STUDY ON BOUNDARY FINITE ELEMENT METHOD IN PLANE ORTHOTROPIC ELASTICITY

When the boundary clement method (BEM) is used to calculate the stresses in the neighborhood of the boundary、there are always some errors.The reason is that the boundary integrals in BEM contain singular factors.To solve this problem, a so-called boundary finite element (BFE) based on the complementary energy theorem is praposed,including four nodes BFE and eight nodes BFE, It is found that based on the solutions of BEM and using BFEM presented in this paper accurate results are obtained.