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对大麻纤维增强不饱和聚酯合成材料进行低速冲击响应试验,研究无编织大麻纤维增强材料冲击性能的效果。对纤维体积分数为0,0.06,0·10,0.15,0.21,0.26的大麻纤维增强不饱和聚酯合成材料试件的冲击响应与包含相同纤维体积分数被E-玻璃纤维缠绕的试件进行比较,采用扫描电子显微镜(SEM)评估冲击后的损坏程度。当大麻纤维作为加固材料时,承载力和冲击能量吸收显著提高。结果表明:纤维体积分数、复合层压板的刚度、冲击荷载和总吸收能之间存在明确的相关性。当出现低峰荷载、低冲击能以及破坏时间小于大麻纤维增强不饱和聚酯合成材料时,不饱和聚酯合成材料控制试件显示脆性破坏的性能。冲击试验结果显示:纤维体积率含量为0.21的大麻增强加固试件的冲击响应,与包含相同纤维体积分数被E-玻璃纤维缠绕的不饱和聚酯合成材料试件具有可比性。
The hemp fiber reinforced unsaturated polyester composites were subjected to low-speed impact test to study the impact of non-woven hemp fiber reinforced material impact properties. The impact response of hemp fiber reinforced unsaturated polyester composites with fiber volume fraction of 0,0.06,0 · 10,0.15,0.21,0.26 was compared with that of the samples containing the same fiber volume fraction by E-glass fiber wound , The degree of damage after impact was evaluated by a scanning electron microscope (SEM). When hemp fibers are used as reinforcing material, the bearing capacity and impact energy absorption are significantly increased. The results show that there is a clear correlation between fiber volume fraction, stiffness of composite laminates, impact load and total absorbed energy. When low peak load, low impact energy and failure time were less than hemp fiber reinforced unsaturated polyester composites, unsaturated polyester composites controlled the brittle failure behavior of specimens. The results of the impact test showed that the impact response of the cannabis-reinforced and stiffened specimens with fiber volume fraction of 0.21 was comparable to that of specimens made of unsaturated polyester with the same fiber volume fraction being entangled with E-glass fibers.