Convective Heat Transfer Steady Thermal Stress in a ZrO2/FGM/Ti-6Al-4V Composite ECBF Plate with Temperature-Dependent Material Properties
A NFE model is constructed to analyze the convective heat transfer steady thermal stress in a ZrO2/FGM/Ti-6Al-4V composite ECBF plate with temperature-dependent material properties. From numerical calculation, when , T0=300K, Ta=550K and Tb=1800K, the stress distributions in the plate were obtained. The results are as follows. With the increase of the FGM gradient layer thickness, the stress distribution in the composite plate is more reasonable. With the increase of M, the thermal stress change increases obviously in metal and ceramic layers, and the stress on the ceramic surface reduces. With the increase of porosity, the change of stress at the bonding interfaces increases, and the tensile stress on the surface of ceramics reaches the maximum. Compared with , when , the stress on the metal surface reduces by 25.1%, and the maximum compressive stress on the surface of ceramics increases about 1.2GPa. Compared with the nongraded two-layered ceramic/metal composite plate, the thermal stress of ZrO2/FGM/Ti-6Al -4V composite ECBF plate is very gentle. When we consider the temperature dependency of the material properties, the thermal stress in graded three-layered composite plate becomes small obviously. The results provide the foundations of theoretical calculation for the design and application of the composite plate.
Wei Pan and Jianghong Gong
Y. J. Xu et al., "Convective Heat Transfer Steady Thermal Stress in a ZrO2/FGM/Ti-6Al-4V Composite ECBF Plate with Temperature-Dependent Material Properties", Key Engineering Materials, Vols. 434-435, pp. 158-161, 2010