摘要
为了定量分析特定环境中煤系砂岩在冲击荷载作用下的应变率效应,采用分离式霍普金森压杆试验装置对砂岩开展动态压缩试验。试验表明:其峰值应力和应变、耗能密度都具有明显的应变率效应;另外其破碎程度随着应变率的增加而逐渐变大,由劈裂破坏过渡到粉碎性破坏。
In order to quantitatively analyze the strain rate effect of coal-bearing sandstone under impact loading in a specific environment,dynamic compression tests were conducted on sandstone using a detached Hopkinson compression bar test apparatus.The tests showed that:its peak stress and strain,energy dissipation density have obvious strain rate effects;in addition,its fragmentation degree gradually becomes larger with the increase of strain rate,and transitions from cleavage damage to crushing damage.
作者
牛龙华
Niu Longhua(School of Civil Architecture,Anhui University of Science and Technology,Huainan 232001,China)
出处
《科学技术创新》
2022年第22期111-114,共4页
Scientific and Technological Innovation
关键词
能量耗散
应变率
破碎程度
Energy dissipation
Strain rate
Degree of fragmentation
