Thermoelastic damping analysis of size-dependent nano-resonators considering dual-phase-lag heat conduction model and surface effect

doi:10.1016/j.ijheatmasstransfer.2021.120977

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	Thermoelastic damping analysis of size-dependent nano-resonators considering dual-phase-lag heat conduction model and surface effect
	Shi, Shuanhu 1,3; He, Tianhu 2; Jin, Feng 3
刊名	International Journal of Heat and Mass Transfer
	2021-05-01
卷号	170
关键词	Damping Energy dissipation Heat conduction Nanotechnology Resonators Thermoelasticity Analytical expressions Critical thickness Elastic theory Heat conduction models Non-Fourier heat conduction Small scale effects Theoretical approach Thermoelastic damping
ISSN号	0017-9310
DOI	10.1016/j.ijheatmasstransfer.2021.120977
英文摘要	Thermoelastic damping (TED) is one of the main energy dissipation sources of high performance resonators at room temperature, however, the classical TED model fails at the nano-scale due to the influence of small scale effect. In this paper, a novel TED model is proposed to estimate the impact of both mechanical and thermal small scale effects on TED of nano-resonators. The surface elastic theory and the dual-phase-lag heat conduction model (DPL model) are first combined to establish the TED model. Analytical expression of the TED model is derived, which can reduce to the classical TED model. In numerical simulations, a critical thickness is proposed to identify the influence of small scale effect on TED. Small scale effect significantly improves TED of resonators within the critical thickness, which however can be neglected as the resonator thickness is greater than the critical thickness. Moreover, surface effect has stronger effect than non-Fourier heat conduction on improving TED of nano-resonators. Additionally, influences of the other key factors on TED are examined in detail. This paper provides a more reasonable theoretical approach to estimate TED in the design of high performance nano-resonators. © 2021
WOS研究方向	Thermodynamics ; Engineering ; Mechanics
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000641140400015
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147735]
专题	研究生院
作者单位	1.School of Mechanical Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China; 2.School of Science, Lanzhou University of Technology, Lanzhou; 730050, China 3.State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'an Jiaotong University, Xi'an; 710049, China;
推荐引用方式 GB/T 7714	Shi, Shuanhu,He, Tianhu,Jin, Feng. Thermoelastic damping analysis of size-dependent nano-resonators considering dual-phase-lag heat conduction model and surface effect[J]. International Journal of Heat and Mass Transfer,2021,170.
APA	Shi, Shuanhu,He, Tianhu,&Jin, Feng.(2021).Thermoelastic damping analysis of size-dependent nano-resonators considering dual-phase-lag heat conduction model and surface effect.International Journal of Heat and Mass Transfer,170.
MLA	Shi, Shuanhu,et al."Thermoelastic damping analysis of size-dependent nano-resonators considering dual-phase-lag heat conduction model and surface effect".International Journal of Heat and Mass Transfer 170(2021).