Abstract
In this paper, the shape optimization of bi-material single-lap joints is performed. First, the free-edge stress singularity and condition for its disappearance near the vertex of bonding edges in single-lap joints are investigated theoretically. With this knowledge, two initial shapes of the single-lap joint in optimum design are considered. The corresponding shape-optimization approaches are proposed on the basis of sequential linear programming. In numerical computation, the strength of single-lap joints can be improved significantly by using the presented optimum technique. Furthermore, the influences of material properties, lap length and critical value of intensity of stress singularity on the strength and optimum design shapes are investigated. The general characteristic in the optimum design shapes is discussed. These computational results provide much information for the optimum design of single-lap joints.
Published Version
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