Reduction of void content of vacuum-assisted resin transfer molded composites by infusion pressure control
Reduction of void content of vacuum-assisted resin transfer molded composites by infusion pressure control
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DOI：
10.1002/pc.23071
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发表时间：
2015-09-01
影响因子：
5.2
通讯作者：
Xu, Changheng
中科院分区：
文献类型：
--
作者：
Chen, Dingding;Arakawa, Kazuo;Xu, Changheng
树脂辅助传递模塑是一种很有前途的制造大型复杂复合材料结构的技术。然而，空洞的形成仍然是一个问题。实验研究了树脂流动不均匀和树脂在低压下连续蒸发两种主要的致孔因素。建议改进排气口处的压力控制以减少所制造的复合材料的空隙含量：在树脂灌注开始时，将排气口处的压力设定为设备的完全真空，而在树脂已经饱和所有增强材料之后，排气口处的压力略微增加。在灌注开始时的完全真空避免了空气截留，并且在该过程中稍后的稍高压力抑制了树脂蒸发。获得较低的空隙含量。Polym.比较器：36：1629-1637，2015. (c)2014年塑料工程师学会
Vacuum-assisted resin transfer molding is a promising technique for making large and complex composite structures. However, void formation remains a problem. Two primary contributors to void formation, non-uniform resin flow and continuous evaporation of resin under low pressure, were experimentally studied. Improved pressure control at the vent is proposed to reduce the void content of the manufactured composite material: at the start of the resin infusion, the pressure at the vent is set to the full vacuum of the equipment, while after the resin has saturated all of the reinforcements, the pressure at the vent is increased slightly. The full vacuum at the start of infusion avoids air entrapment, and the slightly higher pressure later in the process restrains the resin evaporation. A lower void content is obtained. POLYM. COMPOS., 36:1629-1637, 2015. (c) 2014 Society of Plastics Engineers