Debonding of short fibres among particulates in a metal matrix composite |
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| Institution: | 1. Structural Optimization and Mechanics Group, Department of Precision and Microsystems Engineering, Faculty of Mechanical, Maritime and Materials Engineering, Delft University of Technology, Mekelweg 2, Delft 2628 CD, The Netherlands;2. Department of Mechanical Engineering, TOBB University of Economics and Technology, Sö?gütözü, Ankara 06560, Turkey;1. Structural Optimization and Mechanics Group, Department of Precision and Microsystems Engineering, Faculty of Mechanical, Maritime and Material Engineering, Delft University of Technology, Mekelweg 2, Delft 2628 CD, The Netherlands;2. Department of Mechanical Engineering, TOBB University of Economics and Technology, Sög?ütözü, Ankara 06560, Turkey |
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| Abstract: | A numerical analysis is carried out for the development of damage by fibre–matrix debonding in aluminium reinforced by aligned, short SiC fibres. A unit cell-model that has earlier been applied to study materials with arrays of transversely staggered fibres is here extended to contain a number of differently shaped fibres or particulates in each unit cell, thus representing debonding of a relatively long discontinuous fibre among particulates that do not debond. Interfacial failure is modelled in terms of a cohesive zone model that accounts for decohesion by normal separation as well as by tangential separation. It is found that the evolution of failure can depend rather strongly on the distribution of particulates around a fibre subject to debonding. |
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