论文部分内容阅读
This paper studies numerically the thermo-mechanical effects of ZrO2 thermal barrier coatings (TBCs) irradiated by a high-intensity pulsed ion beam in consideration of the surface structure.Taking the deposited energy of ion beams in TBCs as the source term in the thermal conduction equation,the distribution of temperature in TBCs was simulated.Then,based on the distribution,the evolution of thermal stress was calculated by the finite element method.The results show that tensile radial stress formed at the valley of TBC surfaces after irradiation by HIPIB.Therefore,if cracks happen,they must be at valleys instead of peaks.As for the stress waves,no matter whether through peak or valley position,tensile and compressive stresses are present alternately inside TBCs along the depth direction,and the strength of stress decreases with time.
This paper studies numerically the thermo-mechanical effects of ZrO2 thermal barrier coatings (TBCs) irradiated by a high-intensity pulsed ion beam in consideration of the surface structure. Taking the deposited energy of beams in TBCs as the source term in the thermal conduction equation, the distribution of temperature in TBCs was simulated. Chen, based on the distribution. the evolution of thermal stress was calculated by the finite element method. results show that tensile radial stress formed in the valley of TBC surfaces after irradiation by HIPIB. Therefore, if cracks happen, they must be at valleys instead of peaks.As for the stress waves, no matter whether through peak or valley position, tensile and compressive stresses are along alternate direction with time.