Adaptive phase field simulation of quasi-static crack propagation in rocks

被引：56

作者：

Zhou, Shuwei ^{[1
,2
]}

Zhuang, Xiaoying ^{[2
,3
]}

机构：

[1] Bauhaus Univ Weimar, Inst Struct Mech, D-99423 Weimar, Germany

[2] Tongji Univ, Coll Civil Engn, Dept Geotech Engn, Shanghai 200092, Peoples R China

[3] Leibniz Univ Hannover, Inst Continuum Mech, D-30167 Hannover, Germany

来源：

UNDERGROUND SPACE | 2018年 / 3卷 / 03期

关键词：

Phase field; Adaptive scheme; Rock; Crack propagation; ARBITRARY EVOLVING CRACKS; DUAL-HORIZON PERIDYNAMICS; PHANTOM-NODE METHOD; MESHFREE METHOD; MULTIPLE FLAWS; POLYMERIC NANOCOMPOSITES; UNIAXIAL COMPRESSION; COHESIVE CRACKS; DAMAGE MODEL; SHEAR BANDS;

D O I：

10.1016/j.undsp.2018.04.006

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In this study, we present an adaptive phase field method (APFM) for modeling quasi-static crack propagation in rocks. Crack initiation due to positive strains is considered, and a numerical simulation is implemented using a commercial software, COMSOL Multi-physics. Two benchmark tests are first examined, namely, a single-edge-notched square plate subjected to respective tension and shear loadings. The crack propagation in Brazil splitting tests, 2D notched semi-circular bend (NSCB) tests, and 3D NSCB tests are subsequently simulated and analyzed. All the numerical examples indicate that the propagation of the cracks is autonomous and external fracture criteria are not required for phase field modeling. Furthermore, the adaptive remeshing scheme reduces unnecessary global mesh refinement and exhibits good adaptability for fracture modeling. The simulations are in good agreement with the experimental observations, and thereby indicate the feasibility and practicability of the APFM in rocks (even in 3D cases). (C) 2018 Tongji University and Tongji University Press. Production and hosting by Elsevier B.V. on behalf of Owner.

引用

页码：190 / 205

页数：16

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