A study of the mechanical behaviour on fibre reinforced hollow microspheres hybrid composites

被引:63
作者
Ferreira, J. A. M. [1 ]
Capela, C. [2 ]
Costa, J. D. [1 ]
机构
[1] Univ Coimbra, Dept Mech Engn, CEMUC, P-3030788 Coimbra, Portugal
[2] Polytech Inst Leiria, Dept Mech Engn, CDRsp, P-2400901 Leiria, Portugal
关键词
Hybrid; Foams; Fracture toughness; Mechanical properties; SYNTACTIC FOAM; FRACTURE-TOUGHNESS; FAILURE MECHANISMS; MODIFIED EPOXIES; COMPRESSION; FEATURES;
D O I
10.1016/j.compositesa.2009.10.018
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This paper presents the results of an investigation into the effects of hollow glass microsphere fillers and of the addition of short fibre reinforcements on the mechanical behaviour of epoxy binding matrix composites. Properties like flexural stiffness, compressive strength, fracture toughness and absorbed impact energy, were studied. The specimens were cut from plates produced by vacuum resin transfer moulding having a microsphere contents of up to 50% and with fibre reinforcement up to 1.2% by volume. The tests performed with unreinforced composites show that flexural and compressive stiffness, maximum compressive stresses, fracture toughness and impact absorbed energy decrease significantly with increasing filler content. However, in terms of specific values, both flexural and compressive stiffness and impact absorbed energy increase with microsphere content. The addition of glass fibre produces only a slight improvement in the flexure stiffness and fracture toughness, while increasing significantly the absorbed impact energy. In contrast, the addition of a small percentage of carbon fibres produces an important improvement in both fracture toughness and flexure stiffness, when hybrid composites with 0.9% carbon fibre are compared to unreinforced foam, but did not improved absorbed impact energy. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码:345 / 352
页数:8
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