Equilibrium morphology of misfit particles in elastically stressed solids under chemo-mechanical equilibrium conditions
Equilibrium morphology of misfit particles in elastically stressed solids under chemo-mechanical equilibrium conditions
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DOI：
10.1016/j.jmps.2015.04.008
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发表时间：
2015-08
影响因子：
5.3
通讯作者：
Xujun Zhao;S. Bordas;J. Qu
中科院分区：
文献类型：
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作者：
Xujun Zhao;S. Bordas;J. Qu
本文研究了化学能、弹性能和界面能对二元合金在化学-力学平衡条件下相分离引起的错配粒子平衡形态的影响。一个连续的框架，管理系统的化学-力学平衡，首先开发使用变分方法，通过处理相界面作为一个尖锐的界面赋予界面过剩能量。在此基础上，结合水平集方法，提出了一种扩展有限元方法（XFEM）来模拟化学-力学耦合系统的行为。耦合化学力学模型与数值技术一起开发这里提供了一个有效的模拟工具来预测相分离合金中沉淀相的平衡形态。
This paper studies the effects of chemical, elastic and interfacial energies on the equilibrium morphology of misfit particles due to phase separation in binary alloys under chemo-mechanical equilibrium conditions. A continuum framework that governs the chemo-mechanical equilibrium of the system is first developed using a variational approach by treating the phase interface as a sharp interface endowed with interfacial excess energy. An extended finite element method (XFEM) in conjunction with the level set method is then developed to simulate the behaviors of the coupled chemo-mechanical system. The coupled chemo-mechanics model together with the numerical techniques developed here provides an efficient simulation tool to predict the equilibrium morphologies of precipitates in phase separate alloys.