J0402-2-7 Evaluation of The Intensity of Singular Stress Field at The Vertex in Three-Dimensional Three-Layered Bonded Joints

Abstract

A mismatch of different material properties in joints may cause stress singularities at the edge of the interface, which lead to the failure of the bonding part in structures. Therefore. it is important for the bonding strength of the joints to estimate three-dimensional stress sigularity at the vertex. In the present study, a boundary element method is used for evaluating the intensity of stress singularity. Model for analysis is composed of Si, resin and FR-4.5. Influence of the open angle from the side surface on the singular stress field at the vertex under an external load is investigated.