Abstract
The development of stress and strain fields in a metal bond layer between two ceramics is determined numerically for tensile loading normal to the layer. Apart from small regions near free edges of the specimen it is found that the elastic-plastic deformations in the metal layer follow closely a state of uniaxial straining, with the associated development of a high level of triaxial tension. This uniaxial strain state is used in a cell model analysis to study ductile failure in the metal layer by the growth of cavities at initially unbonded spots on the interface. For small isolated interface cavities the results are related to recent studies of cavitation instabilities in elastic-plastic solids subject to highly triaxial stress states. The predictions of the analyses are also discussed in relation to recent experimental results for metal bond layers between ceramics.
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