Alexandria Engineering Journal ( IF 6.8 ) Pub Date : 2020-07-20 , DOI: 10.1016/j.aej.2020.06.047 Hamdy M. Youssef , Alaa.A. El-Bary
Thermal and mechanical relaxation times play essential roles in the thermal quality factor of the micro-resonators, where controls the energy damping through the coupling of thermal and mechanical behavior. In this work, we developed an analytical mathematical model that assumed a pre-stress in a two-temperature micro-viscothermoelastic resonator of silicon to modify the thermal and mechanical relaxation times and thus increase the thermal quality factor. The impacts of length-scale and pre-stress on the thermal quality factor have been discussed. The present model predicts that significant enhancement in terms of thermal quality factors is enabled by tuning the static-pre-stress, the thermal and mechanical relaxation times parameters. The isothermal value of frequency and the two-temperature parameter have impact effects on the thermal quality factor of the micro-resonators.
中文翻译:
基于双相滞后热传导的静态预应力引起的两温微粘热弹性谐振器的热品质因数表征
热和机械弛豫时间在热品质因数中起着至关重要的作用 微谐振器,通过热和机械行为的耦合来控制能量衰减。在这项工作中,我们开发了一个分析数学模型,该模型假设硅的两温微粘热弹性谐振器中存在预应力,以修改热和机械弛豫时间,从而提高热品质因数。讨论了长度尺度和预应力对热品质因数的影响。本模型预测,通过调整静态预应力,热和机械弛豫时间参数,可以显着提高热品质因数。频率的等温值和两个温度参数对微谐振器的热品质因数有影响。