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真空辅助成型工艺中预成型体的厚度变化与过流控制

, PP. 244-248

Keywords: 复合材料,真空辅助成型,预成型体,过流控制,厚度,纤维体积分数

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Abstract:

采用无接触式电涡流位移传感系统,对真空辅助成型工艺中预成型体的厚度变化进行了实时监测。揭示了该成型工艺过程中预成型体的厚度变化规律,并考察了树脂过流控制时间对制件厚度与纤维体积含量的影响。结果表明,在整个工艺过程中预成型体的厚度变化可分为三个阶段:在树脂浸入后,预成型体厚度迅速增加;在树脂过流控制阶段,预成型体厚度变化较小且保持在较高水平;在树脂管关闭后,预成型体厚度迅速下降并逐渐趋于稳定。制件厚度与树脂过流控制时间的变化关系类似于正弦曲线,在树脂过流控制时间约为10min时,纤维体积分数最低,较无过流控制降低1.7%;在树脂过流控制时间约为40min时,纤维体积分数最高,较无过流控制提高1.6%。

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