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Composites: Mechanics, Computations, Applications: An International Journal
CiteScore™: 0.23 SNIP: 0.125 SJR: 1.182

ISSN Print: 2152-2057
ISSN Online: 2152-2073

Composites: Mechanics, Computations, Applications: An International Journal

DOI: 10.1615/CompMechComputApplIntJ.v3.i2.60
pages 171-188

ANALYSIS OF STEADY-STATE CREEP IN A FUNCTIONALLY GRADED ROTATING DISC OF VARIABLE THICKNESS

Manish Garg
Department of Physics, Punjabi University, Patiala-147002 (India)
B. S. Salaria
Department of Physics, Punjabi University, Patiala-147002 (India)
V. K. Gupta
Mechanical Engg., UCoE, Punjabi University, Patiala-147002 (India)

ABSTRACT

THE article presents an analysis of steady-state creep in a variable-thickness rotating disc made of functionally graded composite containing linear and nonlinear distributions of silicon carbide particles in an aluminum matrix. The composite is assumed to creep according to a threshold stress-based law. The stresses and strain rates have been calculated in the FGM discs as well as in a similar composite disc but having uniform distribution of reinforcement. The presence of a linear or nonlinear reinforcement gradient in the composite disc leads to an increase in the radial stress over the entire disc radius, however, the tangential and effective stresses increase significantly near the inner radius but decrease towards the outer radius. A nonlinear FGM disc exhibits a relatively higher amount of increase or decrease in stresses than a linear FGM or uniform disc. The magnitudes of tangential and radial strain rates in FGM discs are significantly lower than in a uniform composite disc. An FGM disc, having nonlinear distribution of reinforcement, possess the lowest and relatively uniform distribution of strain rates, thereby, it is susceptible to lesser distortion.