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Nonlinear transient heat transfer and thermoelastic analysis of thick-walled FGM cylinder with temperature-dependent material properties using hermitian transfinite element

Azadi, M ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. DOI: 10.1007/s12206-009-0716-6
  3. Publisher: 2009
  4. Abstract:
  5. Nonlinear transient heat transfer and thermoelastic stress analyses of a thick-walled FGM cylinder with temperature-dependent materials are performed by using the Hermitian transfinite element method. Temperature-dependency of the material properties has not been taken into account in transient thermoelastic analysis, so far. Due to the mentioned dependency, the resulting governing FEM equations of transient heat transfer are highly nonlinear. Furthermore, in all finite element analysis performed so far in the field, Lagrangian elements have been used. To avoid an artificial local heat source at the mutual boundaries of the elements, Hermitian elements are used instead in the present research. Another novelty of the present paper is simultaneous use of the transfinite element method and updating technique. Time variations of the temperature, displacements, and stresses are obtained through a numerical Laplace inversion. Finally, results obtained considering the temperature-dependency of the material properties are compared with those derived based on temperature independency assumption. Furthermore, the temperature distribution and the radial and circumferential stresses are investigated versus time, geometrical parameters and index of power law. Results reveal that the temperature-dependency effect is significant. © The Korean Society of Mechanical Engineers and Springer Berlin Heidelberg 2009
  6. Keywords:
  7. FGM ; Numerical laplace inversion ; Temperature-dependency ; Thermoelastic stresses ; Thick-walled cylinder ; Transfinite element ; Transient heat transfer ; Cylinders (shapes) ; Heat exchangers ; Laplace transforms ; Materials properties ; Nonlinear equations ; Thermal effects ; Thermoelasticity ; Nonlinear analysis
  8. Source: Journal of Mechanical Science and Technology ; Volume 23, Issue 10 , 2009 , Pages 2635-2644 ; 1738494X (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s12206-009-0716-6