| 摘要: |
| 对装机使用后的热障涂层叶片进行观察，发现电子束物理气相沉积涂层和等离子喷涂涂层表面均出现皱曲，不同于通常意义上的陶瓷层/粘接层界面皱曲。为了解释这种皱曲伴生的涂层断裂以及与皱曲特征参数的关系，利用ANSYS进行了数值模拟，表明皱曲波长对涂层断裂位置产生影响。短波长时面层凹陷处等效应力更大，属危险点。长波长时面层凸起处应力更大，在面层/底层界面处属危险点。 |
| 关键词: 热障涂层 皱曲 数值模拟 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金重点项目（50531060）和面上项目（50471087） |
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| Numerical Simulation on Wrinkling Phenomenon of Thermal Barrier Coatings |
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HE Ling–rong, ZHANG Kun, CHEN Guang–nan1,2
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1. MAM, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190;2. Graduate University of Chinese Academy of Sciences, Beijing 100190
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| Abstract: |
| Two types of thermal barrier coatings prepared by EB–PVD and PS respectively present surface wrinkling after service. This characteristic is different from that of conventional interface rumpling in that both top coat and bond coat develop undulation. In order to explain the behavior of TC fracture, a new wrinkling mode is established and analyzed through numerical simulation. It is believed that undulation wavelength affect the stress field and fracture location of TC. |
| Key words: thermal barrier coatings wrinkling numerical simulation |
