Reflection at the free surface of the orthotropic piezo-hygro-thermo-elastic medium.

Purpose: This paper aims to study the impact of pyro-electricity, moisture and temperature diffusivity on the energy distribution of plane waves at the free surface of an orthotropic piezo-hygro-thermo-elastic medium. Design/methodology/approach: This study presents the novel creation of governing equations for an anisotropic piezothermoelastic medium with moisture impact, which is a significant contribution of this paper. Findings: In addition to providing numerical data for the amplitude ratios and energy ratios of reflected waves, this study identifies five different kinds of coupled reflected plane waves, namely, quasi-longitudinal P wave, quasi-thermal wave, quasi-transverse wave, quasi-moisture wave and electric potential wave. Research limitations/implications: The graphical analysis examines the impact of various factors, such as the angle of incidence, moisture and temperature diffusivity, pyro-electricity and frequency, on energy distribution. Practical implications: This paper's results significantly impact the development of more efficient piezoelectric materials and their applications in geophysics. Originality/value: The authors of the submitted document initiated and produced it collectively, with equal contributions from all members. [ABSTRACT FROM AUTHOR]