基于相关键元胞的岩石爆破断裂数值模拟  

Blasting Fracture Simulation of Rock Based on Correlated Lattice Bond Cell Method

作　　者：姚远[1] 张振南[1] 葛修润[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《上海交通大学学报》2016年第11期1682-1687,共6页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金(11172172);国家重点基础研究发展规划(973)项目(2011CB013505)资助

摘　　要：为研究爆破荷载作用下岩石动态断裂过程,采用相关键元胞(Correlated Lattice Bond Cell,CLBC)模型对岩石进行力学建模,提出了一种适用于岩石动态断裂过程的键势函数,该势函数同时反映了岩石的可压缩性、裂尖材料超弹性及弹脆性特征,发展了一种爆破荷载施加方法.结果表明:该方法能够再现爆破荷载作用下的动态裂纹扩展过程及其基本特征;地应力对爆生裂纹扩展方向具有较强的影响,裂纹总是倾向于沿最大地应力方向扩展;为爆破荷载作用下的岩石动态断裂模拟提供了一种简单可行的方法.To simulate the dynamic fracture process of rock under blasting,the rock was first modeled with correlated lattice bond cell（CLBC）.A bond potential specially used for the dynamic fracture propagation of rock was proposed.This bond potential can simultaneously account for the compressibility,the hyperelastic property of material at crack tip and the brittle property of rock.A loading scheme of blast was developed to simulate the blast-induced fracture behaviors of rock.The simulation results suggest that the present method can capture the features of blasting fractures.The in-situ stress has a significant effect on fracture propagation direction.The crack always tends to propagate along the maximum in-situ stress direction.It is suggested that the present method is a feasible and simple approach to the dynamic fracture simulation of rock under blasting load.

关 键 词：相关键元胞 格子模型 岩石爆破 动态断裂 数值模拟 

分 类 号：TU452[建筑科学—岩土工程]