Study of temperature conduction processes in sandwich structures

Abstract

Abstract The sandwich structure is a common protective design that has been extensively used in the field of protection, but few studies have been done on its multilayer temperature conduction characteristics. Based on one typical sandwich protective structure, a temperature conduction model is established. The IMEX method is used to solve the established model, and then the attenuation rate of the temperature field with changes in the protective structure’s dimensions is theoretically calculated. Simultaneously, a simulation experimental platform is set up, and temperature conduction experiments are conducted. The results show that the theoretical model could describe the temperature conduction process of the sandwich structure, and the experimental results are in good agreement with the theoretical calculations; when the structural parameters are fixed, the temperature of each layer of the material increased gradually with time and finally tended to be stabilized. The rate of change of temperature is the largest in 0 s ~ 200 s; when the parameters are fixed in time, the temperature decreases gradually with the change of spatial position and finally tends to be stabilized. The thermal conduction rate of each layer of the material determines its change. The temperature change rate of the heat insulation layer and air layer is relatively high. The research can provide support and reference for the design of sandwich temperature protection structures.