叶宏飞

个人信息Personal Information

教授

博士生导师

硕士生导师

主要任职:力学与航空航天学院副院长

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:力学与航空航天学院

学科:工程力学. 固体力学. 计算力学. 生物与纳米力学

办公地点:综合实验1号楼506室

电子邮箱:yehf@dlut.edu.cn

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A coupling extended multiscale finite element and peridynamic method for modeling of crack propagation in solids

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论文类型:期刊论文

发表时间:2019-10-01

发表刊物:ACTA MECHANICA

收录刊物:EI、SCIE

卷号:230

期号:10

页面范围:3667-3692

ISSN号:0001-5970

摘要:A coupling extended multiscale finite element and peridynamic method is developed for the quasi-static mechanical analysis of large-scale structures with crack propagation. Firstly, a novel incremental peridynamic (PD) formulation based on the ordinary state-based PD model is derived utilizing the Taylor expansion technique. To combine the high computational efficiency of the EMsFEM and advantages of dealing with discontinuous problems of the PD, a coupling strategy based on the numerical base function is proposed, in which the displacement constraint relationships between the coarse element nodes of the EMsFEM and the material points of the PD among the coupling domain are constructed by the numerical base functions and are represented by a coupling strain energy function using the Lagrange multiplier method. Then, a bilinear softening material model is adopted to describe the damage and failure of the bond, and the incremental-iterative algorithms are applied to obtain the steady-state solutions. Finally, several representative numerical examples are presented, and the results demonstrate the accuracy and efficiency of the proposed coupling method for the quasi-static mechanical analysis of large-scale structures with crack propagation. Comparing with the single EMsFEM and PD method, the present coupling method can reduce much computational cost and well deal with crack problems, simultaneously.