline for properly using the indentation technique to measure elastoplastic properties of materials with conical and pyramidal indenters. Crown Copyright (c) 2012 Published by Elsevier Ltd. All rights reserved.
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