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

机译：考虑纳米结构的尺寸效应和热传导对石墨烯纳米束的热弹性阻尼

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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.
机译：本文研究了通过考虑纳米结构的尺寸效应和热传导对纳米束的热弹性阻尼。基于Euler-Bernoulli束假设，在非局部应变梯度弹性的框架内研究了纳米结构的尺寸效应，并通过结合了相位滞后和非局部效应来考虑导热的尺寸依赖性。推导了以热弹性耦合为特征的热弹性阻尼和品质因数的封闭形式解。选择石墨烯纳米带作为纳米束。详细讨论了弛豫时间，长宽比，弹性模量，热膨胀和热导率对石墨烯纳米束品质因数的影响。

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  • 来源
    《Journal of thermal stresses》 |2018年第9期|1182-1200|共19页
  • 作者

    Deng Weiming; Li Li; Hu Yujin; Wang Xuelin; Li Xiaobai;

  • 作者单位

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

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

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

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

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

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Graphene; nonlocal strain gradient theory; phaselagging and nonlocal effect; quality factor; thermoelastic damping;

    机译：石墨烯;非局部应变梯度理论;相位滞后和非局部效应;品质因数;热弹性阻尼;

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