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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%
Using chopped carbon fiber as reinforcing body and polyethylene resin as matrix, a carbon fiber reinforced thermoplastic composite material is prepared by a screw injection molding method. The effect of carbon fiber content on the properties of composite materials such as hardness, tensile and fatigue properties was studied. The results show that with the increase of carbon fiber content, the Vickers hardness of the composites increases in S shape, and the ultimate tensile strength, elastic modulus and fatigue limit of the composites increase. When the carbon fiber content is 4.021%, the relative pure polyethylene, Hardness, tensile strength, elastic modulus and fatigue limit increased by 35.489%, 18.421%, 208.024%, 213.240% respectively,