CREEP MODELLING IN A COMPOSITE ROTATING DISC WITH THICKNESS VARIATION IN THE PRESENCE OF RESIDUAL STRESS
Nishi Gupta1, Pankaj Thakur2, Satya Bir Sing1
1)Punjabi University Patiala, Department of Mathematics, Punjab, India
2)ICFAI University, Faculty of Science and Technology, Dept. of Mathematics, Solan, Himachal Pradesh, India,
In the presence of residual stress in an isotropic / anisotropic disc, the nature of radial strain rate changes from compressive to tensile, particularly in the middle region of the disc with linear thickness as compared to the disc without residual stresses. Further, the magnitude of residual stress effect in the anisotropic disc is significantly lower as compared to those for the isotropic disc. For designing a rotating disc with linear thickness operating at elevated temperature, the presence of residual stress needs attention from the point of view of steady state creep rate. Although, the effect of residual stress on the steady state creep rate in the anisotropic disc is observed to be significantly lower than that observed in the isotropic disc.
Keywords: creep, rotating disc, residual stress, composites