Author(s)

H. Nguyen-Dang, A.-M. Yan & N. Moes

Abstract

Dual boundary element analysis of the multiple-cracked body H. Nguyen-Dang, A.-M. Yan & N. Moes Laboratory of Aerospace Techniques, LTAS-Fracture Mechanics, University of Liege, B-4000, Belgium ABSTRACT In this paper, a development of the application of the Dual Boundary Element Method (DBEM) to multiple-cracked body has been made. The fundamental principle of the DBEM and its effective numerical implementation to the two- dimensional problem in linear elasticity are presented. When the displacement integral equation is applied on ones of the crack surfaces and the traction integral equation on the others, general plane problem with several mixed-mode cracks can be solved with a single-region formulation. All crack surfaces are discretized with discontinuous quadratic boundary elements. The J-integral technique is used to evaluate the stress intensity factors. Several numerical examples of geometry with some edge and embedded cracks show the high accuracy and efficiency of the

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