Limit angular speed of L-FGM rotating disk for both temperature dependent and temperature independent mechanical properties

Abstract

Abstract The necessity of weight saving, and high strength at elevated temperatures in a rotating disk motivates researchers to study FGM, to overcome such restrains effectively metal-ceramic graded disk is found superior among other classifications. The present study was carried out for uniform thickness FG rotating disk by employing variational formulation method considering radial displacement field as unknown variable. Temperature variation was considered along radius, Halpin–Tsai method was used to calculate effective Young’s modulus for two cases namely; temperature dependent (TD) and temperature independent (TID). Effective yield stress variation was calculated to obtain accurate limit angular speed for the above mentioned cases. Yield stress variation was plotted along with other stresses to identify yield location. From results it was found that for L-FGM disk, limit speed decreases as aspect ratio increase, a comparison of limit speed with TD and TID properties is also reported.