Three-dimensional crack initiation, propagation, branching and junction in non-linear materials by an extended meshfree method without asymptotic enrichment

Type of content
Journal Article
Thesis discipline
Degree name
Publisher
University of Canterbury. Mechanical Engineering.
Journal Title
Journal ISSN
Volume Title
Language
Date
2008
Authors
Bordas, S.
Rabczuk, T.
Zi, G.
Abstract

This paper presents a three-dimensional, extrinsically enriched meshfree method for initiation, branching, growth and coalescence of an arbitrary number of cracks in non-linear solids including large deformations, for statics and dynamics. The novelty of the methodology is that only an extrinsic discontinuous enrichment and no near-tip enrichment is required. Instead, a Lagrange multiplier field is added along the crack front to close the crack. This decreases the computational cost and removes difficulties involved with a branch enrichment. The results are compared to experimental data, and other simulations from the literature to show the robustness and accuracy of the method.

Description
Citation
Bordas, S., Rabczuk, T., Zi, G. (2008) Three-dimensional crack initiation, propagation, branching and junction in non-linear materials by an extended meshfree method without asymptotic enrichment. Engineering Fracture Mechanics, 75(5), pp. 943-960.
Keywords
Extended element free Galerkin method (XEFG), Discontinuous enrichment, Cohesive cracks, Lagrange multipliers, Dynamic fracture, Large deformations, High velocity impact
Ngā upoko tukutuku/Māori subject headings
ANZSRC fields of research
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