中国空间科学技术

• •    

卫星复合材料构件在真空冷热循环中的永久变形及其预示

李立强,陈薇君,邱瑞源   

  1. 北京环境试验工程研究所 ,北京环境试验工程研究所 ,北京环境试验工程研究所
  • 发布日期:1988-06-25

PERMANENT DISTORTIONS AND IT'S PREDICTION OF SATELLITE COMPONENTS MADE OF COMPOSITE MATERIALS DURING THERMAL CYCLING TEST IN VACUUM

Li Liqiang Chen Weijun Qiu Ruiyuan (Beijing Institute of Environmental Test Engineering)   

  • Published:1988-06-25

摘要： 本文介绍了碳布铝蜂窝制成的天线反射器、小模型及其材料的真空冷热循环试验和永久变形的预示方法。在30次从-144～117℃的冷热交变循环过程中,测量了温度分布与相应的变形,给出了试验数据与图表。根据实测的永久变形与温度循环次数的关系,提出了一个幂函数的数学模型。利用该模型,根据少量试验数据可预示长期冷热循环下的永久变形或工作寿命。

关键词: 复合材料, 航天材料, 真空试验, 温度循环试验, 塑性变形, 预测

Abstract: This paper describes a thermal cycling test in vacuum of antenna paraboloidal reflector, small model and specimen, made of two carbon fibre sheets and one aluminum honeycomb core and gives the approach for predi- cting the permanent distortions. During thirty thermal cycles between -144℃ and +117℃ the temperature distribution and corresponding distortions were measured and some experimental data and diagram were given.On the basis of relationship between permanent distortion and thermal cycling number, we present mathematical model in terms of power function. Using this model the permanent distortion and work life in long term under thermal cycling can be predicted based on a few test data.

Key words: Composite, Aerospace material, Vacuum test, Temperature cycling test, Plastic deformation, Preduction.