单向芳纶/玻璃纤维混杂复合材料板材拉伸性能研究

本文对单向芳纶/玻璃纤维复合材料进行制作,对其纵向拉伸强度、拉伸模量和弹性伸长进行实验分析。实验结果表明,单向混杂复合材料的拉伸断裂大多为多次性,界面数越多,一次性断裂的可能性越大。界面数为1的混杂纤维复合材料的芳纶纤维体积含量在对拉伸强度影响上的存在临界值,表现出明显的混杂效应。界面数大于1的混杂复合材料在芳纶纤维铺层数一定的情况下,界面数的多少不影响混杂复合材料拉伸强度和拉伸弹性模量的大小。界面数大于1比界面数为1的复合材料的拉伸强度和拉伸模量明显偏高。同时对不同制作条件下纯玻璃纤维单向复合材料的拉伸性能进行剖析。

TENSILE PROPERTY STUDY OF UNIDIRECTIONAL KEVLAR/GLASS FIBER HYBRID COMPOSITES

The unidirectional kevlar/glass fiber hybrid composites are made in the present work.The longitudinal tensile strength and stretch modulus have been tested and analyzed.The results showed that most of the fracture of unidirectional hybrid composites are multiple.The more the hybrid interface is,the more possibility the one session fracture is.There is a critical value of Kevlar volume content to the one-hybrid-interface composites,which shows a typical hybrid effect.As to the hybrid composites of more than one interface,if the layer number is certain,the number of interface have a little influence on the tensile strength and stretch modulus of hybrid composites.The tensile strength and stretch modulus of the composites,which the interface number is one,are much higher than that of more than one interface.The tensile properties of pure glass fiber unidirectional composites prepared under different conditions are analyzed.