Abstract
Ceramic/metal bimaterials systems are increasingly used in industry owing to the synergetic association of opposite properties of the bonded materials. Discontinuity in these properties can result in crack initiation and stress concentration entailing the bimaterial system failure. A good understanding of damage mechanism at the metal/ceramic interface is crucial to the dimensioning of multilayered systems. In this work the finite element method is used to analyze the stress concentration effect in a linear interface and curved interface. The geometrical configuration of the interface has a great influence the stress concentration on distribution developed near or in the assembly interface. The effect of a circular notch on the behavior of an interfacial crack is highlighted. The results indicate that the interface generates normal and tangential stress concentration resondless of the assembly mechanical properties. The curved geometry of the interface strongly reduces stress concentration in comparison with the linear interface. The reduction is 90%.
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