任意多孔多裂纹板的裂纹闭合接触分析  

FRICTIONAL CONTACT ANALYSIS OF A FINITE PLATE WITH MULTIPLE ELLIPTICAL HOLES AND CLOSED CRACKS

作　　者：郭树祥[1] 许希武[1] 

机构地区：[1]南京航空航天大学航空宇航学院结构强度研究所,南京210016

出　　处：《力学学报》2006年第4期496-504,共9页Chinese Journal of Theoretical and Applied Mechanics

基　　金：江苏省自然科学基金(BK99117)教育部跨世纪优秀人才计划教育部优秀年轻教师基金资助项目.~~

摘　　要：基于摩擦接触问题的数学规划解法,采用各向异性体平面弹性理论中的复势方法,建立了含多椭圆孔及裂纹群有限大各向异性板,在任意载荷作用下裂纹闭合或局部闭合问题的有效分析方法．通过在可能闭合的裂纹边界引入互补变量函数并将其展成Fourier级数形式,以Faber级数为工具,应用保角映射技术和最小二乘边界配点法,导出无卸载情况下裂纹面摩擦接触的线性互补模型,并通过算例验证了方法的有效性．数值结果表明,由于采用级数解描述板应力场和位移场,该方法具有较高的计算精度和效率,便于研究裂纹闭合对应力强度因子等断裂参数的影响．Based on the mathematical programming procedure of the contact problem with friction and using the complex potential method in the anisotropic plane theory of elasticity, an efficient approach is presented to deal with the frictional contact of a finite anisotropic plate containing multiple elliptical holes and cracks subjected to arbitrary loads. The complementary parameters introduced to the contact boundary are expanded into Fourier series, and the linear complementary model considering the crack closure is obtained by means of the Faber series expansion, conformal mapping and the least square boundary collocation technique. Some examples are given to demonstrate the validity and effectiveness of the method. Numerical results indicate that the present method enjoys many advantages such as high accuracy, good convergence, and is convenient to be used to investigate effects of crack closure on the fracture parameters of structures.

关 键 词：裂纹群 摩擦接触 线性互补问题 应力强度因子 复势方法 Faber级数 

分 类 号：O346.1[理学—固体力学]