Dalfi Hussein, Al-Obaidi Anwer J, Razaq Hussein
Department of Mechanical Engineering, University of Wasit, Wasit, Iraq.
Sci Prog. 2021 Apr-Jun;104(2):368504211023285. doi: 10.1177/00368504211023285.
Recently, high tensile fibres composite laminates (i.e. glass composite laminates) have been widely used in the civil and military applications due to their superior properties such as lightweight, fatigue and corrosion resistance compared to metals. Nevertheless, their brittle fracture behaviour is a real downside for many sectors. In the present study, the impact of the hybridisation of Kevlar woven layers with glass woven layers on the reducing the strain failure problem in pure glass woven laminates is investigated. In this work, multi-layers Kevlar-glass with different stacking sequences have been used to prepare the hybrid composite laminates using vacuum-assisted resin moulding method. The influence of the layers hybridisation on the mechanical performance of composites laminates was investigated using tensile strength tests. Furthermore, finite element analysis is performed to analyse the mechanical response of the hybrid composite laminates using Abaqus software. The elastic constants of woven fabric layers in the numerical study were predicted through geometric model based on the textile geometry and analytical method in order to assert accuracy of the predicted elastic constants. The experimental results showed that the hybrid composite laminates tend to fail more slowly than glass woven laminates, which illustrates low strain to failure. In the theoretical part of the study, it was found that the proposal model can be useful to capture the mechanical behaviour and the damage failure modes of hybrid laminates. Thus, the catastrophic failure can be avoided in these laminates.
近年来，高抗拉纤维复合层压板（即玻璃复合层压板）因其与金属相比具有轻质、抗疲劳和耐腐蚀等优越性能，已在民用和军事应用中得到广泛应用。然而，它们的脆性断裂行为对许多领域来说确实是一个不利因素。在本研究中，研究了芳纶编织层与玻璃编织层的混杂对减少纯玻璃编织层压板应变失效问题的影响。在这项工作中，采用不同堆叠顺序的多层芳纶 - 玻璃，通过真空辅助树脂成型法制备混杂复合层压板。使用拉伸强度试验研究了层间混杂对复合层压板力学性能的影响。此外，使用Abaqus软件进行有限元分析，以分析混杂复合层压板的力学响应。在数值研究中，通过基于织物几何形状的几何模型和解析方法预测编织织物层的弹性常数，以确定预测弹性常数的准确性。实验结果表明，混杂复合层压板比玻璃编织层压板失效更慢，这表明其失效应变较低。在研究的理论部分，发现所提出的模型有助于捕捉混杂层压板的力学行为和损伤失效模式。因此，可以避免这些层压板发生灾难性失效。
