三维编织复合材料帽形单加筋壁板弯曲性能研究

doi:10.19936/j.cnki.2096-8000.20251028.015

复合材料科学与工程 ›› 2025, Vol. 0 ›› Issue (10): 97-104.DOI: 10.19936/j.cnki.2096-8000.20251028.015

三维编织复合材料帽形单加筋壁板弯曲性能研究

罗惠^1,2, 李倩倩^1,2, 李炜^1,2,3*

1.东华大学纺织学院,上海 201620;
2.东华大学民用航空复合材料协同创新中心,上海 201620;
3.产业用纺织品教育部工程研究中心,上海 201620

收稿日期:2024-10-28 出版日期:2025-10-28 发布日期:2025-12-02
通讯作者: 李炜(1971—),女,博士,教授,博士生导师,主要从事纺织复合材料性能方面的研究,liwei@dhu.edu.cn。
作者简介:罗惠(2000—),女,硕士研究生,主要从事三维编织碳纤维复合材料方面的研究。

Study on the bending performance of three-dimensional braided composite hat-stiffened single-ribbed panels

LUO Hui^1,2, LI Qianqian^1,2, LI Wei^1,2,3*

1. College of Textiles, Donghua University, Shanghai 201620, China;
2. Civil Aviation Composites Collaborative Innovation Centre, Donghua University, Shanghai 201620, China;
3. Ministry of Education Engineering Research Centre for Technical Textiles, Shanghai 201620, China

Received:2024-10-28 Online:2025-10-28 Published:2025-12-02

摘要/Abstract

摘要： 采用三维编织技术制备蒙皮与长桁编织行数比例分别为3∶5, 4∶4, 5∶3, 6∶2的帽形单加筋结构预制体,再经真空辅助树脂传递模塑(Vacuum Assisted Resin Transfer Molding,VARTM)工艺固化成型。通过四点弯曲试验并结合三维数字图像相关(3D Digital Image Correlation,3D-DIC),分析蒙皮与长桁编织行数变化对三维编织复合材料帽形单加筋壁板弯曲性能及失效过程影响。结果表明,编织行数比例为4∶4的试样承载能力最强,编织行数比例为3∶5的试样抵抗弯曲变形的能力最好。在弯曲加载过程中,帽形单加筋壁板的腹板与凸缘连接处会发生应力集中出现裂纹,但对整体承载能力无明显影响,其承载能力降低主要是由蒙皮脆性断裂造成的。研究结果为三维编织复合材料帽形单加筋壁板结构设计提供了参考依据。

关键词: 三维编织复合材料, 加筋壁板, 帽形筋条, 四点弯曲, 三维数字图像相关

Abstract: Preforms of hat-stiffened single-ribbed structures with skin-to-stringer braiding row ratios of 3∶5, 4∶4, 5∶3, and 6∶2 were fabricated using three-dimensional (3D) braiding technology. It is then cured by the vacuum assisted resin transfer molding (VARTM) process. The influence of variations in the number of braiding rows between the skin and the stringer on the bending performance and failure process of 3D braided hat-stiffened single-ribbed panels is analyzed through four-point bending tests combined with three-dimensional digital image correlation (3D-DIC). The results indicate that the panel with a braiding row ratio of 4∶4 exhibits the highest load-bearing capacity, while the panel with a ratio of 3∶5 demonstrates the best resistance to bending deformation. During bending,stress concentration and cracking occur at the interface between the web and flange of the 3D braided hat-stiffened single-ribbed panel. The cracking at this junction has no significant impact on the overall load-bearing capacity,and the reduction in load-bearing capacity of the ribbed panel is primarily caused by brittle fracture of the skin. These findings provide a reference for the structural design of 3D braided hat-stiffened single-ribbed panels.

Key words: three-dimensional braided composites, stiffened panel, hat-shaped stiffener, four-point bending, 3D-DIC(three-dimensional digital image correlation

中图分类号:

TB332

罗惠, 李倩倩, 李炜. 三维编织复合材料帽形单加筋壁板弯曲性能研究[J]. 复合材料科学与工程, 2025, 0(10): 97-104.

LUO Hui, LI Qianqian, LI Wei. Study on the bending performance of three-dimensional braided composite hat-stiffened single-ribbed panels[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(10): 97-104.

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三维编织复合材料帽形单加筋壁板弯曲性能研究

Study on the bending performance of three-dimensional braided composite hat-stiffened single-ribbed panels

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