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Impact energy absorption of flax fiber-reinforced polypropylene composites

机译：亚麻纤维增强聚丙烯复合材料的冲击能量吸收

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This work investigates the effects of fiber content and fiber orientation on the impact behavior of flax fiber-reinforced polypropylene (PP) composites. The laminates of various fiber contents were manufactured by a vacuum bagging process; their impact properties were then measured using Charpy (i.e., in-plane impact load) and drop weight (i.e., out-of-plane impact load) impact tests. Experiments were conducted on a range of samples with different fiber volume fractions and orientations. The results show significant variations in energy absorption according to the variations in fiber orientation. Composites with differing fiber orientations exhibit different energy absorption for the in-plane and out-of-plane impact loads. The maximum Charpy energy absorption is obtained for the case of 0 degrees fiber orientation, with the energy absorption generally lying in the range of 25-171 J/m. For the out-of-plane impact, the composites containing 30 degrees fiber orientation absorb the highest amount of impact energy, and they can offer a better impact resistance in terms of higher peak force. The energy absorption generally lies in the range of 20-32 J. It was found that the energy absorption increases with increasing fiber content in the former (i.e., in-plane impact load) and decreases in the latter (i.e., out-of-plane impact load). Fiber orientations influence the crack propagation and failure mode of the composites. The outcomes from this study indicate that flax fiber-reinforced composite could be a commercially viable material for lightweight, crashworthy, and impact-critical structures. POLYM. COMPOS., 39:4165-4175, 2018. (c) 2017 Society of Plastics Engineers
机译：该作品研究了纤维含量和纤维取向对亚麻纤维增强聚丙烯（PP）复合材料的影响行为的影响。通过真空装订工艺制造各种纤维内容物的层压材料;然后使用夏比（即面内冲压）和滴重量（即面内冲击载荷）冲击试验测量它们的影响性质。在具有不同纤维体积分数和取向的一系列样品上进行实验。结果显示了根据纤维取向变化的能量吸收的显着变化。具有不同纤维取向的复合材料表现出不同的能量吸收与面内和平面外冲击载荷。为0度纤维取向的情况获得最大夏比能量吸收，其能量吸收通常位于25-171J / m的范围内。对于平面外冲击，含有30度纤维取向的复合材料吸收最高的冲击能量，并且它们可以在更高的峰值力方面提供更好的抗冲击性。能量吸收通常位于20-32J的范围内。发现能量吸收随着前者（即面内冲击载荷）的增加而增加，并且在后者（即，OUT-）中减少（即，平面冲击载荷）。纤维取向会影响复合材料的裂缝传播和故障模式。本研究的结果表明，亚麻纤维增强复合材料可以是用于轻质，抗滑性和临界结构的商业上可行的材料。聚合物。 Compos。，39：4165-4175,2018。（c）2017年塑料工程师协会

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