Numerical and experimental study on the open-hole tensile properties of angle-ply carbon/glass hybrid laminates based on thin-ply carbon fiber prepreg

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2025-08-21 DOI:10.1016/j.compstruct.2025.119577

Wenlong Lu , Haotian Yang , Hao Dong , Dingding Chen , Junfeng Hu

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Abstract

The angle-ply fiber-reinforced polymer (FRP) laminates and carbon/glass (C/G) hybrid laminates could exhibit nonlinear failure characteristics, providing an obvious warning signal before the failure of material, which is defined as pseudo-ductility. Moreover, in practical engineering applications, FRP structures often require an open hole to meet connection requirements, resulting in strength reduction of structures. In this study, four types of angle-ply C/G hybrid laminates, 0G0C, 15G15C, 45G45C, and 75G15C, were fabricated. Static tensile tests and finite element simulations were applied to research the influence of ply angle and open-hole on the pseudo-ductility of C/G hybrid laminates. The 0G0C laminate achieved a pseudo-ductile damage process through stable delamination around slits, with pseudo-ductile strains reaching 1.04 %. With the increased ply angle, the influence of slits on delamination was weakened. The introduction of hole results in tensile strength reductions of 51.8 %, 52.2 %, 48.7 %, and 31.6 % for the four structures, respectively. A multi-scale approach was applied to analyze the angle-ply laminates. The micro-scale model exhibited that the failure mode transitioned from fiber fracture to matrix damage with the increase of ply angle. The meso-scale model accurately described the damage of the angle-ply laminates, consistent with experimental observations.

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基于薄碳纤维预浸料的角层碳/玻璃杂化层合板开孔拉伸性能的数值与实验研究

角层纤维增强聚合物（FRP）复合材料和碳/玻璃（C/G）复合材料复合材料均表现出非线性破坏特征，在材料破坏前提供了明显的预警信号，并将其定义为伪延性。此外，在实际工程应用中，FRP结构往往需要开孔以满足连接要求，导致结构强度降低。本研究分别制备了0G0C、15G15C、45G45C和75G15C四种角层C/G杂化复合材料。采用静力拉伸试验和有限元模拟方法，研究了铺层角和开孔对C/G混杂层合板伪延性的影响。0G0C层合板通过在缝隙周围稳定分层实现了伪韧性损伤过程，伪韧性应变达到1.04%。随着铺层角的增大，狭缝对分层的影响减弱。孔洞的引入使四种结构的抗拉强度分别降低了51.8%、52.2%、48.7%和31.6%。采用多尺度方法对角度层合板进行了分析。微观尺度模型表明，随着铺层角的增大，其破坏模式由纤维断裂向基体损伤过渡。细观尺度模型准确地描述了角度层合板的损伤情况，与实验观察结果一致。

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.