摘要
提出了钙质砂在载荷作用下同时存在颗粒破碎和滑移两种变形机制,二者分别采用弹性损伤模型和边界面塑性模型予以描述,在模型中考虑颗粒损伤率对峰值应力比的影响。计算发现,围压和固结应力比增加使声发射活动增强,进而从微观机制上分析了原因。
It is presented that the particle slides and itself is damaged simultaneously when loading,which are described by boundary surface plastic model and elastic damaged model respectively, the influence of particle failure on peak stress ratio is considered. Computation shows acoustic emission rises if the confining pressure and consolidation stress ratio increased, further it is discussed from micro-mechanism.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2003年第5期822-825,共4页
Rock and Soil Mechanics
基金
国家九五攻关课题资助研究 (No. 97-926-03-02)。
关键词
声发射
颗粒破碎
损伤
边界面
acoustic emission
particle failure
damage
boundary surface
