Plastic Properties Determination Method for Power-Law Hardening Material Using Plural Triangular Pyramid Indenters
Plastic Properties Determination Method for Power-Law Hardening Material Using Plural Triangular Pyramid Indenters
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使用多个三角锥压头的幂律硬化材料塑性测定方法
DOI：
10.1299/kikaia.70.1529
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
N. Chiba
中科院分区：
文献类型：
--
作者：
N. Ogasawara;Wakako Makiguchi;N. Chiba
本文提出了一种由两个尖锐微压痕试验确定服从幂律硬化规律的弹塑性材料常数的方法。基于从三维有限元模拟确定的相似性函数，它示出，对于多个三棱锥压头具有不同的顶角的代表性应变的唯一值对应于每个顶角。由有限元模拟结果得到的σ_（？）-E ~*/σ_r曲线可以表示为弹性解和刚塑性/理想塑性解两个解析极值之间的插值。基于这些结果，我们提出了一种新的方法来确定幂律硬化材料常数，利用两个三角锥压头具有不同的顶角。本文还提出了一种确定代表应变值的简单方法。
A determination method for elastic-plastic material constants that obey the power-law hardening rule, from a couple of sharp micro-indentation tests, is proposed. Based on a similarity function that is determined from the three-dimensional FE simulation, it is shown that for plural triangular pyramid indenters with different apex angles unique values of representative strain correspond to each apex angle. It is also shown that Π versusE*/σr plot, which is constructed from FE simulation result, can be expressed as an interpolation between two analytical extremes : the elastic solution and the rigid/perfectly plastic solution. Based on these results, we propose a new method for determination of power-law hardening material constants, utilizing two triangular pyramid indenters with different apex angles. A simple method for determining the value of representative strain is also proposed.