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Abstract <p>Thermoelastic damping (TED) is an important factor in modeling and designing of micro-/nanoscale devices. The present study proposes to study thermoelastic damping in piezothermoelastic beam at nanoscale using nonlocal modified couple stress theory (NMCST) which is a combination of Eringen’s nonlocal elasticity theory and modified couple stress theory. Coupled thermoelastic equations are derived using NMCST based on Euler-Bernoulli beam theory. The complex frequency approach has been used to solve the coupled equations and thermoelastic damping has been obtained for piezothermoelastic nanobeam under simply suppoted-simply supported (SS) boundary condition. The results obtained are compared to those obtained from classical continuum and heat conduction theories. MATLAB software has been used to discuss the results graphically.</p>

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Dual Phase Lagging in Piezothermoelastic Nanobeam Resonator Utilizing Nonlocal Modified Couple Stress Theory

  • 期刊论文

  • 发表日期：

    2025年8月26日

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  • Arti,
  • Ravinder Kumar Sahrawat,
  • Krishan Kumar

摘要

Abstract

Thermoelastic damping (TED) is an important factor in modeling and designing of micro-/nanoscale devices. The present study proposes to study thermoelastic damping in piezothermoelastic beam at nanoscale using nonlocal modified couple stress theory (NMCST) which is a combination of Eringen’s nonlocal elasticity theory and modified couple stress theory. Coupled thermoelastic equations are derived using NMCST based on Euler-Bernoulli beam theory. The complex frequency approach has been used to solve the coupled equations and thermoelastic damping has been obtained for piezothermoelastic nanobeam under simply suppoted-simply supported (SS) boundary condition. The results obtained are compared to those obtained from classical continuum and heat conduction theories. MATLAB software has been used to discuss the results graphically.