Abstract
A mathematical model is developed to analyse creep in a variable thickness functionally graded rotating disc yielding according to Tresca criterion. The results obtained are compared with those estimated using von Mises criterion. The tangential and radial stresses, using Tresca criterion, are observed to be slightly higher, except those noticed near the inner and outer disc radii. The Tresca criterion yields lower values of effective stress as compared to Mises criterion. However, the Tresca criterion estimates higher values of strain rates in the disc as compared to Mises criterion, with maximum variation noticed at the inner radius. Thus, the FGM disc designed using Tresca yield criterion is more conservative than that designed according to von Mises criterion.
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