Title: Numerical investigation of the effect of fibre volume fraction on the stress distribution of aerospace grade Al-Li 8090 metal matrix composite

Authors: Abhaysingh M. Daphale; Chetan S. Patil; Mohd. Imran Ansari; Dineshsingh G. Thakur

Addresses: Department of Mechanical Engineering, Defence Institute of Advanced Technology (DU), Ministry of Defence, Pune, Maharashtra, 411025, India ' Department of Mechanical Engineering, Defence Institute of Advanced Technology (DU), Ministry of Defence, Pune, Maharashtra, 411025, India ' Department of Robotics & Automation Engineering, Bharati Vidyapeeth (Deemed to be University) College of Engineering, Pune, Maharashtra, 411043, India ' Department of Mechanical Engineering, Defence Institute of Advanced Technology (DU), Ministry of Defence, Pune, Maharashtra, 411025, India

Abstract: Present study deals with representative volume element (RVE) of aerospace grade Al-Li (8090) matrix alloy reinforced with SiC fibre that is produced to assess the stress distribution around the SiC fibre of SiC/Al-Li 8090 MMC subjected to the load in transverse and longitudinal direction. A square and hexagonal array of RVE has been used for this study. The deformation of the RVE and stress distribution around the fibre has been examined for 5-25% volume fraction of SiC fibre. It is observed that, for constant transverse loading, stress transfer between matrix and fibre decreases with increment in fibre volume fraction for square array whereas stress transfer between matrix and fibre is observed to be even with increment in fibre volume fraction for hexagonal array; however, the longitudinal stress decreases for both the cases. In the radial direction of SiC fibre, 5% volume fraction of the SiC fibre shows the maximum longitudinal stress.

Keywords: Al-Li (8090) alloy; SiC fibre; MMC; metal matrix composite; RVE; representative volume element; FEM; finite element method; modified stir casting; strengthening mechanism; square array; hexagonal array.

DOI: 10.1504/IJMSI.2021.125794

International Journal of Materials and Structural Integrity, 2021 Vol.14 No.2/3/4, pp.102 - 119

Received: 23 Feb 2019
Accepted: 25 Oct 2019
Published online: 29 Sep 2022 *

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