【摘要】 带有裂纹和缺陷孔洞的板的问题是一个多连域的边值问题,这类问题适合用边界元法所具有的高精度特性来求解.采用子域边界元法,在平面应变的条件下对存在中心裂纹的平面板受远处拉伸和剪切载荷的作用进行了数值分析.研究了圆形孔洞对Ⅰ型和Ⅱ型应力强度因子的影响,与有限元法进行了对比,求解结果更加精确.计算了椭圆形孔对Ⅰ型应力强度因子的影响,得到了一些有意义的结果,并对移动接触弹性体作用下的带裂纹板进行了钻孔研究.更多还原

【Abstract】 Boundary value problem of a plate with crack and defect such as circular hole is a multi-connected domain problem. This kind of problem is suitable for solving with boundary element method due to higher precision. The sub-domain method is used in the paper, a center cracked plate subjected to remote tensile and shear loadings is computed numerically. The effect of circular hole on Mode-Ⅰ and Mode-Ⅱ stress intensity factors are studied assuming plane strain condition, the results are more precise than those by using FEM’s. The effect of elliptical hole on Mode-I stress intensity factors is studied and some significant results have been obtained. The cracked plate with a moving contact elastic body has been analyzed under the condition of drilling hole near the crack.更多还原