A study of thermoelastic damping in micromechanical resonators under unified generalized thermoelasticity formulation. (June 2019)

• Record Type: Journal Article
• Authors: Kumar, Roushan; Kumar, Ravi
• Is Part Of: Noise & vibration worldwide. Volume 50:Number 6(2019)
• Page Start: 169
• Page End: 175
• Publication Date: 2019-06
• Subjects: Micromechanical resonators -- thermoelastic damping -- generalized thermoelasticity theories -- quality factor -- intrinsic dissipation; Noise control -- Periodicals; Damping (Mechanics) -- Periodicals; Soundproofing -- Periodicals; Damping (Mechanics); Noise control; Soundproofing; Periodicals; 620.205
• DOI: 10.1177/0957456519853814
• Languages: English
• ISSNs: 0957-4565

Abstract

In this article, a unified formulation for the generalized coupled thermoelasticity theories by employing an appropriate system of partial differential equations as the governing system is presented to investigate thermoelastic damping of a microbeam resonator. The generalized coupled thermoelasticity theories namely: the extended thermoelasticity proposed by Lord and Shulman, the thermoelasticity without energy dissipation (thermoelasticity type-II) and the thermoelasticity with energy dissipation (thermoelasticity type III) in a unified way by introducing the unified parameters. An explicit formula of thermoelastic damping has been derived in a unified way and numerical results for effects of the beam height, relaxation time parameter on thermoelastic damping of the microbeam resonator have been studied and compared.