Influence of residual thermal stresses on fatigue crack growth life of discontinuous reinforcements in metal matrix composites. Issue 1 (9th June 2016)

• Record Type: Journal Article
• Authors: Tevatia, A; Srivastava, S K
• Is Part Of: Fatigue & fracture of engineering materials & structures. Volume 40:Issue 1(2017:Jan.)
• Page Start: 81
• Page End: 88
• Publication Date: 2016-06-09
• Subjects: cyclic plastic zone -- fatigue crack growth -- fatigue life prediction -- large scale yielding -- residual thermal stresses; Materials -- Fatigue -- Periodicals; Fracture mechanics -- Periodicals; 620.1123
• DOI: 10.1111/ffe.12477
• Languages: English
• ISSNs: 8756-758X

Abstract

Abstract: The fatigue life prediction model based on crack propagation from micro‐structural features is derived and presented for planar and randomly oriented Discontinuous Reinforced Metal Matrix Composites (DRMMCs). The model contains the influence of micro‐structural properties such as aspect ratio, volume fraction of particle/fibre and constraint between particle and the matrix. The effect of residual thermal stresses generated within the matrix during development of composite is considered. The particle/fibre plays a dominant role in the development of the cyclic plastic zone size ahead of the crack tip; moreover, it enhances the cyclic plastic deformation characteristics of DRMMC. The theoretical model‐based evaluations for low cycle fatigue in DRMMCs are within the proximity of the experimental results.