基于三相滞后热传导模型的功能分级聚合物微板谐振器热弹性阻尼尺寸分析

IF 1.7 4区 工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Wei Peng, Xu Zhang, Tianhu He, Yaru Gao, Yan Li
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引用次数: 0

摘要

石墨烯纳米颗粒(GPLs)等纳米复合材料具有优异的热机械性能,已被制成高效谐振器。此外,热弹性阻尼(TED)作为一种主要的内在耗散机制,是优化高性能微/纳米谐振器的一大挑战。然而,由于没有考虑尺寸相关效应和热滞后效应的影响,经典的 TED 模型在微米/纳米尺度上失效。为了填补这些空白,本研究旨在基于修正耦合应力理论(MCST)和三相滞后(TPL)热传导模型,研究用 GPL 加固的功能分级(FG)聚合物微板谐振器的 TED 分析。考虑了四种 GPL 分布模式,包括 UD、FG-O、FG-X 和 FG-A 模式分布,并基于 Halpin-Tsai 模型评估了平板型纳米复合材料的有效力学性能。建立了基尔霍夫微板模型中的能量方程和横向运动方程,然后用复频法求解了 TED 的解析解。详细讨论了材料长度尺度参数、相位滞后参数和 GPL 总重量分数等各种参数对 TED 的影响。结果表明,修改后的参数对 TED 的影响非常明显。本文为高性能微谐振器的设计提供了一种估算 TED 的理论方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Size-dependent thermoelastic damping analysis of functionally graded polymer micro plate resonators reinforced with graphene nanoplatelets based on three-phase-lag heat conduction model
Nanocomposite materials, such as graphene nanoplatelets (GPLs), have been fabricated into high-efficient resonators due to the excellent thermo-mechanical properties. In addition, thermoelastic damping (TED), as a dominant intrinsic dissipation mechanisms, is a major challenge in optimizing high-performance micro-/nano-resonators. Nevertheless, the classical TED models fail on the micro-/nano-scale due to not considering the influences of the size-dependent effect and the thermal lagging effect. To fill these gaps, the present work aims to investigate TED analysis of functionally graded (FG) polymer microplate resonators reinforced with GPLs based on the modified couple stress theory (MCST) and the three-phase-lag (TPL) heat conduction model. Four patterns of GPL distribution including the UD, FG-O, FG-X, and FG-A pattern distributions are taken into account, and the effective mechanical properties of the plate-type nanocomposite are evaluated based on the Halpin-Tsai model. The energy equation and the transverse motion equation in the Kirchhoff microplate model are formulated, and then, the analytical solution of TED is solved by complex frequency method. The influences of the various parameters involving the material length-scale parameter, the phase-lag parameters, and the total weight fraction of GPLs on the TED are discussed in detail. The obtained results show that the effects of the modified parameter on the TED are pronounced. This paper provides a theoretical approach to estimate TED in the design of high-performance micro-resonators.
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来源期刊
Mathematics and Mechanics of Solids
Mathematics and Mechanics of Solids 工程技术-材料科学:综合
CiteScore
4.80
自引率
19.20%
发文量
159
审稿时长
1 months
期刊介绍: Mathematics and Mechanics of Solids is an international peer-reviewed journal that publishes the highest quality original innovative research in solid mechanics and materials science. The central aim of MMS is to publish original, well-written and self-contained research that elucidates the mechanical behaviour of solids with particular emphasis on mathematical principles. This journal is a member of the Committee on Publication Ethics (COPE).
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