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Structural Engineering and Mechanics Volume 93, Number 4, February25 2025 , pages 327-342 DOI: https://doi.org/10.12989/sem.2025.93.4.327 |
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Dynamic thermal stability of a micro honeycomb-Piezoelectric sandwich porous viscoelastic graphene beam |
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Pooya Pourmousa, Ali Ghorbanpour Arani, Zahra Khoddami Maraghi, Iman Ahghari and Ahmad Reza Ghasemi
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| Abstract | ||
| The present paper investigates the dynamic thermal stability of a sandwich beam featuring a honeycomb core, intermediate piezoelectric layers, and outer porous viscoelastic graphene layers, resting on a visco-Pasternak foundation using the zigzag theory. Heat transfer within the micro honeycomb-piezoelectric sandwich porous viscoelastic graphene (H-PSPVG) beam is assumed to be transient and along its length. The properties of the viscoelastic graphene layer are determined using the Kelvin-Voigt model, while the strain gradient theory is applied to adapt relationships at the microscale. Considering the visco-Pasternak elastic medium, motion equations within the structure are derived using the energy method and zigzag theory. The Galerkin and Bolotin numerical methods are employed to solve the resulting equations for the micro H-PSPVG beam under simply supported double-ended and clamped supported boundary conditions. This research investigates the impact of small-scale parameters, temperature fluctuations, aspect ratio of length to core thickness, electrical potential, and elastic medium on the dynamic thermal stability of the micro H-PSPVG beam. Results show that increased temperature, porosity coefficient, viscosity, and a decrease in static coefficient and foundation lead to expanded stabilized regions and movement of unstable regions towards lower frequencies. These findings hold potential applications in microsensor and microgenerator fabrication. | ||
| Key Words | ||
| dynamic thermal stability; honeycomb core; Kelvin-Voigt model; piezoelectric; strain gradient theory | ||
| Address | ||
| Pooya Pourmousa, Ali Ghorbanpour Arani, Iman Ahghari, Ahmad Reza Ghasemi: Department of Solid Mechanics, Faculty of Mechanical Engineering, University of Kashan, Kashan, Iran Zahra Khoddami Maraghi: Faculty of Engineering, Mahallat Institute of Higher Education, Mahallat, Iran | ||