Study on Heating Steady Temperature Field in a ZrO<sub>2</sub>/FGM/Ti-6Al-4V Composite Plate Considered Temperature Dependency Based on NFEM

Abstract

The steady temperature distributions in a ceramic / metal composite FGM plate with temperature-dependent material properties during heating process were investigated by the NFEM. From numerical calculation, when T0=300K, Ta=650K and Tb=1 700K, the temperature distributions in the composite FGM plate were obtained. The results are as follows. With the increase of the FGM gradient layer thickness and when M=1, the temperature distributions in the composite plate are more reasonable. With the increase of porosity, the variations of the temperature curve become big obviously, and there is an abrupt change for the temperature at =0.5, its value is about 917K, but the temperature curve is gentle and smooth at the bonding interfaces of the three-layered composite FGM plate. Compared with the nongraded two-layered ceramic/metal composite plate, the temperature of the ZrO2/FGM/Ti-6Al-4V composite plate is very gentle. When the temperature dependency of the material properties was considered, the temperature in graded three-layered composite FGM plate becomes small obviously. The results provide the foundations of theoretical calculation and the further analysis of thermal stress for the design and application of the composite plate.