Low-velocity impact and quasi-static post-impact compression analysis of woven structural composites for automotive: Influence of fibre types and architectural structures

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Composite Structures Pub Date : 2024-10-28 DOI:10.1016/j.compstruct.2024.118676

Sandeep Olhan , Bindu Antil , B.K. Behera

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Abstract

This paper studied the effect of different fibres and their architectures on the low-velocity impact (LVI) and quasi-static compression after impact (CAI) characteristics of textile fibre-based structural composite materials (TFSCM) manufactured using the vacuum-assisted resin transfer molding (VARTM) method. All specimens were tested at three distinct impact energy levels: 20 J, 30 J, and 40 J. Subsequently, optical microscopy, field emission scanning electron microscope (FESEM), and 3D X-ray micro-computed tomography (µ-CT) techniques were utilized to examine and analyze the internal and external damage morphologies, failure mechanisms, and damage distribution within the structural composites. The experimental findings revealed that the basalt epoxy-based three-dimensional (3D) woven fabric-reinforced composites had superior energy absorption and deformation resistance than the glass and sisal-based unidirectional (UD) and bidirectional (2D) composites across all impact energy levels. Furthermore, µ-CT analysis showed that specimens impacted at 40 J experienced a 128.41 % and 154.36 % increase in damage volume compared to those impacted at 30 J and 20 J, leading to complete perforation damage and z-yarn bending and breakage without any delamination at the impact site. More importantly, composites reinforced with UD preforms impacted at 10 J exhibited higher CAI strength compared to both 2D and 3D composites.

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汽车用编织结构复合材料的低速冲击和冲击后准静态压缩分析：纤维类型和建筑结构的影响

本文研究了不同纤维及其结构对使用真空辅助树脂传递成型（VARTM）方法制造的纺织纤维基结构复合材料（TFSCM）的低速冲击（LVI）和冲击后准静态压缩（CAI）特性的影响。随后，利用光学显微镜、场发射扫描电子显微镜（FESEM）和三维 X 射线显微计算机断层扫描（µ-CT）技术检查和分析了结构复合材料的内部和外部损伤形态、失效机制和损伤分布。实验结果表明，基于玄武岩环氧树脂的三维（3D）编织物增强复合材料在所有冲击能量水平下的能量吸收和抗变形能力都优于基于玻璃和剑麻的单向（UD）和双向（2D）复合材料。此外，µ-CT 分析表明，与受到 30 J 和 20 J 冲击的试样相比，受到 40 J 冲击的试样的损坏体积分别增加了 128.41% 和 154.36%，导致试样完全穿孔损坏、z-纱弯曲和断裂，而冲击部位没有任何分层。更重要的是，与二维和三维复合材料相比，用 UD 预制件增强的复合材料在 10 J 的冲击下表现出更高的 CAI 强度。

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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.