摘要
在岩石材料的加载过程中,当荷载超过某一临界值时,岩石的变形从稳定变形阶段突变为不稳定变形阶段,即使是保持荷载不变,破裂也会继续发展,表现为“雪崩”式的破坏过程。基于自组织临界性理论及沙堆元胞自动机模型,对岩石失稳破坏过程中的损伤演化、裂纹扩展规律进行了探讨,从新的角度研究了岩石失稳破坏的细观演化规律。
During loading process, deformation of rock will come into an unstable stage if the load is above a critical value. That is, the failure will evolve continuously under constant load. An ‘avalanche’ phenomenon appears in the failure process of rock. Based on SOC theory and BTW model, the damage evolvement and crack propagation rate are studied on instability and failure of rock. This presents a new approach to research the mesoscope evolvement law of rock failure.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2005年第6期986-989,1008,共5页
Rock and Soil Mechanics
基金
国家自然科学基金(50374084)
重庆市应用基础研究项目(编号:8015).
关键词
岩石
失稳
破坏
沙堆模型
rock
instability
failure
BTW model
