Modelling the nanomechanical response of a micro particle-matrix system for nanoindentation tests.
Modelling the nanomechanical response of a micro particle-matrix system for nanoindentation tests.
复制标题
模拟用于纳米压痕测试的微米颗粒基体系统的纳米力学响应。
DOI：
10.1088/0957-4484/27/19/195703
复制
发表时间：
2016
期刊：
影响因子：
3.5
通讯作者：
Cao Y
中科院分区：
文献类型：
--
作者：
Cao Y
关于基材如何影响纳米压痕测试的涂层/基材系统的测量硬度和弹性模量，已经进行了大量的实验、数值模拟和分析建模工作。关于微粒基体系统弹塑性行为的研究还很少。 Clifford 等人提出了一种经验模型来描述嵌入线弹性基体中的线弹性颗粒的纳米压痕测试期间的空间相关复合模量。然而，还没有为弹塑性复合材料开发这样的模型。在这项研究中，有限元模拟用于确定嵌入软基体中的硬颗粒的弹性模量和硬度，反之亦然。开发了扩展的克利福德模型来确定具有各种颗粒形状和体积分数的弹塑性复合材料的弹性模量和硬度。
A lot of experimental, numerical simulation and analytical modelling work has been done on how the substrate affects the measured hardness and elastic modulus of the coating/substrate system for nanoindentation tests. Little work has been done on the elastic–plastic behaviour of micro particle–matrix systems. Clifford et al have proposed an empirical model to describe the spatially dependent composite modulus during nanoindentation tests for linear elastic particles embedded in a linear elastic matrix. However, no such models have been developed for elastic–plastic composites. In this study, finite element simulations were used to determine the elastic modulus and hardness of hard particles embedded in a soft matrix and vice versa. An extended Clifford model has been developed to determine the elastic modulus and hardness for elastic–plastic composites with various particle shapes and volume fractions.