碳纤维增强环氧树脂复合材料耐撞性的实验表征

IF 11.5 1区 工程技术 Q1 ENGINEERING, AEROSPACE
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引用次数: 0

摘要

结构的耐撞性是衡量其在动态事件中通过可控方式吸收碰撞能量的保护能力。纤维增强复合材料可以替代韧性金属作为耐撞结构的冲击能量吸收体。事实上,复合材料具有机械性能高、重量轻、可根据具体要求进行设计以及良好的能量吸收能力等特点。然而,长纤维复合材料的抗冲击性和损坏模式涉及不同的因素(组成材料、几何形状、铺设、制造工艺),很难预测。此外,目前还没有评估复合材料耐撞性的标准实验程序。因此,对不同几何形状的复合材料进行大量适当的实验表征有助于了解其在动态载荷作用下的失效机理。在这项工作中,为了研究宽度和形状的影响,通过真空灌注工艺实现了三种不同的碳纤维环氧复合材料。特别是制造了两种平面复合材料和一种 C 形复合材料,并根据三点弯曲程序在不同冲击速度下进行了夏比试验。此外,还使用防屈曲夹具对较大的平面复合材料进行了平面内压缩试验,以评估比能量吸收(SEA)。结果表明了冲击速度对 c 型复合材料的抗冲击性、最大刚度和损坏模式的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental characterization of the crashworthiness of carbon fiber reinforced epoxy composites

The crashworthiness of a structure is a measure of its protective capability under dynamic events by absorbing the crash energy in a controlled way. Fiber reinforced composite materials can represent a valid alternative to ductile metals as impact energy absorbers in a crashworthy structure. In fact, composites are characterized by high mechanical properties coupled with low weight, capability to be designed by tailoring the specific requirements and good energy absorption capabilities. However, the impact resistance and the damage modes of long fiber composites involve different factors (constituent materials, geometry, lay up, manufacturing process) and are difficult to predict. In addition, there are no standard experimental procedures to assess the crashworthiness of composite materials. Therefore, a large and proper experimental characterization on composites with different geometries can be useful to understand the failure mechanisms under dynamic loads.

In this work, three different kinds of carbon fiber epoxy composites have been realized by vacuum infusion process in order to investigate the effect of the width and the shape. In particular, two plane and one C-shaped composites have been manufactured and characterized with Charpy test at different impact velocity according to the three-point bending procedure. Further, in-plane compression tests on larger flat composites have been performed by using an anti-buckling fixture to evaluate the specific Energy Absorption (SEA). Results evidenced the effect of the impact velocity on the impact resistance, the greatest rigidity of the c-shaped composite and the damage modes.

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来源期刊
Progress in Aerospace Sciences
Progress in Aerospace Sciences 工程技术-工程:宇航
CiteScore
20.20
自引率
3.10%
发文量
41
审稿时长
5 months
期刊介绍: "Progress in Aerospace Sciences" is a prestigious international review journal focusing on research in aerospace sciences and its applications in research organizations, industry, and universities. The journal aims to appeal to a wide range of readers and provide valuable information. The primary content of the journal consists of specially commissioned review articles. These articles serve to collate the latest advancements in the expansive field of aerospace sciences. Unlike other journals, there are no restrictions on the length of papers. Authors are encouraged to furnish specialist readers with a clear and concise summary of recent work, while also providing enough detail for general aerospace readers to stay updated on developments in fields beyond their own expertise.
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