天线罩针刺织物根部结构设计及材料性能研究

针对耐高温天线罩对根部强度及根部材料与金属连接件热膨胀系数匹配性的特殊要求,设计了多种针刺结构石英纤维天线罩织物,并在罩体根部引入氧化铝纤维,系统研究了罩体根部材料的性能情况。结果表明适当降低网毡含量可以提升材料的拉伸性能,但材料的层间剪切强度会有所下降,压缩强度在网毡含量较低的情况下也有所降低。通过在根部引入氧化铝纤维,罩体根部的热膨胀系数有明显提升,但材料的高温拉伸强度随氧化铝纤维含量的增加呈先下降后上升的趋势。文中对相关工艺及材料性能研究为耐高温天线罩的设计提供了参考。

A Design of Root Structure with Needle Punching Fabric for Radome and Study of Properties of Composite Material

In view of a high temperature resistant radome setting special demands on root strength and matching of coefficient of thermal expansion between root material and metal connector, several kinds of quartz fiber fabric with needled structures for radome are designed, alumina fibers are introduced into the root of the needle punching fabric, and the properties of the composite materials at the root of the radome are studied systematically. The results show that the proper reduction of the content of felt in needle punching fabric can improve the tensile strength in the composite material but the inter-laminar shear strength and compressive strength of the composite can also be partly reduced. Although the coefficient of thermal expansion of the composite material at the root of radome can be improved by introducing the alumina fiber into the root of radome obviously, the tensile strength of the composite material at high temperature show a kind of U-shaped trend with the increasing content of alumina fibers, i.e. descending in advance and climbing behind. The research of the relevant technology provides a reference for the design of high temperature resistant radome.