摘要
通过棒状结构体在2种不同排列方式下的平面应变试验,研究了不同侧向应力状态下结构体的破损过程。试验结果表明:在棒状结构体的破损过程中,不仅有结构体的滑移、转动,还有结构体的破碎;低侧向应力状态时有应变软化和应力跌落现象出现,体胀和侧向挤出;高侧向应力状态时应变硬化,体缩和侧向收缩。
The plane strain compression experiments of the samples assembling of bar-like structural bodies are conducted to study the failure and breakage mechanisms of geological materials. Under different confining pressures, the breaking processes of bar-like structural bodies with two different arrangements are observed. During the breaking process of structural bodies, it is found by experiment that the structural bodies not only slide and rotate, but also break. When the confining stress is small, strain softening, rapid stress drop, volume inflation and lateral extrusion can be observed; while the confining stress is large, strain hardening, volume contraction and lateral intrusion become prevalent.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第12期2003-2008,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(10272062)
