摘要: |
蜂窝夹层复合材料航天器平台结构具有高定位精度、高平面度的技术需求,模具对成型质量及精度具有重要作用,尤其是组孔精度的关键影响因素。针对碳纤维复合材料面板铝蜂窝夹层结构,研究了模具材料对夹层结构成型孔精度的影响。结果表明,相同模具材料制备的试样组孔偏差随组孔间距理论值增加;不同模具材料因线膨胀系数不同,制备的蜂窝夹层材料组孔偏差由大到小依次为铝模具、钢模具、碳模具。此外,基于夹层结构固化制度建立了组孔偏差的计算模型,得到的不同模具材料制备组孔最大偏差的理论值接近测量结果,验证了组孔偏差分析模型的正确性及可靠性,为航天飞行器的复合材料夹层结构成型精度控制奠定理论基础。 |
关键词: 蜂窝夹层结构;模具材料;组孔间距;线膨胀系数 |
基金项目: |
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Application Problems of Mould Material on The Manufacturing of Honeycomb Sandwich Composites Composed of Carbon Panel and Aluminum Honeycomb Core |
Zhou Chuanzhong1, Sun Hongjie Yu Yalin Wang Lechen Liu Chunli2
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1. The First Military Representative Office of Beijing Bureau of the Ministry of Naval Equipment;2. Aerospace Research Institute of Materials & Processing Technology
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Abstract: |
The instrument installation platform manufactured by honeycomb sandwich composites in spacecraft needs high technical requirements of position and flatness. The mould material is of great importance to the manufacturing quality and accuracy, especially to the manufacturing accuracy of the threaded hole distance. The influences of mold materials on the manufacturing accuracy of the threaded hole distance in the honeycomb sandwich structure were investigated in this study, which was composed of carbon fiber reinforced composite panel and aluminum honeycomb core. The result reveals that the deviation linearly increases with the increase of the threaded hole distance in the specimens manufactured using the same mold materials. The difference between coefficients of thermal expansion of mould materials accounts for the deviation difference of the threaded hole distances in the specimens, which has a descending order of aluminum, steel and composite. Besides, the calculation model for the threaded hole distance deviation is established considering the cure cycle of the honeycomb sandwich structure. The calculation value is consistent with the measurement value, which proves the validity and reliability of the theoretical model. This study has built the theoretical basis for the manufacturing accuracy control of the honeycomb sandwich structure in spacecraft. |
Key words: honeycomb sandwich structure;mould material;threaded hole distance;coefficient of thermal expansion |