超声波在炭纤维织物复合材料中树脂囊界面声压反射系数可达21%,在层间界面的反射则与树脂层的厚度和声波频率有关,在缺陷界面则会产生绝对反射.研究了人射声波在织物复合材料内部树脂囊、编织纤维束和层间界面产生的声波反射信息,揭示织物复合材料内部铺层和层间界面微结构的三维分布特征.结果表明,采用高分辨率超声成像方法,可以较好地再现织物复合材料中的树脂囊和纤维束形状、取向、铺层方向及层间界面等三维分布特征,为织物复合材料提供一种有效的微结构表征和缺陷检测方法.
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