复合材料湿法模压成型工艺参数研究

Parameters of Composites Wet Compression Molding

采用湿法模压成型(WCM)工艺制备碳纤维复合材料层合板,对浸润时间和固化压力两个工艺参数进行了设计,制备了不同参数的层合板。利用金相显微镜观察了不同参数制备层合板截面的微观形貌,对层合板成型质量进行表征,主要包括层合板厚度、纤维体积含量、短梁剪切强度(ILSS)、压缩强度以及拉伸强度的测试和计算。结果表明,当浸润时间4min、固化压力1MPa时,层合板的成型质量最好,截面缺陷较少,力学性能优良,力学强度相对提高5%~11.45%左右;随着浸润时间的增加,力学性能先迅速增大后趋于平缓,随着固化压力的增加,层合板的纤维体积含量和力学性能都逐渐增加,在浸润时间10min/固化压力1.5MPa时,纤维体积分数和拉伸模量达到最大值,为66.12%和86.50GPa。

The carbon fiber laminates are fabricated by wet compression molding method.We have designed two molding parameters of infiltration time and curing pressure to fabricate the laminates.The micro appearance of the laminates’section was observed by metalloscope.The molding qualities of laminates were represented,which include the thickness,fiber volume content,ILSS,compression and tensile strength.Results show that the laminates have good quality with the infiltration time being 4 minutes and the curing pressure being 1MPa,there are few defects in the section,and the mechanical properties have relatively improved by 5%–11.45%compared with others;with the increase of infiltration time,the mechanical properties showed a rapid and then slow trend;with the increase of curing pressure,the fiber volume content and tensile modulus of laminates showed an increasing trend.The fiber volume content and tensile modulus have the largest value 66.12%and 86.50GPa respectively,when the infiltration time is 10 minutes and the curing pressure is 1.5MPa.