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论文类型：期刊论文

发表时间：2017-12-01

发表刊物：THEORETICAL AND APPLIED FRACTURE MECHANICS

收录刊物：SCIE、EI、Scopus

卷号：92

页面范围：13-23

ISSN号：0167-8442

关键字：Symplectic method; V-notched magneto-electro-elastic composites; Interface fracture; Intensity factor; Energy release rate

摘要：A simple coupled method, called "finite element discretized symplectic method" is introduced into the mode III fracture analysis of a V-notched magneto-electro-elastic (MEE) bimaterial. High-accuracy generalized intensity factors and energy release rate are computed to evaluate the singularities of mechanical, electric and magnetic fields. The present method is carried out in two steps. In the first step, the physical domain is meshed by the conventional element for MEE media and is divided into a finite size singular region near the notch tip and a regular region far away from the notch tip. In the second step, analytical symplectic eigenfunctions are employed to transform the large number of nodal unknowns in the singular region into a small set of undetermined coefficients of a symplectic series; the nodal unknowns in the regular region remain as usual. Consequently, the computational cost is enormously reduced and fracture parameters are actually the first three coefficients of the series. Explicit expressions in the singular fields are obtained simultaneously. Numerical results are compared with the existing solutions and found to be in good agreement. Some new results are given also. (C) 2017 Elsevier Ltd. All rights reserved.