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Volume 35 Issue 2
Feb.  2009
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Journal of Beijing University of Aeronautics and Astronautics  > 2009  >  35(2): 174-178.
Guo Xingwang, Ding Mengmeng. Modeling and finite element analysis of thermal barrier coatings in IR NDT[J]. Journal of Beijing University of Aeronautics and Astronautics, 2009, 35(2): 174-178. (in Chinese)
Citation: Guo Xingwang, Ding Mengmeng. Modeling and finite element analysis of thermal barrier coatings in IR NDT[J]. Journal of Beijing University of Aeronautics and Astronautics, 2009, 35(2): 174-178. (in Chinese)
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Modeling and finite element analysis of thermal barrier coatings in IR NDT

  • School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 20 Jul 2008
  • Publish Date: 28 Feb 2009
    Abstract
  • The transient heat conduction of TBC(thermal barrier coatings) structures in TNDT(thermal non-destructive testings) was described by an axisymmetrical model in a cylindrical coordinate, and the corresponding physical model was constructed. The temperature field of TBC structures stimulated by a heating pulse was analyzed by using the FEA(finite element analysis) software ANSYS, and the relations between information parameters(such as maximum differential temperature and maximum contrast) and defect parameters(such as defect radius, depth, coating thickness and thickness difference) were studied. The results show that, at a fixed coating thickness, the maximum differential temperature and maximum contrast are a nonlinear function of the defect radius respectively and increase with the defect radius, and their saturation value exist. At a fixed defect radius, the maximum differential temperature and maximum contrast are a nonlinear function of the coating thickness respectively, and decrease when the coating thickness increasing. These results provide a theoretical support for the detection and characterization of delamination in TBC structures by infrared thermography.

     

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  • [1] Bision P G,Marinetti S,Grinzato E, et al. Inspecting thermal barrier coatings by IR thermography Cramer K, Maldague X. Proc SPIE Thermosense XXV. Orlando: SPIE, 2003:318-327 [2] Shepard Steven M, Hou Yulin,Lhota James R, et al. Thermographic measurement of thermal barrier coating thickness Peacock G, Burleigh D, Miles J, et al. Proc SPIE Thermosense XXVII. Orlando: SPIE,2005:407-410 [3] 孔祥谦. 有限单元法在传热学中的应用[M]. 第3版. 北京:科学出版社, 1986:169-180 Kong Xiangqian. Application of finite element method in heat transfer [M]. 3rd ed. Beijing: Science Press, 1986:169-180 (in Chinese) [4] Saeed Moaveni. 有限元分析:ANSYS理论与应用[M]. 第2版.北京: 电子工业出版社, 2008:322-324 Saeed Moaveni. Finite element analysis: theory and application with ANSYS [M]. 2nd ed. Beijing: Publishing House of Electronics Industry, 2008:322-324(in Chinese) [5] 《中国航空材料手册》编辑委员会. 中国航空材料手册[M]. 北京: 中国标准出版社, 2001:9-300 China Aeronautical Materials Handbook Redaction Committee. China aeronautical materials handbook [M]. Beijing: Standard Press of China, 2001:9-300(in Chinese) [6] 杨世铭,陶文铨. 传热学[M]. 第3版. 北京:高等教育出版社, 2004:20-25 Yang Shiming, Tao Wenquan. Heat transfer [M]. 3rd ed. Beijing: Higher Education Press, 2004:20-25(in Chinese)
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