碳-芳纶混杂正交三向复合材料疲劳性能实验研究

发布时间：2018-01-08 02:12

本文关键词：碳-芳纶混杂正交三向复合材料疲劳性能实验研究　出处：《固体火箭技术》2017年05期 　论文类型：期刊论文

【摘要】：采用三维机织工艺结合树脂传递模塑(RTM)技术制备了两种碳-芳纶混杂正交三向复合材料,即z向纱均采用芳纶纤维,经纬纱分别为炭纤维和经纬纱间隔排列炭纤维和芳纶纤维的混杂正交三向复合材料,以恒定应力幅值、应力比和频率,开展了复合材料经向拉伸疲劳性能试验,通过与炭纤维复合材料的对比,分析了碳-芳纶混杂方式对复合材料拉伸疲劳性能(疲劳寿命、疲劳破坏特征和疲劳后强度/刚度)的影响。当z向纱选用芳纶纤维,面内经纬纱为炭纤维的混杂复合材料经向拉伸疲劳寿命表现出正混杂效应;当进一步混入芳纶纤维,面内经纬纱为炭纤维和芳纶纤维间隔排列正交三向复合材料疲劳寿命表现为负混杂效应,对疲劳刚度损失有一定的抑制作用。可见,炭纤维正交三向复合材料中引入芳纶纤维,对其复合材料拉伸疲劳性能有重要影响,通过设计纤维混杂方式和混杂比例可进一步提高复合材料疲劳性能。
[Abstract]:Using 3D woven technology combined with resin transfer molding (RTM) technology to prepare two carbon Kevlar hybrid composite to three orthogonal Z, namely to adopt aramid fiber yarn, warp yarn and weft yarn are respectively arranged at intervals of carbon fiber carbon fiber and aramid fiber hybrid composite material to three orthogonal. With the constant stress amplitude, stress ratio and frequency, carried out by the test to the composite tensile fatigue performance, compared with carbon fiber composites, carbon Kevlar hybrid of composite tensile fatigue performance analysis (fatigue life, fatigue failure characteristics and fatigue strength / stiffness) effect. When the Z to the aramid fiber yarn, yarn surface for hybrid composite carbon fiber warp tensile fatigue life showed positive hybrid effect; when further mixed with aramid fiber, surface yarn for carbon fiber and aramid fiber spaced orthogonal to the complex three The material fatigue life showed a negative hybrid effect, has certain inhibitory effect on fatigue stiffness loss. Therefore, carbon fiber composite material is introduced in the three orthogonal to the aramid fiber, has important influence on the composite tensile fatigue performance, through the design of hybrid and hybrid ratio can improve the fatigue properties of composite materials.

【作者单位】：天津工业大学教育部和天津市先进纺织复合材料重点实验室复合材料研究所;
【基金】：国家质量监督检验检疫总局项目(201210260) 国家自然基金青年科学基金(11102133)
【分类号】：TB332
【正文快照】： 0引言两种及以上纤维增强同一种树脂基体的混杂纤维复合材料可发挥各组分纤维的优点,克服纤维的某些缺点[1]。碳-芳纶混杂复合材料因纤维的混杂效应,既能利用炭纤维高强度、高模量的刚性,又能发挥芳纶纤维高断裂韧性和抗冲击性能[2-3],从而保持炭纤维复合材料刚度与强度的同时

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