Title: Effect of reinforcement gradient on steady state creep in a variable thickness rotating disc made of non-linear FGM

Authors: Manish Garg; B.S. Salaria; V.K. Gupta

Addresses: Department of Physics, Punjabi University, Patiala-147002, India ' Department of Physics, Punjabi University, Patiala-147002, India ' Mechanical Engineering, UCoE, Punjabi University, Patiala-147002, India

Abstract: Steady state creep analysis in a rotating disc with linearly varying thickness has been carried out. The disc under investigation is made of functionally graded composite containing non-linear distribution of silicon carbide particles in a matrix of pure aluminium along the radius of the disc. The creep behaviour of the disc has been described by a threshold stress-based law with a stress exponent as 5. The stresses and strain rates are estimated in the FGM disc and compared with a similar disc but having uniform distribution of reinforcement. The study reveals that the creep response of an FGM disc, in terms of strain rates, is significantly superior to a uniform composite disc. Further, by employing FGM disc with higher reinforcement, the magnitude of strain rates and extent of distortion in the disc could be reduced significantly.

Keywords: steady state creep; functionally graded materials; nonlinear FGM; rotating disc; variable thickness; reinforcement gradient; silicon carbide; aluminium; stress; strain rates; distortion.

DOI: 10.1504/IJMATEI.2013.052792

International Journal of Materials Engineering Innovation, 2013 Vol.4 No.1, pp.1 - 17

Received: 06 Feb 2012
Accepted: 03 Apr 2012

Published online: 19 Jul 2014 *

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