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首页> 外文期刊>Journal of thermal stresses >Thermoelastic damping in nonlocal rod using three-phase lag heat conduction model
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Thermoelastic damping in nonlocal rod using three-phase lag heat conduction model

机译：使用三相滞后导热模型在非读度杆中的热弹性阻尼

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摘要

This manuscript studies thermoelastic damping of a longitudinally vibrating nanorod at small-scale. The heat conduction in the present work is constructed based on the three phase-lag heat conduction model and the elastic effects are modeled using nonlocal elasticity. Isothermal and adiabatic type of thermal boundary conditions are considered in the numerical analysis. It is found that the thermoelastic damping of the present resonator under adiabatic thermal boundary conditions is higher than that of the isothermal boundary conditions. The nonlocal elasticity gives higher thermoelastic damping than the classical elasticity. The present results are in good agreement with those of the available literature. Thermoelastic damping for clamped-clamped nanorod vibrating in longitudinal mode is 83% higher than that of the clamped-free nanorod for both adiabatic and isothermal boundary conditions. The critical length of nanorod at which the thermoelastic damping is maximum, is lower for the adiabatic condition than isothermal condition. The energy dissipation occurs at very fast rate at higher values of thermal relaxation parameters and more clearly this effect is seen for nanorod with less than 100 nm length. The numerical results presented in this work are useful for the design of the next generation nanoscale devices based on longitudinal resonators.
机译：该稿件在小规模上研究纵向振动纳米棒的热弹性阻尼。基于三相滞后导热模型构建本工作中的热传导，并且使用非局部弹性建模弹性效果。在数值分析中考虑了等温和绝热类型的热边界条件。发现本谐振器在绝热性热边界条件下的热弹性阻尼高于等温边界条件的热弹性阻尼。非局部弹性比经典弹性更高的热弹性阻尼。目前的结果与可用文献符合良好。用于纵向模式的夹紧夹持纳米棒的热弹性阻尼比用于绝热和等温边界条件的无夹持式纳米棒高83％。热弹性阻尼最大值的纳米棒的临界长度较低，绝热条件低于等温条件。能量耗散在热弛豫参数的较高值下以非常快的速率发生，并且对于少于100nm的纳米棒可以看到这种效果。本作工作中提出的数值结果对于基于纵向谐振器的下一代纳米级器件设计是有用的。

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