Surface and nonlocal effects on thermo-elastic analysis of rotatingmicro discs made of functionally graded incompressible materials
Publish Year: 1396
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
MECHAERO02_398
تاریخ نمایه سازی: 13 شهریور 1396
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 cansuggest, using FGIMs in micro devices such as micro turbines (under glass transition temperature).
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Authors
Ebrahim Heidari
Department of Mechanical Engineering, Imam Khomeini International University, Qazvin, Iran
Farzad Ebrahimi
Department of Mechanical Engineering, Faculty of Engineering, Imam Khomeini International University, Qazvin