In this experimental study, the low velocity impact behavior of aluminum-kevlar laminates (ARALL) was investigated. ARALL composites were prepared in two different configurations as aluminum-kevlar-aluminum (AKA) and kevlar-aluminum-kevlar (KAK). The aluminum alloy used in the preparation of the samples was supplied as 5754 series 2 mm thick plate. Kevlar fabrics were supplied in a weight of 200 gr/m² and in twill weave type. Laminated composites with kevlar twill fabrics were made through hand lay-up followed by compression molding process. [K]₄ composite laminates were obtained by curing kevlar/epoxy laminates under 100°C and 7 bar pressure for 180 min. Then samples of size 100×100 mm were cut from the plates with water jet. The cut specimens were bounded together with two-component adhesive. Impact test device Instron-dynatup 9250 HV was used for impact tests. An energy profil method (EPM), it expresses the impact energy and the corresponding absorbed energy. The increasing impact energy was performed on two configuration of ARALL composites until perforation occurs. Perforation threshold of AKA samples is approximately 70% higher than that of KAK samles.

中文翻译：

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Kevlar/环氧铝层压板的低速冲击响应

在这项实验研究中，研究了铝凯夫拉层压板 (ARALL) 的低速冲击行为。ARALL 复合材料制备成两种不同的配置，即铝-凯夫拉-铝 (AKA) 和凯夫拉-铝-凯夫拉 (KAK)。用于制备样品的铝合金以 5754 系列 2 mm 厚板的形式提供。Kevlar 织物以 200 gr/m ²的重量和斜纹组织形式提供。带有 Kevlar 斜纹织物的层压复合材料是通过手糊和压缩成型工艺制成的。[K] ₄通过在 100°C 和 7 bar 压力下固化 Kevlar/环氧树脂层压板 180 分钟获得复合层压板。然后用水射流从板上切割出尺寸为 100 × 100 mm 的样品。切割的样品用双组分粘合剂粘合在一起。冲击试验装置 Instron-dynatup 9250 HV 用于冲击试验。一种能量分布方法 (EPM)，它表示冲击能量和相应的吸收能量。对两种配置的 ARALL 复合材料进行增加的冲击能量，直到发生穿孔。AKA 样品的穿孔阈值比 KAK 样品的穿孔阈值高约 70%。