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Small-scale thermoelastic damping in micro-beams utilizing the modified couple stress theory and the dual-phase-lag heat conduction model

Borjalilou, V ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1080/01495739.2019.1590168
  3. Publisher: Taylor and Francis Ltd , 2019
  4. Abstract:
  5. In this article, the size-dependent behavior of micro-beams with the thermoelastic damping (TED) phenomenon is studied. The coupled thermoelasticity equations are derived on the basis of the modified couple stress theory (MCST) and dual-phase-lag (DPL) heat conduction model. By solving these coupled equations simultaneously, a closed-form expression for the TED parameter in micro-beams is presented which considers the small-scale effects incorporation. Then, the effect of various parameters on TED in micro-beams, such as micro-beam height, the type of material, boundary conditions, and aspect ratio is investigated. The results show that the influence of utilizing non-classical continuum and thermoelasticity theories on the amount of TED and the critical thickness is significant in small scales. © 2019, © 2019 Taylor & Francis Group, LLC
  6. Keywords:
  7. Micro-beams ; The dual-phase-lag heat conduction model ; The modified couple stress theory ; Thermoelastic damping ; Aspect ratio ; Damping ; Elasticity ; Thermoelasticity ; Closed-form expression ; Coupled thermoelasticity ; Heat conduction models ; Micro beams ; Modified couple stress theories ; Size dependent behaviors ; Heat conduction
  8. Source: Journal of Thermal Stresses ; Volume 42, Issue 7 , 2019 , Pages 801-814 ; 01495739 (ISSN)
  9. URL: https://www.tandfonline.com/doi/abs/10.1080/01495739.2019.1590168