Indentation of self-similar indenters: An FEM-assisted energy-based analysis
Indentation of self-similar indenters: An FEM-assisted energy-based analysis
复制标题
DOI：
10.1016/j.jmps.2014.02.002
复制
发表时间：
2014-05
影响因子：
5.3
通讯作者：
F. Pöhl;S. Huth;W. Theisen
中科院分区：
文献类型：
--
作者：
F. Pöhl;S. Huth;W. Theisen
在这项研究中，基于能量的方法是用来推导两个独立的参数的载荷-位移曲线（C和W EL/W总）和力学性能的路德维希幂律材料（E，K，和n）之间的一般关系。该方法使用传统的连续介质力学来描述弹性和塑性区，包括它们的平均应变和压痕引起的体积。它不考虑压痕尺寸效应，这是由于在塑性区内的位错成核，因为它是由Nix和Gao（1998）开发的模型所描述的。基于能量的方法与有限元模拟相结合，可以深入了解压痕过程中复杂的变形过程以及材料参数与压痕结果之间的关系。结果进行了讨论和解释的上下文中解决的正向和反向压痕问题的自相似压头。
In this study, an energy-based approach is used to derive general relationships between two independent parameters of the load–displacement curve (C and W el/W tot) and the mechanical properties of Ludwik-power law materials (E, K, and n). The approach uses conventional continuum mechanics to describe the elastic and plastic zone including their mean strains and volumes induced by indentation. It does not account for the indentation size effect which is owed to the nucleation of dislocations within the plastic zone, as it is described by the model developed by Nix and Gao (1998). The energy-based approach in combination with FEM simulations give an insight into the complex deformation processes during indentation and the relationships between the material parameters and the indentation results. The results are discussed and interpreted in the context of solving the forward and inverse indentation problem for self-similar indenters.