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Mechanical Properties of Kenaf/Polypropylene Nonwoven Composites

机译:红麻/聚丙烯非织造复合材料的机械性能

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摘要

With an industrial trend of going green, the use of natural fibers in polymer composites is growing rapidly, especially in the automotive industry. The objectives of this research are to investigate mechanical performance of kenaf/polypropylene nonwoven composites (KPNCs) in production of automotive interior parts, and to develop preliminary linear models for quantifying elastic range of the KPNCs under various loading conditions. Using polypropylene (PP) fiber as bonding fiber, the KPNCs were fabricated with 50/50 blend ratio by weight. Unlike the manufacturing method of fiber reinforced plastics, all KPNCs were produced by carding and needle-punching techniques and thermally bonded by a panel press with 3-mm thickness gauge. Mechanical properties of the KPNCs in terms of uniaxial tensile, open-hole tensile, tensile at different strain rates, flexural, and in-plane shear were measured instrumentally. It was found that sample which was processed at higher temperature (230 ℃) but shorter time (60 s) had the best mechanical performance. KPNCs were relatively insensitive to the notch but sensitive to strain rates. The linear elastic finite element model of KPNCs agreed well with the experimental results in the valid strain range of 0-0.5 % for uniaxial tensile test and 0-1 % for flexural test.
机译:随着工业走向绿色的趋势,天然纤维在聚合物复合材料中的使用正在迅速增长,特别是在汽车工业中。这项研究的目的是研究洋麻/聚丙烯非织造复合材料(KPNC)在汽车内饰件生产中的机械性能,并开发初步的线性模型来量化KPNC在各种载荷条件下的弹性范围。使用聚丙烯(PP)纤维作为粘结纤维,以50/50的混合比制造KPNC。与纤维增强塑料的制造方法不同,所有KPNC都是通过梳理和针刺技术生产的,并通过带有3毫米厚度规的平板压机进行热粘合。仪器测量了KPNC的机械性能,包括单轴拉伸,开孔拉伸,不同应变速率下的拉伸,挠曲和面内剪切。发现在较高温度(230℃)但时间较短(60 s)下处理的样品具有最佳的机械性能。 KPNC对缺口相对不敏感,但对应变率敏感。 KPNCs的线性弹性有限元模型与实验结果吻合良好,在单轴拉伸试验的有效应变范围为0-0.5%,弯曲试验的有效应变范围为0-1%。

著录项

  • 来源
    《Journal of Polymers and the Environment》 |2012年第4期|959-966|共8页
  • 作者单位

    Texas Materials Institute Materials Science and Engineering Program, The University of Texas at Austin, Austin, TX 78712, USA,School of Human Ecology, The University of Texas at Austin, Austin, TX 78712, USA;

    Department of Aerospace Engineering and Engineering Mechanics, The University of Texas at Austin, Austin, TX 78712, USA;

    Texas Materials Institute Materials Science and Engineering Program, The University of Texas at Austin, Austin, TX 78712, USA,School of Human Ecology, The University of Texas at Austin, Austin, TX 78712, USA;

    Department of Aerospace Engineering and Engineering Mechanics, The University of Texas at Austin, Austin, TX 78712, USA;

    Texas Materials Institute Materials Science and Engineering Program, The University of Texas at Austin, Austin, TX 78712, USA,School of Human Ecology, The University of Texas at Austin, Austin, TX 78712, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    kenaf/polypropylene nonwoven composites; uniaxial tensile; open-hole tensile; strain rate effect; flexural; in-plane shear; finite element;

    机译:洋麻/聚丙烯非织造复合材料;单轴拉伸裸眼拉伸应变率效应弯曲面内剪切有限元;

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