Limit Elastic Analysis of E-FGM Rotating Disk with Temperature Dependent Mechanical Properties

In present work, exponential law based grading of composition is considered for high speed rotating disks and Young's modulus is calculated for two cases namely; temperature dependent and temperature independent applications.In temperature dependent applications, Young's modulus is assumed to vary with temperature as well throughout the spatial coordinates of the disk.The effective Young's modulus of FGM is then calculated using modified rule of mixture.Limit elastic analysis is performed by using variational principle.Results show the effect of temperature over stresses and obtained limit elastic speed.It is observed that limit speed first increases with an increase in aspect ratio and starts decreasing after reaching a critical value.Limit speed also increases with increase in grading index.Effective yield stress of FGM is computed and plotted along with other stresses to identify location of yielding.