纤维增强复合材料界面研究(四)——增强材料对界面粘结和复合材料力学性能的影响
INVESTIGATIONS ON INTERFACE FOR FIBER REINFORCED COMPOSITES PART Ⅳ: Effect of Reinforcements on Interfacial Bonding and Mechanical Properties of Composites
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摘要: 本文选用增韧E-51为基体分别与碳纤维、玻璃纤维和混杂纤维复合,测定了这两种复合材料的层间剪切强度、纵向冲击强度和层间断裂韧性。又通过扫描电镜观察断口形貌来研究增强材料与基体的界面粘结对复合材料力学性能的影响。研究结果表明增韧E-51基体在玻璃纤维表面形成一层厚度均匀的包复层。复合材料的破坏主要发生在包复层与基体之间,裂纹分枝多,Gc值高,而碳/增韧E-51中的碳纤维表面没有包复层,破坏发生在纤维与基体之间,裂纹分枝少,层间剪切强度与玻璃纤维复合材料相近而Gc值很低。本文还对比了增韧E-51基体与F-46基体在界面粘接中的作用。研究结果表明,用玻璃纤维与F-46复合,界面粘结牢固,复合材料的层剪强度很高,Gc值低。Abstract: There binds of fibers including carbon fiber,glass fiber and their hubrid were chosen as reinfonements in order to study their effect on fiber-matrix interfacial bonding and on mechanical properties of composites.
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