双轴压缩下闭合裂纹应力强度因子的解析与数值方法

来源期刊：中南大学学报(自然科学版)2008年第4期

论文作者：杨慧 曹平 江学良 黄尚安 黎振兹 许明情

文章页码：850 - 855

关键词：双轴压缩；有限岩板；闭合裂纹；应力强度因子；摩擦因数；侧压系数；

Key words：biaxial compression; finite-rock-plate; closed-crack; stress intensity factor; friction coefficient; side pressure coefficient

摘    要：

Abstract: Model of closed-crack in finite-rock-plate under biaxial compression was established. Based on crack-line analysis method, the approximately solutions for the crack tip stress intensity factor(SIF) were deducted. The influences of friction coefficient and side pressure coefficient on crack tip stress intensity factor were analyzed. Using the finite element method, the numerical study was given to the same question. The results calculated by two methods are similar within the accuracy requirement in engineering. The ratio of crack length a and plate width W influence SIF. There exists an upper limit, i.e., a/W≤0.2. When a/W＞0.2 for the application of infinite-plate formula to calculate SIF, the rock-plate should be considered as finite-rock-plate and the influence of boundary conditions on crack tip should not be neglected.

基金信息：高等学校博士学科点专项科研基金资助项目