Abstract
There are many jointed interfaces between dissimilar materials in micro electronic packages, micro electro mechanical systems and many structures. Fractures and delaminations often occur along these interfaces. Specially, jointed corners are main causes of fracture. In our previous studies, we developed numerical methods to analyze the stress intensity factors of two-dimensional and quasi three-dimensional jointed corners. However, three-dimensional corners sometimes became the source points of fracture and delamination. In this study, we analyzed singularity orders of three-dimensional corners using the special finite element method. Then, we analyzed scalar parameters for respective singular orders using the H-integral which based on Betti's reciprocal theorem. We could analyzed singular orders and scalar parameters of several three-dimensional corners accurately.
