Numerical modeling of wing crack propagation accounting for fracture contact mechanics

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:204

Article

Hau Dang-Trung¹  Keilegavlen, Eirik¹  Berre, Inga¹ 

[1] Univ Bergen, Dept Math, Postboks 7803, N-5020 Bergen, Norway

关键词: Fracture propagation;    Wing crack development;    Shear slip;    Adaptive remeshing;    Linear elastic fracture mechanics;    Contact mechanics;   

DOI  :  10.1016/j.ijsolstr.2020.08.017

来源: Elsevier

【 摘 要 】

As a consequence of shearing, wing cracks can emerge from pre-existing fractures. The process involves the interaction of sliding of the existing fracture surfaces and the tensile material failure that creates wing cracks. This work devises a numerical model to investigate how wing cracks emerge, propagate and connect pre-existing fractures under shear processes. A mathematical and numerical model for wing crack propagation based on linear elastic fracture mechanics that also accounts for fracture contact mechanics is presented. Computational efficiency is ensured by an adaptive remeshing technique. The numerical model is verified and validated through a comparison of the analytical and experimental results. Additional numerical examples illustrate the performance of the method for complex test cases where wing-cracks develop for multiple pre-existing and interacting fractures. (C) 2020 The Authors. Published by Elsevier Ltd.

【 授权许可】

Free