适合于带裂纹柱体扭转的裂纹尖端奇异元素  

A Crack Tip Isoparametric Element Suitable for Torsional Bar With Cracks

作　　者：范秀昌[1,2] 吴月明[1,2] 

机构地区：[1]天津理工学院 [2]天津财经学院

出　　处：《应用力学学报》1997年第2期105-109,共5页Chinese Journal of Applied Mechanics

摘　　要：给出一个适合于带纵向裂纹柱体圣维南扭转的等参数元素，即在裂纹尖端具有ｒ－１／２奇异性的“１／４”八结点等参数元素。利用这个尖端元素，配合以本文作者在参考文献［２］中引入的八结点等参数元素，对含有径向纵裂纹的圆柱体进行了扭转计算。In this paper, we shall give an isoparametric element suitable for St. Venantstorsional bar with vertical cracks. It is quarter point isoparametric element which possesses the singularity of order r -1/2  at crack tip. Using this element and cooperating with the eight point isoparametric element introduced by the author of this paper in reference 2, we have completed the calculation of St. Venants torsion for a cylinder with a radial vertical crack.

关 键 词：奇异有限元 圣维南扭转 断裂力学 柱体 

分 类 号：O346.1[理学—固体力学]