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Dynamic response of microelongated thermoelastic rod using Moore-Gibson-Thompson model due to a moving heat source
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DOI：10.1016/j.icheatmasstransfer.2026.111371.png)
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Abstract
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This work explores the dynamic response of a microelongated thermoelastic rod subjected to a moving thermal load within the framework of the Moore–Gibson–Thompson (MGT) theory, which incorporates thermal relaxation effects. The governing field equations are formulated and solved using the Laplace transform technique, and the inverse solutions are obtained numerically through the Riemann–sum approximation. Computational results are carried out with MATLAB to analyze the influence of the moving heat source velocity relative to the longitudinal wave speed. The outcomes are illustrated graphically, highlighting how variations in the source velocity, whether subsonic, sonic, or supersonic, affect the distribution of displacement, microelongation, temperature, and stress. The findings emphasize the sensitivity of thermoelastic responses to thermal load velocities and demonstrate the suitability of the MGT framework for capturing microstructural and relaxation effects in microelongated materials.
Keywords:
Microelongated rod
Moore–Gibson–Thompson theory
Moving heat source
Thermoelasticity
Thermal relaxation
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6.4
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2.5W
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