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采用薄铺层对厚度方向渐变碳纤维增强复合材料层合板进行横向拉伸载荷作用下的研究。

Study of CFRP Laminate Gradually Modified throughout the Thickness Using Thin Ply under Transvers Tensile Loading.

作者信息

Malekinejad Hossein, Ramezani Farin, Carbas Ricardo J C, Marques Eduardo A S, da Silva Lucas F M

机构信息

Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial (INEGI), Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.

Departamento de Engenharia Mecânica, Faculdade de Engenharia (FEUP), Universidade Do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.

出版信息

Materials (Basel). 2024 May 16;17(10):2388. doi: 10.3390/ma17102388.

DOI:10.3390/ma17102388
PMID:38793454
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11123032/
Abstract

The use of thin-ply composite materials has rapidly increased due to their tailorable mechanical properties and design flexibility. Considering an adhesively bonded composite joint, peel stress stands out as a key contributor leading to failure among other primary stress factors. Therefore, the reinforcement of carbon fiber-reinforced polymer (CFRP) laminates throughout the thickness could be considered as an approach to improve the joint strength. Using thin plies locally between the conventional CFRP layers in a laminate can enhance the strength, as the sudden change in stiffness means that the load transfer is not monotonous. Consequently, the following study examined the effect of altering thin plies gradually throughout the thickness on the behaviour of the CFRP laminates when subjected to transverse tensile loading. To achieve this goal, the CFRP laminates were gradually modified by using different commercially accessible prepreg thin plies, leading to an improved overall structural performance by reducing stress concentrations. Besides conducting an experimental study, a numerical assessment was also carried out utilizing Abaqus software with a Representative Volume Element (RVE) at the micro scale. The comparison of reference configurations, which involved various thin plies with different thicknesses and traditional CFRP laminates, with the suggested gradual configuration, demonstrated a notable enhancement in both strength and material cost. Furthermore, the proposed RVE model showed promising capability in accurately forecasting the strength of fabricated laminates.

摘要

由于其可定制的机械性能和设计灵活性，薄铺层复合材料的使用迅速增加。考虑到一个胶接复合材料接头，在其他主要应力因素中，剥离应力是导致失效的关键因素。因此，在整个厚度方向上增强碳纤维增强聚合物（CFRP）层压板可被视为提高接头强度的一种方法。在层压板的传统CFRP层之间局部使用薄铺层可以提高强度，因为刚度的突然变化意味着载荷传递不是单调的。因此，下面的研究考察了在整个厚度方向上逐渐改变薄铺层对CFRP层压板在横向拉伸载荷作用下行为的影响。为了实现这一目标，通过使用不同的市售预浸薄铺层对CFRP层压板进行逐步改性，通过降低应力集中提高了整体结构性能。除了进行实验研究外，还利用Abaqus软件在微观尺度上采用代表性体积单元（RVE）进行了数值评估。将涉及不同厚度的各种薄铺层和传统CFRP层压板的参考构型与建议的渐变构型进行比较，结果表明在强度和材料成本方面都有显著提高。此外，所提出的RVE模型在准确预测制造层压板的强度方面显示出有前景的能力。

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