OICC Press Journal of Solid Mechanics 2008-7683 9 4 2017 09 01 Elastic Analysis of Functionally Graded Variable Thickness Rotating Disk by Element Based Material Grading 650 662 EN A.K Thawait Department of Mechanical Engineering, Shri Shankaracharya Technical Campus, SSGI,Bhilai, (C.G.), India L Sondhi Department of Mechanical Engineering, Shri Shankaracharya Technical Campus, SSGI,Bhilai, (C.G.), India Sh Sanyal Department of Mechanical Engineering, NIT Raipur, 492010, India Sh Bhowmick Department of Mechanical Engineering, NIT Raipur, 492010, India Journal Article 2017 09 01 The present study deals with the elastic analysis of concave thickness rotating disks made of functionally graded materials (FGMs).The analysis is carried out using element based gradation of material properties in radial direction over the discretized domain. The resulting deformation and stresses are evaluated for free-free boundary condition and the effect of grading index on the deformation and stresses is investigated and presented. The results obtained show that there is a significant reduction of stresses in FGM disks as compared to homogeneous disks and the disks modeled by power law FGM have better strength.