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基于圆筒模型的热障涂层安定分析

徐颖强 孙戬 李万钟 张一弛 陈亚亚

徐颖强, 孙戬, 李万钟, 张一弛, 陈亚亚. 基于圆筒模型的热障涂层安定分析[J]. 力学学报, 2015, 47(5): 779-788. doi: 10.6052/0459-1879-15-073
引用本文: 徐颖强, 孙戬, 李万钟, 张一弛, 陈亚亚. 基于圆筒模型的热障涂层安定分析[J]. 力学学报, 2015, 47(5): 779-788. doi: 10.6052/0459-1879-15-073
Xu Yingqiang, Sun Jian, Li Wanzhong, Zhang Yichi, Chen Yaya. SHAKEDOWN ANALYSIS OF THERMAL BARRIER COATINGS BASED ON CYLINDER MODEL[J]. Chinese Journal of Theoretical and Applied Mechanics, 2015, 47(5): 779-788. doi: 10.6052/0459-1879-15-073
Citation: Xu Yingqiang, Sun Jian, Li Wanzhong, Zhang Yichi, Chen Yaya. SHAKEDOWN ANALYSIS OF THERMAL BARRIER COATINGS BASED ON CYLINDER MODEL[J]. Chinese Journal of Theoretical and Applied Mechanics, 2015, 47(5): 779-788. doi: 10.6052/0459-1879-15-073

基于圆筒模型的热障涂层安定分析

doi: 10.6052/0459-1879-15-073
基金项目: 国家自然科学基金(11072196,5875214,10672134)和陕西省自然科学基金(2015JM1009)资助项目.
详细信息
    通讯作者:

    徐颖强,教授,主要研究方向:热障涂层稳定性,结构疲劳强度与可靠性等.E-mail:xuyngqng@nwpu.edu.cn

  • 中图分类号: TG174.4;O341;O346

SHAKEDOWN ANALYSIS OF THERMAL BARRIER COATINGS BASED ON CYLINDER MODEL

Funds: The project was supported by the National Natural Science Foundation of China (11072196,5875214,10672134) and the Natural Science Basic Research Plan in Shaanxi Province of China (2015JM1009).
  • 摘要: 热载荷作用下,由于热障涂层(thermal barrier coatings, TBCs) 各层材料的热不匹配以及材料参数的温度相关等因素,会使热障涂层界面区域存在复杂的应力应变场,影响系统安定性,并导致涂层开裂和剥落. 将热障涂层外凸和内凹微观界面结构简化为多层圆筒模型,借助经典机动安定定理,利用特雷斯卡(Tresca) 屈服准则和增量破坏准则处理对时间的积分问题,避免了常规安定性分析的数学规划问题,建立了热障涂层安定极限分析方法,将材料屈服强度随温度变化关系简化为双线性关系,利用补偿变换的方法简化求解过程,对典型热障涂层安定性进行了研究. 结果表明,利用基于圆筒的安定极限分析方法,能够方便求解安定极限,便于工程应用;热障涂层安定极限值明显高于弹性设计值,且界面外凸区域安定极限高于内凹区域极限值,结构首先在内凹处失效;圆筒模型基体曲率和涂层厚度越大,结构安定极限越高,分析结果与试验结果一致;所建立的热障涂层安定分析方法,对进一步研究考虑蠕变因素影响的热障涂层安定性具有重要意义.

     

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出版历程
  • 收稿日期:  2015-03-05
  • 修回日期:  2015-07-23
  • 刊出日期:  2015-09-18

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