Abstract
The present study deals with a finite element based formulation to determine the deformation and stresses of rotating disks made of functionally graded polar orthotropic material with mechanical properties varying in radial direction. The analysis is carried out using element based gradation of material properties over the discretized domain. The element-wise grading is implemented using an in-house source code in APDL and is implemented as UDF subroutine in ANSYS. Deformation and stresses of functionally graded rotating disk with varying thickness profile and material grading along the radial and tangential directions are investigated and effects of the grading parameter and other parameters, governing the orthotropic nature of the material are studied for free-free boundary condition. The proposed method is first validated with benchmark results, it can be seen that there is a significant reduction of stresses in variable thickness disks as compared to uniform disks. Further the effects of grading parameter and other governing parameters representing degree of orthotropic are also investigated and presented.
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