SEDL / STP / STP1256-EB / STP16406S

Reduction of the Stresses in a Joint of Dissimilar Materials Using Graded Materials as Interlayer

Yang, Y
University of Karlsruhe, Institute for Reliability and Failure Analysis,

Munz, D
Professor, University of Karlsruhe, Institute for Reliability and Failure Analysis and Nuclear Research Center Karlsruhe, Karlsruhe,

Pages: 15    Published: Jan 1995

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Abstract

If two dissimilar materials are joined at high temperature, very high residual stresses develop near the free edge of the interface during cooling to room temperature. In most cases, the stresses are singular for elastic material behaviour. One method to avoid the stress singularities is to introduce a graded interfacial zone with a continuous change of all material properties between the two joined components. In this paper the distribution of the stresses in FGM has been calculated by FEM. The interlayer has continuous material properties, which means that the graded interlayer has not been treated as N layers. The value of the peak stress and the location of the peak stress in the joint have been investigated.