Analysis of Stress Intensity Factor of Interfacial Crack in TBC
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摘要: 主要探讨了应用局部配置法求解拉伸载荷下和热载荷下陶瓷隔热涂层界面裂纹的应力强度因子的方法.对于陶瓷隔热涂层,其陶瓷层与粘结层之间的界面裂纹的应力强度因子是复型的,它包括应力强度因子的模和相位角.其求解与传统均质材料的应力强度因子是不同的.Abstract: The local collocation technique was used to evaluate the stress intensity factor of the interfacial crack. Combined with finite element method, it is used to compute the stress intensity factor of the interfacial crack between the ceramic coating and bond coating of thermal barrier coating under tensile load and thermal load. The stress intensity factor of the interfacial crack is complex, it includes the magnitude and phase angle, so the method to determine the K factor is different from traditional methods that are used to determine the K factors of homogeneous material. Finally, the results are discussed.
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Key words:
- coats /
- finite elements /
- cracks /
- stress intensity factor
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[1] Williams M L. The stresses around a fault or crack in dissimilar media[J]. Bulletin of the Seismological Society of America, 1959,49(2):199~204. [2]Takeuchi Y R,Kokini K. Thermal fracture of multilayer ceramic thermal barrier coatings[J]. J Engineering Gas Turbines Power Transactions of the ASME,1994,116:266~271. [3]Oneil David A, Wayne Steven F. Numerical simulation of fracture in coated brittle materials subjected to tribo-contact[J]. J Engineering Materials and Technology, 1994,116:471~478. [4]Dattaguru B,Venkatesha K S,Ramamurthy T S,et al. Finite element estimates of strain energy release rate components at the tip of an interface crack under mode I loading[J]. Engineering Fracture Mechanics, 1994,49(3):451~463. [5]Rice J R. Elastic fracture mechanics concepts for interfacial cracks. ASME Journal of Applied Mechanics, 1988,55(1):98~103. [6]耿 瑞. 陶瓷隔热陶瓷应用研究. 北京:北京航空航天大学动力系,1996. [7]冯 康. 数值计算方法[M]. 北京:国防工业出版社,1978. -
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