Investigating the influence of Silicon-Carbide reinforcement percentage on creep behavior in Aluminum-Based functionally graded material rotating discs: A finite element study

The effect of silicon-carbide reinforcement percentage on the creep behavior of a rotating disc with an aluminum base functionally graded material (FGM) has been investigated in the present study. Rotating discs are an essential part of industrial equipment. Usually, these discs work at high temperatures and rotational speeds, so studying the creep behavior in these components is considered necessary and unavoidable. In this research, the steady state creep behavior was performed using the Norton's constitutive equation on three rotating discs with 20 vol.% average reinforcing by numerical method based on finite element. The distribution of silicon carbide particles in the disc is linear, from 25 to 35 weight percentages in the inner radius and 16.8 to 10.4 weight percentages in the outer radius, with the aluminum matrix. The material properties, such as modulus of elasticity, Poisson's ratio, and density, are modeled linearly and functionally based on the weighted fraction of the steady-state creep response using Norton's power law. A new technique based on the changes in material properties with respect to temperature has been used to model FGMs. Analytical results from the literature have been used to verify the study method and numerical solutions. The results of this study indicate a small difference between the analytical and numerical solutions and the high creep resistance is achieved by increasing the reinforcing percentage distribution in the inner radius and decreasing it in the outer radius.