Relation between Loading Rate and Fracture Velocity on Limestone

作者：Ajay Kumar Jha

摘要：The relation between loading rate and fracture velocity is the key to determining the fracture toughness of rock mass under dynamic loading.While designing an optimal blast design for any limestone mines,understanding the relationship between blast detonation pressure and rock fragmentation can increase the energy utilisation in any limestone mine blast.The detonation pressure is directly related to dynamic loading rate and fracture velocity is directly related to stress wave propagation speed during blasting.This paper discusses the relationship between dynamic loading rate and fracture velocity for limestone samples.It was observed that crack propagation velocity increases with fracture toughness of rock samples.It may be concluded that as the dynamic loading increases,the fracture velocity increases.

发文机构：BioID GmbH

关键词：FracturevelocitysplitHopkinsonpressurebar(SHPB)loadingrate

分类号： TG1[金属学及工艺—金属学]