Velumayil Ramesh, Palanivel Anand
Department of Mechanical Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai 600062, TN, India.
Polymers (Basel). 2022 Mar 29;14(7):1382. doi: 10.3390/polym14071382.
The present work investigates the fabrication of Kevlar/epoxy and basalt/epoxy and Kevlar/basalt/epoxy hybrid composite laminates and compares their mechanical properties. Mechanical characterization tests, including tension, flexural, impact and hardness tests, as per ASTM standards, were conducted on coupons cut out from the fabricated composite panels. A hand layup fabrication technique was used to fabricate composite panels with seven layers in them. Eight such laminates, with two containing pure Kevlar/epoxy and basalt/epoxy and the remaining ones containing Kevlar/basalt, were stacked in different sequences and impregnated in an epoxy matrix to provide a hybrid configuration. The microscopic examination of the fabricated laminates revealed that there was good bonding between the reinforcements and matrix material. Out of the eight composite panels including the hybrids, the ones with the pure basalt/epoxy exhibited more tensile and flexural strength than its Kevlar/epoxy counterpart due to its higher density value. The tensile and flexural strength of the hybrid laminates (i.e., combinations of basalt/Kevlar/epoxy) showed values in between pure basalt/epoxy and Kevlar/epoxy laminates in general. A similar trend was observed in terms of hardness and impact strength for the fabricated composite laminates.
本研究探讨了芳纶/环氧树脂、玄武岩/环氧树脂以及芳纶/玄武岩/环氧树脂混杂复合材料层压板的制造工艺，并比较了它们的机械性能。根据ASTM标准，对从制造的复合板上切割下来的试样进行了包括拉伸、弯曲、冲击和硬度测试在内的机械性能表征试验。采用手工铺层制造技术制造了含有七层的复合板。将八个这样的层压板（其中两个包含纯芳纶/环氧树脂和玄武岩/环氧树脂，其余的包含芳纶/玄武岩）以不同顺序堆叠，并浸渍在环氧树脂基体中，以提供一种混杂结构。对制造的层压板进行微观检查发现，增强材料与基体材料之间有良好的粘结。在包括混杂材料在内的八个复合板中，由于其较高的密度值，纯玄武岩/环氧树脂复合板的拉伸强度和弯曲强度高于其芳纶/环氧树脂对应物。一般来说，混杂层压板（即玄武岩/芳纶/环氧树脂的组合）的拉伸强度和弯曲强度值介于纯玄武岩/环氧树脂层压板和芳纶/环氧树脂层压板之间。对于制造的复合层压板，在硬度和冲击强度方面也观察到了类似的趋势。
