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The Fatigue Behaviour of Metal–matrix Composites under Single Overloads

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The fatigue crack growth response of Ti-based metal–matrix composites (MMCs) under single overloads was investigated. Extensive debonding and failure of bridging fibres were confirmed to be the major controlling mechanisms accelerating crack growth after peak overloads. Numerical predictions show that the fatigue damage severity is increased when the overload is applied at shorter crack lengths. Finally, extensive debonding and failure of bridging fibres was corroborated with a fatigue damage map to provide design guidelines.

Keywords: Constraint effect degradation; Fatigue damage map; Metal–matrix composites; Micro-mechanical modelling

Document Type: Research Article

Affiliations: SIRIUS, Department of Mechanical Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK

Publication date: December 1, 1998


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