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首页> 外文期刊>Composite Structures >Effect of water absorption on Mode I interlaminar fracture toughness of flax/basalt reinforced vinyl ester hybrid composites
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Effect of water absorption on Mode I interlaminar fracture toughness of flax/basalt reinforced vinyl ester hybrid composites

机译：吸水率对亚麻/玄武岩增强乙烯基酯杂化复合材料I型层间断裂韧性的影响

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摘要

In this study, the influence of water absorption on the Mode I interlaminar fracture toughness of flax and basalt fibre reinforced vinyl ester hybrid composites is presented. Three types of composite laminates namely, flax fibre reinforced vinyl ester (FVE), flax fibre hybridised basalt unstitched (FBVEu) and flax hybridised basalt stitched (FBVEs), fabricated by vacuum infusion technique are investigated. Double cantilever beam (DCB) tests were performed to evaluate the Mode I critical energy release rate (G(IC)) and the crack length (R-curve) by using three different data reduction methods. It was found from the experimental results that the Mode I fracture toughness initiation and propagation of water immersed FVE composites were decreased by an average of 27% and 10% respectively, compared to the dry specimens, whereas the fracture toughness propagation of water immersed FBVEu and FBVEs composites were improved by approximately 15% and 17% compared to dry specimens. The fractured surface and delamination of different composites were evaluated by using scanning electron microscopy (SEM) and X-ray computed micro-tomography (ACT). The results showed that basalt fibre hybridisation has positive effects on durability and the moisture resistance of natural fibre composites. (C) 2017 Elsevier Ltd. All rights reserved.
机译：在这项研究中，提出了吸水率对亚麻和玄武岩纤维增强的乙烯基酯杂化复合材料的I型层间断裂韧性的影响。研究了通过真空灌注技术制备的三种类型的复合层压板，分别是亚麻纤维增强乙烯基酯（FVE），亚麻纤维未缝合玄武岩纤维（FBVEu）和亚麻纤维混杂玄武岩缝合纤维（FBVEs）。通过使用三种不同的数据缩减方法，进行了双悬臂梁（DCB）测试，以评估模式I的临界能量释放率（G（IC））和裂纹长度（R曲线）。从实验结果中发现，与干燥样品相比，水浸式FVE复合材料的模式I断裂韧性的起始和扩展分别降低了27％和10％，而水浸式FBVEu和FVE复合材料的断裂韧性的传播则降低了。与干燥样品相比，FBVEs复合材料分别改善了约15％和17％。使用扫描电子显微镜（SEM）和X射线计算机断层扫描（ACT）对不同复合材料的断裂表面和分层进行评估。结果表明，玄武岩纤维杂化对天然纤维复合材料的耐久性和耐湿性具有积极影响。 （C）2017 Elsevier Ltd.保留所有权利。

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