STRESS SINGULARITIES IN TIPS OF THREE-DIMENSIONAL ANISOTROPIC MULTI-MATERIAL WEDGES

In order to determine the stress singularity in tips of three-dimensional anisotropic multi-material wedges, a special one-dimensional finite element approach was proposed to determine the stress singularity at the interface wedge of the bonded dissimilar anisotropic materials in a generalized plane strain state. Based on the principle of minimum total potential energy, the problem of determinating the stress singularity is changed to a problem in a circumferential coordinate system through the coordinate transformation and variable separation technology. A three-node one-dimensional isoparametric quadrilateral element was used to mesh the degenerated linear region. The numerical results agree with the analytical solutions very well, which indicates that the proposed approach has high efficiency and accuracy.