Analytical modeling for four-point asymmetric end-notched flexure delamination test of composite laminates considering interlaminar friction

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING Composites Part A: Applied Science and Manufacturing Pub Date : 2025-06-01 Epub Date: 2025-02-25 DOI:10.1016/j.compositesa.2025.108824

Kaixin Xia , Fengrui Liu , Yu Gong , Xinxin Qi , Linjuan Wang , Libin Zhao , Ning Hu

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Abstract

The four-point asymmetric end-notched flexure (4AENF) test under shear loading often involves a mode I component, making it a representative mixed-mode I/II delamination problem. The 4AENF configuration reflects the general delamination behavior in defective laminates, emphasizing the need to characterize interlaminar fracture toughness. Despite its importance, research on 4AENF is limited, and existing models overlook interlaminar friction. This study develops a theoretical model based on Timoshenko beam theory and a two-point friction assumption, enabling analytical calculation of total strain energy release rate (SERR) for any 4AENF configuration, explicitly considering interlaminar friction. Experimental tests and finite element method (FEM) analyses validate the model, using unidirectional (UD) symmetric, UD asymmetric, and multidirectional (MD) asymmetric laminates. Theoretical predictions, experimental results, and FEM analyses are compared, confirming the model’s applicability and highlighting the effects of interlaminar friction.

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考虑层间摩擦的复合材料层合板四点不对称端缺口挠曲分层试验分析建模

剪切荷载作用下的四点非对称端缺口弯曲（4AENF）试验通常涉及I型构件，是典型的I/II型混合分层问题。4AENF结构反映了缺陷层压板的一般分层行为，强调了表征层间断裂韧性的必要性。尽管它很重要，但对4AENF的研究有限，现有模型忽略了层间摩擦。本研究建立了基于Timoshenko梁理论和两点摩擦假设的理论模型，在明确考虑层间摩擦的情况下，能够解析计算任意4AENF构型的总应变能释放率（SERR）。实验测试和有限元方法（FEM）分析验证了该模型，使用单向（UD）对称，UD非对称和多向（MD）非对称层压板。比较了理论预测、实验结果和有限元分析结果，证实了模型的适用性，并强调了层间摩擦的影响。

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.