SRM复合材料壳体湿热老化双因素显著性研究

Double Factors Remarkable Analysis for Composite Shell of Solid Rocket Motor

本文采用加速湿热老化试验(60℃/80%RH、60℃/95%RH、70℃/80%RH、70℃/95%RH),研究了玻璃纤维复合材料在湿热条件下的性能变化,并利用Origin软件绘制了最大拉伸强度-时间曲线。采用双因素显著性分析的方法建立了数学模型,针对两种因素(温度和湿度)在老化过程中对玻璃纤维复合材料最大拉伸强度的影响进行了量化研究。结果表明:湿热条件下复合材料力学性能下降明显;加速老化初期(2天),温度和湿度的单独作用不明显,对应的F值分别为1.347615和1.107897,都小于Fcrit(3.458);加速老化中期(6天和14天),温度和湿度的单独作用比较明显,对应的F值也比Fcrit大;加速老化后期(28天),湿度的影响凸显,其F值为16.74582。

ABSYRACT In this paper,the accelerated hygrothermal aging test（60℃/80%RH、60℃/95%RH、70℃/80%RH、70℃/95%RH）is used to research properties changing law of a glass-fiber wound composite sample under hygrothermal environ-ment, and the curve of maximum tensile strength with aging time is drawn using Origin. The mathematical model based on double factors remarkable analysis method is constructed to confirm main factor（temperature and humidity）which effects maximum tensile strength in the different time.The result shows that the mechanical properties of composite drop markedly;At initial stage（2 days）, the effect of temperature and humidity is not dominative,the value of their F （1.347615 and 1.107897） are smaller than Fcrit （3.458） ;At middle stage（6 days and 14 days）, the single effect of temperature and humidity becomes markedly（F 〉 Fcrit） ; at last stage（28 days）,humidity is the main factor that affects the composite performance.