Experimental Studies on the Elastic Properties of Carbon Fiber Reinforced Polymer Composites Prefabricated of Unidirectional Carbon Fiber Fabrics and a Modified Rule of Mixtures in the Parallel Direction

Advanced Composites Letters

Article

Huasheng Sun¹  Ying Luo²  Wenbin Sun³ 

[1] Faculty of Architecture and Civil Engineering, Huaiyin Institute of Technology, 89 Beijing Beilu, Huai'an, Jiangsu 223001, China;Faculty of Civil Engineering and Mechanics, Jiangsu University, 301 Xuefu Lu, Zhenjiang, Jiangsu 212013, China;Faculty of Civil Engineering and Mechanics, Jiangsu University, 301 Xuefu Lu, Zhenjiang, Jiangsu 212013, China;Faculty of Architecture and Civil Engineering, Huaiyin Institute of Technology, 89 Beijing Beilu, Huai'an, Jiangsu 223001, China;

关键词: undirectional CF fabric;    CFRP composite;    mechanical property;    modified rule of mixtures;   

DOI  :  10.1177/096369351802700104

 received in 2017-11-27, accepted in 2018-02-22,  发布年份 2018

来源: Sage Journals

【 摘 要 】

Carbon fiber (CF) fabrics can be installed manually onto the surfaces of existing structural members to establish a carbon fiber reinforced polymer (CFRP) reinforcemenet system, even in areas of limited access. Actual mechanical properties, such as the ultimate tensile strength (UTS), elastic modulus (EM), and ultimate rupture strain (URS), are essential for application in engineering practice and theoretical analysis of CFRP strengthening system. In this study, 16 CFRP strips were prefabricated of unidirectional CF sheet by a wet lay-up technique, and were tested to evaluate their elastic parameters. Test results indicated that experimental values of all specimens were much lower than that of CF fabrics, which were provided by manufacturer, and the stress-strain curves were observed to deviate slightly from a perfectly linear relationship at the later stage of loading. Comparing with the predictions of the rule of mixtures (ROM), the experimental data have large deviations and opposite laws. An orientated-design model was derived to modify the linear ROM by the regression analysis. A modified rule of mixtures (MROM) was suggested to describe the elastic properties of CFRP composite in the parallel direction.

【 授权许可】

Unknown   
© 2018 SAGE Publications Ltd

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