Creep Analysis of a Variable Thickness Rotating FGM Disc using Tresca Criterion

Influence of anisotropy on creep in functionally graded variable thickness rotating disc

“…The thickness and reinforcement profile of the disc employed in this study are schematically depicted in Figure 1. The values of different parameters used in this investigation are kept the same as used in previous work 7 and are summarized below in Table 1.…”

“…The reason for selecting k =−0.6 (equation (1)) and m =−1.8295 (equation (2)) is owing to the fact that corresponding to these values the creep rates induced in varying thickness FGM disc are noticed to be minimum, as reported in our earlier work. 7…”

“…Creep analysis of a rotating disc of composed of functionally graded materials (FGMs) has been the subject of numerous investigations due to its application in structural components like disc brakes and turbine rotors. 1–9 The use of FGMs in applications involving stringent thermo-mechanical loadings helps in reducing the stresses and deformations, which enhances the useful service life of engineering components. 2–4,6–14 It is possible due to flexibility of tailoring the distribution of reinforcement in a certain spatial direction in the FGM structures, so as to attain the desired variation of the required properties.…”

“…1–9 The use of FGMs in applications involving stringent thermo-mechanical loadings helps in reducing the stresses and deformations, which enhances the useful service life of engineering components. 2–4,6–14 It is possible due to flexibility of tailoring the distribution of reinforcement in a certain spatial direction in the FGM structures, so as to attain the desired variation of the required properties. 15…”

“…The literature on the analysis of creep in rotating functionally graded discs reveals that by radially varying the disc profile, its performance could be significantly improved in comparison to constant thickness FGM disc. 3,7,9 Most of the reported works concerning creep analysis of rotating FGM disc assumed the material of the disc (Al-SiC) to be isotropic, and accordingly used either von-Mises 1–4 or Tresca 7,9 yield criterion to model its creep response. However, in case the disc is made of short-fiber or whisker reinforced FGMs, the assumption of isotropy will be no longer valid.…”