Photothermal–mechanical interaction in poroelastic semiconductors with microtemperature effects

Abstract This study examined a two-dimensional deformation due to photo-thermo-hydro-mechanical issues related to the poroelastic semiconductor material in a generalized photo-thermoelasticity theory that includes microtemperature effects and varying material properties. A new theoretical model is proposed that integrates photo-thermo-hydro-mechanical interactions under the framework of generalized thermoelasticity. Unlike the previous studies, this work explicitly includes microtemperature-dependent heat flux and porosity-driven fluid interactions, which are critical for accurately modeling energy transport in semiconductor materials. The foundation material was envisioned as a uniform, completely saturated, poroelastic semiconductor medium, and a mechanical force was applied at the free surface of the thermoelastic half-space. The novelty of this work lies in formulating a new coupled dynamic model that integrates photothermal, hydraulic, and mechanical stresses with microtemperature interactions in a poroelastic semiconductor medium. Initially, we employed the normal modes technique to find the exact solution of the non-dimensional coupled equations. Subsequently, we examined the impact of temperature distribution, carrier density, excess pore water pressure, displacement, microtemperature, mechanical normal and shear stresses, and heat flux moment tensor for photo-thermo-hydro-mechanical dynamic models with microtemperatures. The findings offer valuable insights for applications in geophysics, nuclear waste management, and biomedical engineering, where multi-physics interfaces are significant, and the computed results are presented graphically for deeper interpretation.