• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Strain Analysis for Engineering Design >Simulation of failure of air plasma sprayed thermal barrier coating due to interfacial and bulk cracks using surface-based cohesive interaction and extended finite element method
【24h】

Simulation of failure of air plasma sprayed thermal barrier coating due to interfacial and bulk cracks using surface-based cohesive interaction and extended finite element method

机译：使用基于表面的内聚相互作用和扩展有限元方法模拟空气等离子喷涂热障涂层由于界面和整体裂纹而导致的失效

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This article describes a method of predicting the failure of a thermal barrier coating system due to interfacial cracks and cracks within bulk coatings. The interfacial crack is modelled by applying cohesive interfaces where the thermally grown oxide is bonded to the ceramic thermal barrier coating. Initiation and propagation of arbitrary cracks within coatings are modelled using the extended finite element method. Two sets of parametric studies were carried out, concentrating on the effect of thickness of the oxide layer and that of initial cracks within the ceramic coating on the growth of coating cracks and the subsequent failures. These studies have shown that a thicker oxide layer creates higher tensile residual stresses during cooling from high temperature, leading to longer coating cracks. Initial cracks parallel to the oxide interface accelerate coating spallation, and simulation of this process is presented in this article. By contrast, segmented cracks prevent growth of parallel cracks which can lead to spallation.
机译：本文介绍了一种预测由于界面裂纹和整体涂层内部裂纹而导致的热障涂层系统故障的方法。界面裂纹是通过在热生长的氧化物粘结到陶瓷隔热层上施加粘结界面来建模的。使用扩展有限元方法对涂层内任意裂纹的萌生和扩展进行建模。进行了两组参数研究，重点研究了氧化层厚度和陶瓷涂层内初始裂纹对涂层裂纹扩展及随后失效的影响。这些研究表明，较厚的氧化物层在从高温冷却期间会产生较高的拉伸残余应力，从而导致更长的涂层裂纹。平行于氧化物界面的初始裂纹会加速涂层剥落，本文将对此过程进行仿真。相比之下，分段裂纹会阻止平行裂纹的扩展，从而导致散裂。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号