Delamination failure in ceramic matrix composites: Numerical predictions and experiments

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• 作者：Rajesh S. Kumar ; ^{kumarRS@utrc.utc.com} ; Gregory S. Welsh¹
• 关键词：Ceramic matrix composites (CMCs) ; Delamination ; Cohesive-zone model ; Finite element analysis (FEA) ; Strain visualization
• 刊名：Acta Materialia
• 出版年：2012
• 期刊代码：1_13596454
• 类别：ms
• 出版时间：April, 2012
• 卷：60
• 期：6-7
• 页码：2886-2900
• 文件大小：2098 K

摘要

The cohesive-zone finite element approach is used to predict initiation and propagation of delamination in relatively complex ceramic matrix composite sub-elements. Two different generic attachment sub-elements are analyzed and tested under applied uniaxial load. Pre-test analyses predict that delamination initiation and growth are the predominant failure mechanism for both of the sub-elements. Experimental results confirm the finite element predictions, and a good qualitative and quantitative agreement is found between the two.