碳/玻纤混杂纤维增强环氧复合材料的静态和疲劳拉伸性能

摘要整理

研究了高强度聚丙烯腈（PAN）基碳纤维（IMS60）和电子级玻璃纤维（E-glass）混杂纤维增强环氧基体复合材料（HFRPs）的静态和疲劳拉伸性能。采用单向铺层设计，设置了[(0(IMS60))/(0(E-glass))]S、[(0(IMS60))/(0(E-glass))/(0(E-glass))/(0(IMS60))]、[(0(E-glass))/(0(IMS60))]S、[(0(E-glass))/(0(IMS60))2]S、[(0(E-glass))/(0(IMS60))3]S、[(0(E-glass))/(0(IMS60))5]S、[(0(E-glass))2/(0(IMS60))]S、[(0(E-glass))3/(0(IMS60))]S和[(0(E-glass))5/(0(IMS60))]S等多种铺层方案。静态加载下，[(0(IMS60))/(0(E-glass))]S等五种铺层的应力-应变曲线呈线性关系至失效；而[(0(E-glass))2/(0(IMS60))]S等三种铺层的应力-应变曲线呈现复杂的锯齿状特征。采用Weibull统计分布分析拉伸强度，混杂复合材料的Weibull模数均高于单一碳纤维增强环氧复合材料（CFRP）和玻纤增强环氧复合材料（GFRP）。疲劳加载下，混杂复合材料在高应力水平表现出CFRP主导行为，在低应力水平表现出GFRP主导行为。随着CFRP体积分数增加，疲劳性能依次提升：[(0(E-glass))/(0(IMS60))5]S > [(0(E-glass))/(0(IMS60))3]S > [(0(E-glass))/(0(IMS60))2]S > [(0(IMS60))/(0(E-glass))]S > [(0(E-glass))/(0(IMS60))]S > [(0(E-glass))2/(0(IMS60))]S > [(0(E-glass))3/(0(IMS60))]S > [(0(E-glass))5/(0(IMS60))]S。

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