环氧树脂/碳纤维复合材料模压制品冲击强度影响因素分析

Analysis of influence factors on impact strength of epoxy/carbon⁃fiber⁃composite⁃molded products

通过正交试验研究了模压温度、模压压力、保压时间、合模速度对环氧树脂/碳纤维片状模塑料模压成型制品冲击强度的影响,制品冲击强度表现出显著的各向异性。使用极差法证明各因素对冲击强度的影响大小为:保压时间t>合模速度v>模压温度T>模压压力P;得到最佳工艺参数组合为:模压温度T为130℃、模压压力P为500 kN、保压时间t为540 s、合模速度v为1 mm/s,使用该参数组进行验证实验,新制品冲击强度相较于正交试验中的最大值提高了9.75%。结合典型冲击断裂试样的微观形貌解释了影响因素作用于制品冲击强度的微观机制。

The influence of molding temperature,molding pressure,holding time,and closing speed on the impact perfor-mance of epoxy resin/carbon-fiber-laminate-molded products was investigated through an orthogonal experiment.The of products exhibited significant anisotropy in their impact strength.A range analysis method was used to demonstrate the influence of each factor on the impact performance by an increasing order as follows:holding time>closing speed>mold-ing temperature>molding pressure.The optimal combination of process parameters was determined to be a molding tem-perature of 130℃,a molding pressure of 500 kN,a holding time of 540 s,and a closing speed of 1 mm/s.Compared to the maximum value obtained in the orthogonal experiment,the validation experiment based on this parameter combina-tion for the new products showed an increase in the impact strength by 9.75%.The microstructure of typical impact frac-ture samples was analyzed to explore the microscopic mechanism of the influencing factors on the impact performance of the products.