The Tensile Fatigue Behavior of a Glass-fiber Reinforced Plastic Composite Using a Hybrid-toughened Epoxy Matrix
The Tensile Fatigue Behavior of a Glass-fiber Reinforced Plastic Composite Using a Hybrid-toughened Epoxy Matrix
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DOI：
10.1177/0021998309360943
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发表时间：
2010-08-01
影响因子：
2.9
通讯作者：
Kinloch, A. J.
中科院分区：
文献类型：
--
作者：
Manjunatha, C. M.;Sprenger, S.;Kinloch, A. J.
通过掺入9wt%的羧基封端的丁二烯-丙烯腈橡胶微粒和10wt%的二氧化硅纳米颗粒来改性热固性环氧聚合物。对于纯环氧聚合物（即，未改性的）和混合环氧聚合物。混合环氧聚合物的疲劳寿命比纯环氧聚合物高约6至10倍。其次，通过“柔性工具下的树脂灌注”装置将纯环氧树脂和混合环氧树脂灌注到准各向同性铺层E-玻璃纤维织物中，以制造玻璃纤维增强塑料（GFRP）复合材料面板。对这两种GFRP复合材料进行了应力比R = 0.1的拉伸疲劳试验，在此期间，对基体开裂和刚度退化进行了常规监测。与纯环氧树脂基体相比，采用混合环氧树脂基体的GFRP复合材料的疲劳寿命增加了约6至10倍。在混合环氧树脂基体中观察到基体开裂被抑制和裂纹扩展速率降低，这是由于橡胶微粒和二氧化硅纳米颗粒的存在引起的各种增韧微观机制造成的。这些因素被认为有助于提高疲劳寿命，这是观察到的GFRP复合材料采用混合环氧树脂基体。
A thermosetting epoxy-polymer was modified by incorporating 9 wt% of carboxyl-terminated butadiene-acrylonitrile rubber microparticles and 10 wt% of silica nanoparticles. The tensile fatigue behavior at a stress ratio, R = 0.1 for both the neat-epoxy polymer (i.e., unmodified) and the hybrid-epoxy polymer was first investigated. The fatigue life of the hybrid-epoxy polymer was about six to ten times higher than that of the neat-epoxy polymer. Secondly, the neat- and the hybrid-epoxy resins were infused into a quasi-isotropic lay-up, E-glass fiber fabric via a 'Resin Infusion under Flexible Tooling' set-up to fabricate glass-fiber reinforced plastic (GFRP) composite panels. The tensile fatigue tests at a stress ratio, R = 0.1 were performed on both of these GFRP composites during which the matrix cracking and stiffness degradation were routinely monitored. The fatigue life of the GFRP composite increased by about six to ten times due to employing the hybrid-epoxy matrix, compared to employing the neat-epoxy matrix. Suppressed matrix cracking and a reduced crack propagation rate were observed in the hybrid-epoxy matrix, which resulted from the various toughening micromechanisms induced by the presence of both the rubber microparticles and silica nanoparticles. These factors were considered to contribute towards the enhanced fatigue life which was observed for the GFRP composite employing the hybrid-epoxy matrix.