气囊辅助RTM制备复合材料承力筒内腔尺寸控制技术

根据气囊充压压力与复合材料承力筒内径之间的变化关系,给出了成型复合材料承力筒内表面的气囊尺寸计算方程。分析了气囊充压压力增大对承力筒的壁厚、纤维含量和弯曲性能的影响。采用气囊辅助RTM工艺整体制备出复合材料承力筒。试验结果表明,气囊充压压力使复合材料承力筒的壁厚减薄,纤维体积含量增加,弯曲性能提高;选择适当的气囊充压压力可以制备出满足设计要求的复合材料承力筒。

Precise Manufacture of Composite Bearing Cylinder by Bladder-assisted RTM Process

The equation for calculating Bladder dimension is derived based on the relationship between bladder pressure and the inner diameter of composite bearing cylinder.Effects of bladder pressure on the thickness,fiber volume fraction and bending properties of composite bearing cylinder were investigated.The composite bearing cylinder was manufactured by bladder-assisted resin transfer molding(BARTM) process.The experimental result shows that higher bladder pressure decreases thickness of composite bearing cylinder,increases fiber volume fraction and improves the bending properties.This indicates that composite bearing cylinder can be manufactured with precise inner diameter by BARTM process with a proper bladder pressure.