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论文类型：期刊论文

发表时间：2016-08-01

发表刊物：COMPUTERS & STRUCTURES

收录刊物：SCIE、EI、Scopus

卷号：172

页面范围：1-10

ISSN号：0045-7949

关键字：Eigen expansion; Composite structure; Weak form; Civil engineering

摘要：The failure of structures made of multiple materials is often caused by bimaterial interface cracks. Due to the complex nature of the stress field around the interface crack tip, the faithful modeling of such cracks requires numerical methods with high accuracy and stability. For this purpose, an enriched element is proposed in this study. The element's interior fields are described only by using the Williams eigen solutions. The element's stiffness matrices for both plane and antiplane deformations are proven to be independent of its size, and the fracture parameters can be obtained accurately for a wide range of mesh densities. (C) 2016 Elsevier Ltd. All rights reserved.