| 热循环条件下圆柱结构热障涂层系统应力场演变分析 |
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| 引用本文： | 苏鹏.热循环条件下圆柱结构热障涂层系统应力场演变分析[J].湘潭大学自然科学学报,2011,33(3):47-54. |
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| 作者姓名： | 苏鹏 |
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| 作者单位： | 湘潭大学材料与光电物理学院;湘潭大学低维材料及其应用技术教育部重点实验室;南昌航空大学航空检测与评价航空科技重点实验室; |
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| 基金项目： | 教育部新教师基金项目，中国航空科技航空检测与评价技术重点实验室开放课题 |
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| 摘 要： | 基于弹性热力学，建立了一个四层空心圆柱结构热障涂层系统的应力模型和解析解.在考虑了弹塑性变形和蠕变变形影响的条件下，分析了热循环次数、基底曲率半径和热循环温度对TBCs系统残余应力的影响.随着热循环次数的增加，TBCs系统内不匹配残余应力的差异不断加剧.氧化层内环向应力和轴向应力数值大约为-2.2 GPa，是其他三层相应应力的10倍，具有明显的应力奇异性.该特性必然加剧TBCs的界面裂纹扩展和涂层剥落.基底曲率半径越小，陶瓷表面服役温度越高，越容易造成TBCs系统内应力分布不均匀.
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| 关 键 词： | 热障涂层 残余应力 热循环 圆柱体结构 |
Stress Evolution of Thermal Barrier Coating with Cylindrical Geometry Structure under Thermal Cycling |
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| SU Peng,JIANG Jun-ping,MAO Wei-guo.Stress Evolution of Thermal Barrier Coating with Cylindrical Geometry Structure under Thermal Cycling[J].Natural Science Journal of Xiangtan University,2011,33(3):47-54. |
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| Authors: | SU Peng JIANG Jun-ping MAO Wei-guo |
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| Institution: | SU Peng1,3,JIANG Jun-ping1,MAO Wei-guo1,2,3(1.Faculty of Materials,Optoelectronics and Physics,Xiangtan University Xiangtan 411105,2.Aeronautical Science and Technology Key Laboratory of Aeronautical Test and Evaluation,Nanchang Hangkong University,Nanchang 330063,3.Key Laboratory of Low Dimensional Materials & Application Technology,Ministry of Education,Xiangtan University,Xiang tan 411105 China) |
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| Abstract: | An analytical solution of a hollow cylindrical structure of four-layer thermal barrier coatings(TBCs) system model was deduced by thermo-elastic mechanics.The effects of thermal cycling,substrate curvature radii and working temperature on the stress distributions of TBCs system were analyzed and discussed under elastic-plastic deformation and high-temperature creep.With the increase of thermal cycles,thermal/residual stresses in TBCs were aggravated.The results indicate that the magnitude of hoop and axial ... |
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| Keywords: | thermal barrier coating residual stress thermal cycling cylindrical structure |
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