Convective Heat Transfer Steady Thermal Stress and Effect Factors in a ZrO2/FGM/Ti-6Al-4V Composite EFBF Plate

A finite element model is constructed to analyze the steady thermal stress and effect factors in a ZrO₂/FGM/Ti-6Al-4V composite EFBF plate under convective heat transfer boundary. From numerical calculation, when hmacr_a=hmacr_b=1, T₀=T_a =300 K and T_b=1 800 K, the stress distributions in the plate were obtained. The numerical results show that compared with h₂= 2 mm the tensile stress of h₂=6 mm reduces by 36.3%. With the increase of M, the stress on the metal surface reduces, and the stress on the ceramic surface increases. With the increase of porosity, the change of stress at the interface of the three-layered plate increases, and the tensile stress on the surface of ceramics reaches the maximum. Compared with hmacr_a=hmacr_b=1 when hmacr_a=hmacr_b=10, the stress on the metal surface increases by 148%, and the stress on the ceramic surface increases by 165%. Compared with the nongraded two-layered ceramic/metal composite plate, the thermal stress of ZrO₂/FGM/Ti-6Al-4V composite EFBF plate is very gentle. The results provide the foundations of theoretical calculation for the design and application of the composite plate.