Thermo-mechanical coupling and size effects in micro and nano resonators

Sandeep Kumar, Tarek Alam, Md Amanul Haque

Research output: Contribution to journalLetter

8 Citations (Scopus)

Abstract

Existing models for thermoelastic damping consider geometric size effects only, the focus of this study is on tuning of thermoelastic damping with mechanical strain, which reduces both relaxation rate and thermal conductivity at the nanoscale. We developed a model that accounts for the contribution of tensile force and thermal conductivity in a clamped-clamped configuration nano-resonator. Experimentally measured thermal conductivity is then coupled with the model suggests the existence of a critical length scale (inversion point) below which quality factor increases with increase in thickness and vice versa. The nanoscale strain-thermal conductivity coupling is found to be most effective at and around this inversion point.

Original languageEnglish (US)
Article number2
JournalMicro and Nano Systems Letters
Volume1
Issue number1
DOIs
StatePublished - Dec 1 2013

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Resonators
Thermal conductivity
Damping
Tuning

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering
  • Biomaterials

Cite this

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abstract = "Existing models for thermoelastic damping consider geometric size effects only, the focus of this study is on tuning of thermoelastic damping with mechanical strain, which reduces both relaxation rate and thermal conductivity at the nanoscale. We developed a model that accounts for the contribution of tensile force and thermal conductivity in a clamped-clamped configuration nano-resonator. Experimentally measured thermal conductivity is then coupled with the model suggests the existence of a critical length scale (inversion point) below which quality factor increases with increase in thickness and vice versa. The nanoscale strain-thermal conductivity coupling is found to be most effective at and around this inversion point.",
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Thermo-mechanical coupling and size effects in micro and nano resonators. / Kumar, Sandeep; Alam, Tarek; Haque, Md Amanul.

In: Micro and Nano Systems Letters, Vol. 1, No. 1, 2, 01.12.2013.

Research output: Contribution to journalLetter

TY - JOUR

T1 - Thermo-mechanical coupling and size effects in micro and nano resonators

AU - Kumar, Sandeep

AU - Alam, Tarek

AU - Haque, Md Amanul

PY - 2013/12/1

Y1 - 2013/12/1

N2 - Existing models for thermoelastic damping consider geometric size effects only, the focus of this study is on tuning of thermoelastic damping with mechanical strain, which reduces both relaxation rate and thermal conductivity at the nanoscale. We developed a model that accounts for the contribution of tensile force and thermal conductivity in a clamped-clamped configuration nano-resonator. Experimentally measured thermal conductivity is then coupled with the model suggests the existence of a critical length scale (inversion point) below which quality factor increases with increase in thickness and vice versa. The nanoscale strain-thermal conductivity coupling is found to be most effective at and around this inversion point.

AB - Existing models for thermoelastic damping consider geometric size effects only, the focus of this study is on tuning of thermoelastic damping with mechanical strain, which reduces both relaxation rate and thermal conductivity at the nanoscale. We developed a model that accounts for the contribution of tensile force and thermal conductivity in a clamped-clamped configuration nano-resonator. Experimentally measured thermal conductivity is then coupled with the model suggests the existence of a critical length scale (inversion point) below which quality factor increases with increase in thickness and vice versa. The nanoscale strain-thermal conductivity coupling is found to be most effective at and around this inversion point.

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