Thermoelastic damping of graphene nanobeams by considering the size effects of nanostructure and heat conduction

被引：51

作者：

Deng, Weiming ^{[1
]}

Li, Li ^{[1
]}

Hu, Yujin ^{[1
]}

Wang, Xuelin ^{[1
]}

Li, Xiaobai ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Mech Sci & Engn, State Key Lab Digital Mfg Equipment & Technol, Wuhan 430074, Hubei, Peoples R China

来源：

JOURNAL OF THERMAL STRESSES | 2018年 / 41卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Graphene; nonlocal strain gradient theory; phaselagging and nonlocal effect; quality factor; thermoelastic damping; STRAIN GRADIENT THEORY; DEPENDENT ELASTIC PROPERTIES; WALLED CARBON NANOTUBES; WAVE-PROPAGATION; VIBRATION ANALYSIS; MECHANICAL RESONATORS; THERMAL-CONDUCTIVITY; BUCKLING ANALYSIS; NONLOCAL STRESS; BEAMS;

D O I：

10.1080/01495739.2018.1466669

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Thermoelastic damping of nanobeams by considering the size effects of nanostructure and heat conduction is studied herein. The size effect of nanostructure is investigated based on Euler-Bernoulli beam assumptions in the framework of nonlocal strain gradient elasticity, and the size dependence of heat conduction is taken into account by incorporating phase-lagging and nonlocal effects. Closed-form solutions of thermoelastic damping and quality factor characterized by thermoelastic coupling are derived. Graphene nanoribbon is chosen as a nanobeam. The effects of relaxation time, aspect ratio, elastic modulus, thermal expansion, and thermal conductivity on quality factor of graphene nanobeams are discussed in detail.

引用

页码：1182 / 1200

页数：19

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