Characterization of stress-strain relationships of elastoplastic materials: An improved method with conical and pyramidal indenters
Characterization of stress-strain relationships of elastoplastic materials: An improved method with conical and pyramidal indenters
复制标题
弹塑性材料应力-应变关系的表征：使用圆锥形和金字塔形压头的改进方法
DOI：
10.1016/j.mechmat.2012.07.006
复制
发表时间：
2012-11-01
影响因子：
3.9
通讯作者：
Lu, C.
中科院分区：
文献类型：
--
作者：
Ma, Z. S.;Zhou, Y. C.;Lu, C.
压痕中的载荷-位移曲线广泛用于提取材料的弹塑性特性。据信，这样的测量是非唯一的，并且利用尖锐压头或者甚至多个球形压头不能获得完整的应力-应变曲线。通过引入附加残余面积与轮廓压头面积的比率，我们提出了一组新的无量纲函数。基于这些函数和有限元模拟，推导了压痕数据和弹塑性特性之间的解析表达式。结果表明，该方法可以有效区分高弹塑性固体（Cheng and Cheng，1999）和神秘材料（Chen et al.，2007），这为正确使用压痕技术用圆锥形和金字塔形压头测量材料的弹塑性特性提供了有用的指导。 Crown 版权所有 (c) 2012 由 Elsevier Ltd 出版。保留所有权利。
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.