Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7169224 | Engineering Fracture Mechanics | 2018 | 20 Pages |
Abstract
A group of nonsingular enrichment functions is proposed for an exact representation of the cohesive stresses, which are consistent with a nonsingular asymptotic stress field around a crack tip. An improvement in the adaptive crack tip polar coordinate is proposed for treating the local polar coordinate error. Finally, a discontinuous cellular automation model was developed, including a cell model, cell state, and updating rules. Combined with these developments and the cohesive rock model, a continuous-discontinuous cellular automaton method (CDCA) for a cohesive crack analysis is proposed, through which the calculation is only limited to the cell locality without re-meshing, and therefore, no assembled global stiffness matrix is required. Numerical simulations reveal the accuracy and efficiency of the presented method.
Related Topics
Physical Sciences and Engineering
Engineering
Mechanical Engineering
Authors
Fei Yan, Xia-Ting Feng, Jia-He Lv, Peng-Zhi Pan, Shao-Jun Li,