NUMERICAL ANALYSIS OF THREE-DIMENSIONAL FRACTURE SPACING IN LAYERED ROCKS BY PARALLEL COMPUTING
Spacing of opening-mode fractures in a layered system is an important research topic in mechanical engineering, civil engineering and material science. Biaxial stretch tests by using parallel computing are conducted to investigate the influence of heterogeneity and principal stress ratio on evolution of polygonal fracture patterns in layered rocks in this paper. The work is implemented by using a numerical code RFPA3D based on parallel FEM solution and the damage theory. A three-dimensional parallel FEM module and the interface between Linux and Windows XP modules are developed and successfully applied to the analysis of rock progressive failure process. Numerical simulations reproduce the observed phenomenon of fracture nucleation, propagation, infilling and saturation in layered rocks. The numerically obtained fracture patterns also show a continuous pattern transition from parallel fractures, laddering fracture to polygonal fractures, which depends strongly on the far-field loading conditions in terms of principal stress ratio. Heterogeneity in rocks will lead to different modes of crack initiation, propagation and coalescence process. The agreement between numerical simulations and observations is a significant step forward for understanding fracture spacing dynamics of layered materials.
ZHENGZHAO LIANG CHUNAN TANG LIANCHONG LI TIANHUI MA
School of Civil and Hydraulic Engineering Dalian University of Technology, 116085, P.R.China
国际会议
三亚
英文
251-254
2009-05-24（万方平台首次上网日期，不代表论文的发表时间）