Strain field evolution of 2D needled C/SiC composites under tension

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• 作者：Guoqiang Yu^a ; ^b ; Xiguang Gao^a ; ^b ; ^{gaoxiguang@nuaa.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Guangwu Fang^a ; ^b ; Jiangang Xue^a ; ^b ; Yingdong Song^a ; ^b ; ^c
• 关键词：Ceramic matrix composite ; Digital image correlation ; Strain field ; Non-linearity
• 刊名：Journal of the European Ceramic Society
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：37
• 期：2
• 页码：531-537
• 全文大小：3186 K

文摘

In this study, the digital image correlation (DIC) technique was applied to the tensile test of 2D needled C/SiC composites as a full-field measuring tool with the purpose of characterizing the tensile behavior of the material. The non-linear macroscopic tensile stress-strain curve was obtained. The relationship between the local non-linearity and the macroscopic non-linearity was investigated. The spot- and band-type strain field distributions were observed, and the evolution of the non-uniform strain field distribution was studied. The correlation between the strain field distribution and the structure of the needled preform of the material was also discussed.