作者
P Sudharshan Phani, WC Oliver, GM Pharr
发表日期
2021/9/1
期刊
Journal of the Mechanics and Physics of Solids
卷号
154
页码范围
104527
出版商
Pergamon
简介
Indentation testing is a well-known method to measure the rate dependence of the strength of materials at small scales through a variety of different testing methodologies. In many cases, a power-law creep constitutive relationship relating the indentation strain rate to the hardness, or the mean pressure applied to the material by the indenter, is assumed. However, this method of analysis does not explicitly include elastic effects, which for some testing methods may be significant. In this work, a new method of analysis that explicitly considers the elastic effects is presented. The conditions and materials for which the elastic contribution is non-negligible are identified, and simple closed-form analytical expressions are developed to account for the elastic effects. This leads to improvements in the measurement of power law creep parameters such as the stress exponent and creep coefficient. Experimental assessment of …
引用总数
学术搜索中的文章