薄层增强混合碳纤维增强聚合物层合板的断裂机制研究,Polymer Composites

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薄层增强混合碳纤维增强聚合物层合板的断裂机制研究
Polymer Composites ( IF 4.8 ) Pub Date : 2022-12-12 , DOI: 10.1002/pc.27196
Farin Ramezani ₁ , Ricardo J. C. Carbas _{1,

2} , Eduardo A. S. Marques ₁ , Antonio M. Ferreira ₂ , Lucas F. M. da Silva ₂

Affiliation

在具有复合材料被粘物的粘合单搭接接头中产生分层的主要应力分量是横向拉伸应力。因此，以下研究调查了复合材料层合板（由薄层增强的参考层合板和混合层合板）在横向拉伸载荷下的行为。Texipreg HS 160T700 和 NTPT-TP415 分别用作常规碳纤维增强聚合物 (CFRP) 和薄层。使用不同数量的薄层，通过厚度应用，研究了混合复合材料层合板。制造的单向堆叠结构的层压板在横向拉伸载荷下进行了测试。执行数字图像相关以研究复合材料的平均剥离应变分布，并更好地理解与使用混合层压板相关的现象。实验结果表明，与参考的传统 CFRP 或薄层层压板相比，使用薄层创建的增强混合复合材料层压板具有更高的失效载荷。发现这是由于薄层的存在带来了更高的延展性。发现通过厚度分布恒定量的薄层可以增加层压板的横向强度，因为薄层层压板可以作为防止裂纹扩展的屏障。为每个配置研究了一个代表性的体积元素，因为这种数值方法带来了在微观尺度上研究所研究的配置的机会。发现这是由于薄层的存在带来了更高的延展性。发现通过厚度分布恒定量的薄层可以增加层压板的横向强度，因为薄层层压板可以作为防止裂纹扩展的屏障。为每个配置研究了一个代表性的体积元素，因为这种数值方法带来了在微观尺度上研究所研究的配置的机会。发现这是由于薄层的存在带来了更高的延展性。发现通过厚度分布恒定量的薄层可以增加层压板的横向强度，因为薄层层压板可以作为防止裂纹扩展的屏障。为每个配置研究了一个代表性的体积元素，因为这种数值方法带来了在微观尺度上研究所研究的配置的机会。

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A study of the fracture mechanisms of hybrid carbon fiber reinforced polymer laminates reinforced by thin-ply

The main stress component which creates delamination in bonded single lap joints with composite adherends is the transverse tensile stress. Therefore, the following study investigates the behavior of composite laminates (reference and hybrid laminates reinforced by thin-ply) under transverse tensile loading. Texipreg HS 160T700 and NTPT-TP415 were used as the conventional carbon fiber reinforced polymer (CFRP) and thin-ply respectively. Hybrid composite laminates were studied using different amounts of thin-ply, applied through the thickness. The manufactured laminates, of unidirectionally stacked construction, were tested under transverse tensile loading. Digital image correlation was performed to investigate the average peel strain distribution for the composite and to better understand the phenomena associated to the use of hybrid laminates. Experimental results show that the reinforced hybrid composite laminates, created using thin-plies, present higher failure load compared to the reference conventional CFRP or thin-ply laminates. This was found to be due to the higher ductility enabled by the presence of thin-plies. Distributing a constant amount of thin-ply through the thickness was found to increase the laminate transverse strength, as the thin-ply laminates act as a barrier against crack propagation. A representative volume element was studied for each configuration since this numerical method brings the opportunity to investigate the studied configurations in microscale.

更新日期：2022-12-12

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