The stress concentration factors of plate welded joints have been calcu-lated by the triangular prism isoparameter elements and hexahedron isoparameter elements(8 to 21 nodes)in SAP5.
本文应用三维有限元理论，构造了一类五面体６～１５节点等参单元的形函数，提出了在五面体单元内的Ｇａｕｓｓ积分处理方法，建立了相应的单元刚度矩阵。