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Damage investigation and assessment due to low-velocity impact on flax/glass hybrid composite plates

机译：低速冲击亚麻/玻璃混合复合板造成的损害调查和评估

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摘要

There is limited information available in the body of knowledge regarding to the low velocity impact damage characteristics of sustainable bio-based such as flax fibre reinforced composites. This paper presents the results of full investigation of impact damage mechanisms on flax/vinyl ester laminated composite and flax-glass/vinyl ester hybrid composite laminates caused by low-velocity impact using a drop weight impact machine. The specimens were subjected to incident energy levels of 25 J and 50 J, in order to achieve a damage up to perforation and complete penetration. A 3D Finite Element Analysis (FEA) model was also developed using Hashin failure criteria. The damage and the predicted delaminations were compared using a high-resolution micro-Computed Tomography (mu-CT) technique. The results of the numerical analysis correlated well with the experiments and the imaging, which provided a full verification of the exact position of delaminations due to impact within the composite laminates.
机译：关于可持续生物基（如亚麻纤维增强复合材料）的低速冲击损伤特性，知识体系中可用的信息有限。本文介绍了通过落锤式冲击机对低速冲击引起的亚麻/乙烯基酯层压复合材料和亚麻玻璃/乙烯基酯杂化复合材料层压材料的冲击损伤机理的全面研究结果。样品经受了25 J和50 J的入射能级，以达到直至穿孔和完全穿透的破坏。还使用Hashin失效准则开发了3D有限元分析（FEA）模型。使用高分辨率的微型计算机断层扫描（mu-CT）技术比较了损伤和预计的分层。数值分析的结果与实验和成像很好地相关，这提供了对复合材料层压板内部碰撞所致分层的确切位置的全面验证。

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