山东建筑大学学报2025，Vol.40Issue(6)：9-15,7.DOI:10.12077/sdjz.2025.06.002
冲击荷载作用下花岗岩动态力学性能及能量耗散特征研究
Study on dynamic mechanical properties and energy dissipation characteristics of granite under impact load
摘要
Abstract
The mechanical properties and energy dissipation behavior of rock under impact loading differ significantly from those under static loading.Investigating the dynamic failure mechanisms of rock provides new insights for engineering blasting design.In this study,granite was selected as the research object,and impact tests were conducted using a Split Hopkinson Pressure Bar(SHPB)system.The stress-strain curve,macroscopic failure patterns and energy dissipation characteristics of granite under conventional uniaxial impact were analyzed.Based on the energy balance theory,an energy storage efficiency parameter was introduced to evaluate the energy storage capacity of granite.The results show that under uniaxial impact loading,the stress-strain curve of granite rapidly enters the elastic stage,followed by a dominant plastic deformation stage,and finally transitions into the failure stage.With increasing strain rate,evolves from an intact state to a fractured state,and ultimately to a pulverized state.The incident,reflected,transmitted,and absorbed energies all increase linearly with strain rate.The proposed energy storage efficiency enables a quantitative analysis of the energy dissipation behavior of granite over time.关键词
冲击荷载/应变率效应/能量耗散/储能效率/破坏形态Key words
impact load/strain rate effect/energy dissipation/energy storage efficiency/failure morphology分类
交通工程引用本文复制引用
CHEN Yunjuan,DUAN Hongjie,JIANG Meng,ZHANG Huifu,SU Jiarui..冲击荷载作用下花岗岩动态力学性能及能量耗散特征研究[J].山东建筑大学学报,2025,40(6):9-15,7.基金项目
国家自然科学基金面上项目(42172310) （42172310）
泰山学者工程专项经费资助项目(tsqn202408226,tsqn202312192) （tsqn202408226,tsqn202312192）
