Reliability Evaluation of Joints of Ceramics and Metal : Consideration of Thermoelastic-Plastic Stress around the Interface of Jointed Dissimilar Materials

概要

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Development of reliable bonding techniques for ceramics and metals is considered very important for more useful applications of ceramics. Generally, however, it is a serious problem that ceramics have a high thermal stess concentration at the bonded interface, caused by the different thermal properties of the two materials. The authors have been investigating various methods for effectively decreasing the stress concentration. In this paper, we present a fundamental consideration of the thermal stress distribution characteristics of the interface of a dissimilar material joint by using thermoleastic-plastic finite-element analysis. Through this analysis, it is found that the high thermal stress is induced only in a very narrow region, and that the value of the high stress is approximately estimated by simplified theoretical analysis. Further, we found that the stress concentaration can be reduced by changing the shape of the ceramics of the joint.
一般社団法人日本機械学会の論文
1991-04-15