Distinctive features of thermoelastic dissipation in microbeam resonators at nanoscale

In this work, thermoelastic damping in microbeam resonators is evaluated using the generalized thermoelasticity theory based on the dual-phase-lagging thermal conduction model with relaxation between temperature increment and thermal expansion. An explicit formula of thermoelastic damping has been d...

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Bibliographic Details
Published inJournal of thermal stresses Vol. 39; no. 3; pp. 360 - 369
Main Authors Guo, F. L., Jiao, W. J., Wang, G. Q., Chen, Z. Q.
Format Journal Article
LanguageEnglish
Published Philadelphia Taylor & Francis 03.03.2016
Taylor & Francis Ltd
Subjects
Damping
Dual-phase-lagging model
Energy dissipation
generalized thermoelasticity
Mathematical models
Microbeams
Nanostructure
Resonators
Stress relaxation
Thermal energy
Thermal expansion
thermoelastic damping
Thermoelasticity
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Summary:In this work, thermoelastic damping in microbeam resonators is evaluated using the generalized thermoelasticity theory based on the dual-phase-lagging thermal conduction model with relaxation between temperature increment and thermal expansion. An explicit formula of thermoelastic damping has been derived. Influences of various affecting factors on thermoelastic damping, such as the beam height, aspect ratio, and relaxation time between temperature increment and thermal expansion, are examined. Numerical results show that the thermoelastic damping, obtained by the generalized thermoelasticity theory in the present study, exhibits distinctive features at nanoscale. This work reveals that non-Fourier thermal conduction and relaxation between temperature increment and thermal expansion may play a nonnegligible role at nanometer scale.
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ISSN:0149-5739
1521-074X
DOI:10.1080/01495739.2015.1125653