A symplectic analytical singular element for the inclined crack terminating at the material interface of composite structures

12th International Conference on Damage Assessment of Structures

Hu, X.F.^1 ; Shen, Q.S.^1 ; Yao, W.A.^1

State Key Laboratory of Structural Analysis for Industrial Equipment, International Research Center for Computational Mechanics, Dalian University of Technology, Dalian

116024, China^1

关键词: Analytical singular elements;    Bi-material interface cracks;    Bimaterial plates;    Computational aspects;    Eigen-value problems;    Material interfaces;    Post processing;    Symplectic approach;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/842/1/012080/pdf
DOI  :  10.1088/1742-6596/842/1/012080

来源: IOP

【 摘 要 】

The inclined bimaterial interface crack problem is studied from theoretical and computational aspects. The original problem is transformed into an eigen value problem by using the symplectic approach, and the eigen solution are obtained. A Symplectic Analytical Singular Element (SASE), of which the interior fields are described by the obtained eigen solutions, is developed. The stress intensity factors (SIFs) can be calculated directly without any post-processing. Numerical example on a square bimaterial plate containing an inclined crack is provided to validate the proposed method. The comparison of the predicted results with the existing result indicates that the proposed method is accurate for the modelling of the inclined bimaterial interface crack.