高低温循环对臂杆组件宏观尺寸形位精度的影响

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Influence of high and low temperature cycles on the macrodimensional size and position accuracy of the rod assembly

ZHOU Xiuyan*，WANG Ziqiao，KUANG Naihang，ZHU Nan，XU Chongyu， ZHOU Lei （Harbin FRP Institute Co.，Ltd.，Harbin 150028）

Abstract：Inorder to studythe changes inmacro-dimensional size and position accuracyof compositecomponents after highandlowtemperaturecycling，fivebatchesof twocarbonfibers（M4OJBandT7OoSC）were testedatthemateriallevel，the bendingstiffessofcompositecomponent-levelrectangularpipefitings wastested，andthedimensional geometricaccuacy of therodassemblybeforeandafterhighandlow temperaturecycles was tested.Theresultsshowedthatthe maximumceficientof variationof tensile strength andelastic modulusof M4OJBcarbon fiber bundleyarn was O.O34and O.012 in 5 batches，ndthe maximumcoeffcientof variationof tensilestrengthandelastic modulus in5batchesofT7oSC was 0.043 and0.034.Theaverage bending stiffessof M4OJB gradecarbon fibercompositerectangularpipe fitings intheXdirection was 4849.4N·m² and7266.6 N ⋅m2 in theY direction of the five batches，and the stiffness trend in the two directions was the same，and thedispersion wassmall.After12.5cycles，therelativedistance from theXOY planechanged significantlyand the geometricaccuacyrelatedtotheYOZplaneremainedbasicallyunchanged，andtheoveralldimensional geometricaccuracy variables did not exceed O.15 mm.

Keywords：composites;internal stresses; effectsof highandlowtemperaturecycles;dimensional geometricstability

1引言

卫星在绕地球进行近地空间飞行时受到包括空间真空、原子氧、高低温循环变化等恶劣环境的影响，导致复合材料制品物理、力学以及化学性能的变化。（剩余4190字）