ABSTRACT
In the present work, an effort has been made to study the effect of variation in linear particle gradient (PG) on the steady-state creep behavior in anisotropic disc made of functionally graded material disc (FGM) with hyperbolic thickness. In the anisotropic FGM disc, the content of silicon carbide particles decreases linearly from the inner radius to the outer radius of the disc. The creep response of the anisotropic disc under stresses developing due to rotation at 15,000 rpm has been determined by Sherby’s law. The creep parameters of the anisotropic FGM disc vary along the radial distance due to varying composition. The creep behavior of anisotropic disc is expressed by a threshold stress with the value of stress exponent as 8. The study reveals that in the FGM disc, the radial stress increases throughout the disc with an increase in PG, whereas the stresses (tangential and effective) increase near the inner radius but decrease near the outer radius. By employing higher PG in anisotropic FGM disc with hyperbolic thickness, the distribution of steady-state strain rates becomes more uniform compared to an anisotropic disc having uniform 70reinforcement distribution. Thus, the care to introduce PG in anisotropic FGM disc should be taken for an optimal design of composite disc.
