Numerical simulation on the dynamic mechanical response and fracture mechanism of rocks containing a single hole
Zhenyu Han1
Kai Liu2
Jinyin Ma3
Diyuan Li3
1.Department of Civil Engineering,Monash University,Melbourne,VIC 3800,Australia;School of Resources and Safety Engineering,Central South University,Changsha 410083,Hunan,China2.Department of Engineering Science,University of Oxford,Parks Road,Oxford OX1 3PJ,UK3.School of Resources and Safety Engineering,Central South University,Changsha 410083,Hunan,China
摘要：Caverns and tunnels are constantly exposed to dynamic loads,posing a potentially significant threat to the safety of rock structures.To facilitate the understanding of dynamic fracture around openings,a series of discrete element models were established to numerically examine the effect of hole shape on dynamic mechanical properties and crack evolution.The results indicate that the existence of a hole greatly reduces dynamic strength,and the reduction is closely related to hole shape.The strain variation of pre-holed specimens is more complicated and even larger than the value of intact specimens.Although crack initiation differs for varying hole shapes,the entire structural collapse of specimens is controlled by macro shear cracks along the diagonal direction of the specimen,which are effectively identified by velocity trend arrows and contact force distribution.Finally,comparative analysis between failure pattern of pre-holed specimens under static and dynamic loads were conducted.
机标关键词：simulationmechanismrocksdynamicsingleholecontainingfracture
论文发表日期：2024-10-28
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：20( 16-35 )
英文信息