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
收藏
页码：1182 / 1200
页数：19
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