Shape Optimization for Reducing Stress at Ceramics/Metal Joints(Mechanics, Strength & Structural Design)

概要

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Due to the brittleness and poor machinability, ceramics is used in the form of composite structure with metals. However, stress concentration occurs at the region near the edge of interface between ceramics and metal. Such high stress may cause cracking of ceramics under thermal loads and reduce strength against external loads. In general, the stress concentration greatly depends on the geometry or the shape of the parts. The authors investigated the possibility of reducing stress concentration through controlling the shape of joint. For this purpose, the problem is treated as an optimization problem and a shape optimization procedure is proposed. Further, it is applied to simple example problems, which can be considered as linear thermal-elastic problems, to show that the proposed optimization technique can be an useful tool to design shapes of joints between dissimilar materials.
大阪大学の論文