Towards crack paths simulations in media with a random fracture energy

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:184

Article; Proceedings Paper

Jeulin, Dominique^1,2 

[1] PSL Res Univ, ParisTech, Ctr Math Morphol, 35 Rue St Honore, F-77300 Fontainebleau, France

[2] Ctr Mat, 63-65 Rue Henri Auguste Desbrueres, F-91100 Corbeil Essonnes, France

关键词: Fracture energy;    anisotropy;    crack path;    crack initiation;    phase field;    Fourier transform;   

DOI  :  10.1016/j.ijsolstr.2019.06.017

来源: Elsevier

【 摘 要 】

Simple probabilistic models of fracture of 3D polycrystals involving transgranular and intergranular cracks are proposed, based on undamaged paths and appropriate percolation thresholds. In a second part, we propose theoretical extensions of phase field models for crack initiation and propagation to the case of locally heterogeneous and anisotropic fracture energy, and their implementation to get full field solutions by means of iterations of Fourier transforms to replace the standard finite element approach. (C) 2019 Elsevier Ltd. All rights reserved.

【 授权许可】

Free