In this work, the impact response of carbon fibre metal laminates (FMLs) was experimentally and numerically studied with an improved design of the fibre composite lay-up for optimal mechanical properties and damage resistance. Two different stacking sequences (Carall 3–3/2–0.5 and Carall 5–3/2–0.5) were designed and characterised. Damage at relatively low energy impact energies (≤30 J) was investigated using Ultrasonic C-scanning and X–ray Computed Tomography (X-RCT). A 3D finite element model was developed to simulate the impact induced damage in both metal and composite layers using Abaqus/Explicit. Cohesive zone elements were introduced to capture delamination occurring between carbon fibre/epoxy plies and debonding at the interfaces between aluminium and the composite layers. Carall 5–3/2–0.5 was found to absorb more energy elastically, which indicates better resistance to damage. A good agreement is obtained between the numerically predicted results and experimental measurements in terms of force and absorbed energy during impact where the damage modes such as delamination was well simulated when compared to non-destructive techniques (NDT).

在这项工作中，对碳纤维金属层压板（FML）的冲击响应进行了实验和数值研究，并对纤维复合材料叠层进行了改进设计，以获得最佳的机械性能和抗损伤性。设计并表征了两种不同的堆叠顺序（Carall 3–3 / 2–0.5和Carall 5–3 / 2–0.5）。使用超声波C扫描和X射线计算机断层扫描（X-RCT）研究了在较低能量冲击能量（≤30J）下的损伤。开发了一个3D有限元模型，以使用Abaqus / Explicit模拟金属和复合材料层中的冲击诱导损伤。引入内聚区元素以捕获碳纤维/环氧树脂层之间发生的分层以及铝与复合材料层之间的界面处的剥离。发现Carall 5–3 / 2–0.5可以弹性吸收更多能量，表示更好的抗损坏能力。在数值预测的结果和实验测量之间，在撞击过程中的力和吸收的能量方面获得了很好的一致性，与非破坏性技术（NDT）相比，可以很好地模拟诸如分层等破坏模式。