Transient responses of bi-layered structure based on generalized thermoelasticity: Interfacial conditions

• Thermal contact resistance and elastic wave impendence are considered.
• A semi-analytical solution is obtained by using the Laplace transform method.
• The effects of interfacial conditions on the thermoelastic responses are evaluated.

Multi-layered structures are always designed to apply in the harsh environment, e.g. high temperatures and impact loads, etc. In this work, thermoelastic analysis of a bi-layered structure is implemented in the context of generalized thermoelasticity, e.g. GL model. To distinguish from existed works, the thermal contact resistance and the elastic wave impendence at the interface are considered. Accordingly, they may degenerate into the continuous conditions by selecting ideal parameters. In the numerical part, a semi-analytical solution is obtained by using the Laplace transform method, upon which the effects of the thermal contact resistance, elastic wave impendence ratio, thermal conductivity ratio and heat capacity ratio on the responses are studied. And finally, some concluding remarks are summarized, based upon which the structure may be optimized by adopting suitable material ratio in both thermal and elastic sense.