Intelligent Shape Design for Reduction of Free-Edge Singular Stress.

Shape optimization is applied to dissimilar material joints to decrease free-edge singular stress using a CAE system of finite element-based shape optimization programs. The optimum shape of a joint with an interlayer is similar to the case of that without an interlayer. It is revealed that the free-edge singular stress decreases in the optimum shape. Shape optimization is a useful method for designing dissimilar material joints from the point of view of decreasing singular stress.