Abstract
The study presents thermo-mechanical analysis of functionally graded (FG) rotating disc whose material properties, namely, Young’s modulus, density and coefficient of thermal expansion in radial direction are tailored from inner to outer radius using power law form. The disc is considered to be under the influence of internal pressure, centrifugal body force and thermal loading of the form linear as well as quadratic. Response of FG disc under linear and quadratic temperature profile subjected to internal pressure as well as centrifugal body force is analysed. An exact solution for stress in radial and tangential directions, under mechanical and thermal loading is presented. Numerical solutions for stresses under internal pressure with uniform thermal loading are obtained using finite element method and its comparison with analytical results is presented graphically. Results for radial displacement, radial stress and tangential stress are depicted graphically and their interpretation has been discussed.
Highlights
Graded materials (FGMs) are an advanced class of composite materials with heterogeneous composition of metal and ceramic over the volume of body
Radial stress under the influence of thermal loading is on the higher side but with introduction of internal pressure, it significantly decreases along the radius of the disc
The magnitude of radial stress with higher value tends to shift towards outer radius, due to increase in angular velocity
Summary
Graded materials (FGMs) are an advanced class of composite materials with heterogeneous composition of metal and ceramic over the volume of body. An analytical and numerical analysis for rotating FG disc under internal pressure and varying thermal load in complete linear and quadratic form is presented. It can be noted from grid independence test, that radial stress varies only with a difference in values at third decimal place whereas values of tangential stress do not vary at all.
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