This research work investigates the influence of hybrid particulate fillers, Mg–Al layered double hydroxide (LDH), and nanoclay (NC), on the mechanical properties and formability of glass laminate AA5052 epoxy composites (GLARE). The composite laminates were prepared by varying the weight percentage (i.e., 3, 4, and 5 wt%) of the hybrid fillers in the epoxy resin. The conventional hand layup technique was utilized for the fabrication of the laminates. The tensile test samples were prepared in different orientations with respect to the rolling direction (i.e., 0°, 45°, and 90°) to address their anisotropic nature. The flexural, impact, lap shear, and formability tests were conducted as per ASTM and IS standards. The Erichsen cupping test was performed to study the formability of the composite laminates. For each test, the results were compared with that of the laminates containing individual LDH filler, NC filler, and no filler material. The results showed that the composite laminate with 5 wt% of LDH + NC hybrid filler exhibited enhanced tensile properties, impact energy, and lap shear strength while the laminate of 4 wt% LDH + NC filler possessed better flexural properties. The formability of the composite laminates with hybrid LDH + NC fillers was observed to be lower than that of the laminates with individual filler materials and laminate without any filler. The variation observed in the test results was justified by investigating the failure mechanism of the composite laminates using a scanning electron microscope.

中文翻译：

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Mg-Al 层状双氢氧化物和纳米粘土混合填料对玻璃层压板 AA5052 增强环氧树脂复合材料力学行为和成型性的影响

本研究工作研究了混合颗粒填料、Mg-Al 层状双氢氧化物 (LDH) 和纳米粘土 (NC) 对玻璃层压板 AA5052 环氧复合材料 (GLARE) 的机械性能和成型性的影响。通过改变环氧树脂中混合填料的重量百分比（即，3、4和5wt%）制备复合层压板。传统的手糊技术用于制造层压板。相对于轧制方向（即，0°、45° 和 90°）以不同方向制备拉伸试验样品，以解决它们的各向异性性质。根据 ASTM 和 IS 标准进行弯曲、冲击、搭接剪切和成型性测试。进行 Erichsen 杯突试验以研究复合层压板的成型性。对于每次测试，将结果与含有单独 LDH 填料、NC 填料和不含填料材料的层压板的结果进行比较。结果表明，含有 5 wt% LDH + NC 混合填料的复合层压板表现出增强的拉伸性能、冲击能和搭接剪切强度，而含有 4 wt% LDH + NC 填料的层压板具有更好的弯曲性能。观察到具有混合 LDH + NC 填料的复合层压板的成型性低于具有单独填料材料的层压板和没有任何填料的层压板。通过使用扫描电子显微镜研究复合层压板的失效机制，测试结果中观察到的变化是合理的。结果表明，含有 5 wt% LDH + NC 混合填料的复合层压板表现出增强的拉伸性能、冲击能和搭接剪切强度，而含有 4 wt% LDH + NC 填料的层压板具有更好的弯曲性能。观察到具有混合 LDH + NC 填料的复合层压板的成型性低于具有单独填料材料的层压板和没有任何填料的层压板。通过使用扫描电子显微镜研究复合层压板的失效机制，测试结果中观察到的变化是合理的。结果表明，含有 5 wt% LDH + NC 混合填料的复合层压板表现出增强的拉伸性能、冲击能和搭接剪切强度，而含有 4 wt% LDH + NC 填料的层压板具有更好的弯曲性能。观察到具有混合 LDH + NC 填料的复合层压板的成型性低于具有单独填料材料的层压板和没有任何填料的层压板。通过使用扫描电子显微镜研究复合层压板的失效机制，测试结果中观察到的变化是合理的。观察到具有混合 LDH + NC 填料的复合层压板的成型性低于具有单独填料材料的层压板和没有任何填料的层压板。通过使用扫描电子显微镜研究复合层压板的失效机制，测试结果中观察到的变化是合理的。观察到具有混合 LDH + NC 填料的复合层压板的成型性低于具有单独填料材料的层压板和没有任何填料的层压板。通过使用扫描电子显微镜研究复合层压板的失效机制，测试结果中观察到的变化是合理的。