In this work, the normal bonding and longitudinal shear adhesion properties of F-III and F-12 aramid fiber/epoxy interfaces were estimated by transverse fiber bundle tension (TFBT) test and 45° fiber bundle tension (45FBT) test, respectively. After the tensile tests, the micro failure mechanisms were investigated by observing the fracture surfaces of the fiber bundle samples using scanning electron microscope (SEM). The interfacial debonding was found coupled with fibrillation at the fiber surface. The different macro failure modes of TFBT and 45FBT samples were subsequently explained via finite element (FE) calculation. The applicability of the fiber bundle tests for the characterization of aramid fiber/matrix interfacial adhesion was eventually discussed.

在这项工作中，分别通过横向纤维束张力测试（TFBT）和45°纤维束张力测试（45FBT）来评估F-III和F-12芳纶纤维/环氧树脂界面的正常粘合和纵向剪切粘合性能。在拉伸试验之后，通过使用扫描电子显微镜（SEM）观察纤维束样品的断裂表面来研究微观破坏机理。发现界面剥离并在纤维表面发生原纤化。随后通过有限元（FE）计算来解释TFBT和45FBT样品的不同宏观破坏模式。最终讨论了纤维束测试对芳族聚酰胺纤维/基体界面粘附性表征的适用性。