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单向玻璃纤维/树脂复合材料的Ⅱ型断裂研究

, PP. 65-70

Keywords: 单向复合材料,超声波技术,ENF试样,Ⅱ型静、动态裂纹扩展

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Abstract:

本文研究了长玻璃纤维强化的树脂基复合材料的Ⅱ型断裂韧性及裂纹扩展速率。作者使用了超声波技术来测定复合材料的弹性模量,测定的结果与混合定律计算的结果吻合的很好。ENF三点弯曲试样被用来测定GⅡc和da/dn与ΔGⅡ的关系。通过理论分析,梁内剪应力对用梁理论计算出的GⅡ的影响误差约为3%.对断口的分析显示了不同的断裂类型会带来不同的微观断口形貌。

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