Effect of fiber reinforcement on the tensile, fracture and thermal properties of syntactic foam

被引:76
作者
Wouterson, Erwin M.
Boey, Freddy Y. C.
Hu, Xiao
Wong, Shing-Chung [1 ]
机构
[1] Univ Akron, Dept Mech Engn, Akron, OH 44325 USA
[2] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore
关键词
syntactic foam; fiber reinforced polymers; toughness;
D O I
10.1016/j.polymer.2007.03.069
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
This paper examines the effect of the fiber content and fiber length on tensile, fracture and thermal properties of syntactic foam. Results showed that a hybrid structure demonstrates a significant increase in the ultimate tensile strength, sigma(uts), and Young's modulus, E, with increasing fiber loading. Interestingly, the fracture toughness, K-Ic., and energy release rate, G(Ic), increased by 95% and 90%, respectively, upon introduction of 3 wt% short carbon fibers in syntactic foam, indicating the potent toughening potential for short carbon fibers in syntactic foam systems. SEM and OM studies identified the presence of several toughening mechanisms. An estimate of the contribution from each toughening mechanism by composite theory and fractography revealed that the specific energy required to create new surfaces was enhanced by the presence of fibers and was the main contributor to the toughness of the short fiber reinforced syntactic foam. (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码:3183 / 3191
页数:9
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