李欢
云南农业大学
Modeling crack propagation in piezoelectric composites using the multi-field coupled multiphase hybrid finite element method
A multi-field coupled multiphase hybrid finite element method (MCMHFEM) is presented to analyze and model the interface debonding and matrix cracking in fiber-reinforced piezoelectric composites under combined electrical and mechanical loading. In order to capture the stress and electric displacement singularity at the crack tip, the electromechanical 6-fold enrichment functions are added in to the assumed stress and electric displacement field in MCMHFEM. The least square method is employed to determine the generalized intensity factor. Particularly, the maximum energy release rate is suggested as a fracture criterion for fiber-reinforced piezoelectric composites. Several numerical examples were used to demonstrate the accuracy of the proposed method by comparing the piezoelectric Voronoi element model results with those obtained by ABAQUS. At last, the proposed model is used to model the initiation and propagation of various cracks in fiber-reinforced piezoelectric composites containing a large number of inclusions.
李欢,云南农业大学副教授,云南省“兴滇英才计划”青年人才。主要研究方向包括: 杂交元法关于新材料结构的断裂算法开发,多物理场合多尺度建模高性能算法开发,以及基于计算力学与机器学习结合的智能算法开发。聚焦于以上研究方向,以第一作者或通讯作者共发表SCI论文10余篇,获云南省自然科学二等奖1项(R3),主持国家自然科学基金项目2项,主持省部级项目2项。2024年获云南省“兴滇英才计划”青年人才专项项目。目前担任西南地区基础力学与工程应用协会理事长。