摘要
岩石在高应变率下的破坏类型及动态强度理论是工程爆破中的一个重要的基本问题。以往研究岩石的破坏类型只停留在静载作用下,而其强度理论也多采用静态强度理论。作者利用SHPB装置对常见的四种岩石进行了大量冲击试验。结果表明,岩石在冲击载荷作用下破坏分为四种类型:压剪破坏、拉应力破坏、拉应变破坏和卸载破坏,而且其破坏强度随冲击速度的提高而提高。
The fialure patterns and dynamic strength theory of rock is an important problem in engineering blasting.The failure patterns of rock was formerly only studied on the bases of static loading and the static strength theory was adopted.A large amount of impact test was carried out on four kinds of common rock by using SHPB.Results shown that the rock failure under impact loading are classified into four patterns,i.e. compress shearing damage,tensile stress damage,extensible strain damage and unloading damage,and the rock damage strength increases with increasing impact velocity.Finally,the strength theory of rock are discussed. [
出处
《爆破器材》
CAS
北大核心
2000年第1期1-5,共5页
Explosive Materials
关键词
岩石
破坏模式
强度
动载作用
工程爆破
rock,high strain rate,failure pattern,strength theory,SHPB
