IMECH-IR  > 先进制造工艺力学重点实验室
Understanding the enhancement of coating's thermal cracking resistance by multiple segmentation
Chen XJ(陈学军); Chen GN(陈光南); Chen XJ(陈学军)
Source PublicationADVANCED MANUFACTURING TECHNOLOGY
2011
Pages223-230
Conference Name2011 International Conference on Advanced Design and Manufacturing Engineering, ADME 2011
Conference DateSEP 16-18, 2011
Conference PlaceGuangzhou, China
AbstractIn this paper, the thermal shock induced cracking behavior of a segmented coating on the outer surface of a hollow cylinder has been investigated. The driving force for the propagation of multiple segmentation crack, represented by the Thermal Stress Intensity Factor (TSIF), was determined by combination of the principle of superposition and the finite element method. The maximum TSIF has been shown to occur neither at the beginning nor at the steady state of thermal transients, but at an intermediate instant. As the spacing between multiple segmentation cracks decreases, the magnitude of TSIF first plateaus, and then decreases sharply. This quantitative mechanistic result rationalizes the experimental observations that a segmented coating can exhibit much higher thermal shock resistance than an intact counterpart, if only the segmentation crack spacing is narrow enough. Some other parameters affecting TSIF, such as segmentation crack depth and convection severity, were also discussed.
KeywordCoatings Crack Initiation Cracking (Chemical) Cracks Design Finite Element Method Stress Intensity Factors Thermal Shock Thermal Stress Cracking Behavior Driving Forces Experimental Observation Hollow Cylinders Multiple Segmentation Outer Surface Principle Of Superposition Segmentation Crack Segmentation Cracks Segmented Coatings Steady State Thermal Cracking Thermal Shock Resistance Thermal Transients
WOS IDWOS:000303483500044
DepartmentMAM表面与界面改性
ISBN978-3-03785-215-6
URL查看原文
Indexed ByCPCI-S ; EI
Language英语
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Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/46839
Collection先进制造工艺力学重点实验室
Corresponding AuthorChen XJ(陈学军)
Recommended Citation
GB/T 7714
Chen XJ,Chen GN,Chen XJ. Understanding the enhancement of coating's thermal cracking resistance by multiple segmentation[C]ADVANCED MANUFACTURING TECHNOLOGY,2011:223-230.
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