...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Surface & Coatings Technology >Finite element simulation of residual stress and failure mechanism in plasma sprayed thermal barrier coatings using actual microstructure as the representative volume
【24h】

Finite element simulation of residual stress and failure mechanism in plasma sprayed thermal barrier coatings using actual microstructure as the representative volume

机译：以实际的微观结构为代表的有限元模拟等离子喷涂热障涂层的残余应力和破坏机理

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

The residual stress and failure mode of thermal barrier coating (TBC) containing metallic bond coat (BC) and ceramic top coat (TC) with and without thermally grown oxide (TGO) were predicted using a micromechanicalbased finite element method (FEM). Actual microstructures of the TBC taken by a scanning electron microscope (SEM) were utilized as the representative volume elements (RVE5) in the computational model. Failure mode of the representative volume was numerically simulated as thermal stress localization during thermal cycle. Computations were done on the representative volume to quantitatively assess the effects of thermal and mechanical properties of the TBC constituents as well as the presence of TGO on the macroscopic mechanical response of the TBC. Comparisons of computed results with experiments verified that, the computational method can successfully predict residual stress and crack initiation mode of the studied thermal barrier coatings. Moreover, based on the computed results, both shear and normal failure mode occur in the thermal barrier coating which is in good agreement with experimental findings. (C) 2016 Elsevier B.V. All rights reserved.
机译：使用基于微机械的有限元方法（FEM）预测了包含金属粘结层（BC）和带有和不带有热生长氧化物（TGO）的陶瓷面漆（TC）的隔热涂层（TBC）的残余应力和破坏模式。通过扫描电子显微镜（SEM）拍摄的TBC的实际微观结构被用作计算模型中的代表体积元素（RVE5）。在热循环过程中，将代表体积的破坏模式数值模拟为热应力局部化。对代表性体积进行计算，以定量评估TBC组分的热和机械性能以及TGO的存在对TBC宏观机械响应的影响。计算结果与实验结果的比较表明，该计算方法可以成功预测所研究隔热涂层的残余应力和裂纹萌生方式。此外，基于计算结果，在隔热涂层中同时发生剪切和正常破坏模式，这与实验结果非常吻合。 （C）2016 Elsevier B.V.保留所有权利。

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