|
Advances in Aircraft and Spacecraft Science Volume 5, Number 3, May 2018 , pages 295-318 DOI: https://doi.org/10.12989/aas.2018.5.3.295 |
||
|
Thermo-elastic analysis of rotating functionally graded micro-discs incorporating surface and nonlocal effects |
||
Farzad Ebrahimi and Ebrahim Heidari
|
||
| Abstract | ||
| This research studies thermo-elastic behavior of rotating micro discs that are employed in various micro devices such as micro gas turbines. It is assumed that material is functionally graded with a variable profile thickness, density, shear modulus and thermal expansion in terms of radius of micro disc and as a power law function. Boundary condition is considered fixed-free with uniform thermal loading and elastic field is symmetric. Using incompressible material\'s constitutive equation, we extract governing differential equation of four orders; to solution this equation, we utilize general differential quadrature (GDQ) method and the results are schematically pictured. The obtained result in a particular case is compared with another work and coincidence of results is shown. We will find out that surface effect tends to split micro disc\'s area to compressive and tensile while nonlocal parameter tries to converge different behaviors with each other; this convergence feature make FGIMs capable to resist in high temperature and so in terms of thermo-elastic behavior we can suggest, using FGIMs in micro devices such as micro turbines (under glass transition temperature). | ||
| Key Words | ||
| rotating micro discs; functionally graded incompressible materials; thermo-elastic analysis | ||
| Address | ||
| Farzad Ebrahimi and Ebrahim Heidari: Department of Mechanical Engineering, Faculty of Engineering, Imam Khomeini International University, Qazvin, Iran | ||
