采用单向法测量了三维编织预制件的饱和与不饱和渗透率,从渗透率实验确定了毛细压力,研究了纤维体积分数对饱和、不饱和渗透率的影响.分析了编织参数、注入压力对渗透率测量的作用,以注入压力Pm为x轴,以相同的某一段时间所到达的流动前沿的平方(x2)为y轴作图,并拟合成直线,该直线与x轴的水平截距即为毛细压力.实验结果表明:随着纤维体积分数的增加,饱和渗透率与不饱和渗透率均降低,且饱和渗透率大于不饱和渗透率;编织结构影响渗透率,不饱和渗透率随着编织角的增加而减小;准确的渗透率的测试结果不依赖注入压力,开始阶段渗透率值较大,随着充模距离的增加,渗透率逐渐降低,并趋于稳定值.
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