中国机械工程 ›› 2010, Vol. 21 ›› Issue (19): 2375-2378.

• 材料工程 • 上一篇    下一篇

热障涂层粗糙表面弹塑性接触应力分析

林富华;徐颖强;靳少杰
  

  1. 西北工业大学,西安,710072
  • 出版日期:2010-10-10 发布日期:2010-10-20
  • 基金资助:
    国家自然科学基金资助项目(10672134,50875214);研究生种子创新基金资助项目(Z200928)
    National Natural Science Foundation of China(No. 10672134,50875214)

Contact Stress Analysis of Thermal Barrier Coatings and Multi-asperity Surface

Lin Fuhua;Xu Yingqiang;Jin Shaojie
  

  1. Northwestern Polytechnical University,Xi’an,710072
  • Online:2010-10-10 Published:2010-10-20
  • Supported by:
    National Natural Science Foundation of China(No. 10672134,50875214)

摘要:

含热障涂层的发动机零部件能有效提高抗热性能,但微接触作用下的部件涂层表面的应力分布规律及失效形式直接影响发动机可靠性。以热障涂层与榫头接触作用为背景,将其抽象为含规则粗糙峰的刚性表面与热障涂层微接触模式,利用弹塑性接触有限元方法分析涂层表面下的压力及应力分布,研究压入深度、涂层厚度、弹性模量和屈服强度对于涂层压力及残余应力分布的影响。

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Abstract:

A engine part with TBC can in effect improve anti-hot capability,but the distribution of stress of coating in contact with multi-asperity and collapse have 
not been mastered.According to TBC contacted by the rabbet of the aircraft engine blade,a rigid multi-asperity surface was abstracted as micro-contact pattern and the contact pressure and stress in the subsurface was analyzed with the elastic-plastic finite element method.The effect of coating thickness,elastic moduli,yield strength on the distribution of residual stress for the TBC was investigated.

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