碳纤维含量对碳纤维增强PE复合材料力学性能的影响

Effect of Carbon Fiber Content on Mechanical Properties of Short Carbon Fiber Reinforced PE Composites

以短切碳纤维为增强体,以聚乙烯树脂为基体,运用螺杆注射成型的方法制备碳纤维增强热塑性复合材料。研究了碳纤维含量对复合材料硬度、拉伸、疲劳等性能的影响。结果表明,随着碳纤维含量的增加,复合材料的维氏硬度呈S形增加,拉伸强度、弹性模量、条件疲劳极限值都有提高;当碳纤维含量为4.021%时,相对纯聚乙烯,硬度、拉伸强度、弹性模量、条件疲劳极限值分别增加了35.489%、18.421%、208.024%、213.240%

Taking chopped carbon fiber as reinforce element and the polyethylene resin as matrix,the carbon fiber reinforced thermoplastic composites were prepared by the way of screw injection molding method.The effects of carbon fiber content on mechanical properties were investigated by measuring the hardness,tensile and fatigue.The results show that： with the increase of carbon fiber content,the hardness increase tendency in S-shape.The tensile strength and elastic modulus and the fatigue cycle and the fatigue limit were increased by 35.489%,18.421%,208.024%,213.240%,respectively.