Mechanical response and damage mechanism of carbon/Kevlar hybrid braiding composite laminates under quasi-static indentation and low-velocity impact loading

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-04-11 DOI:10.1016/j.tws.2025.113291

Mingling Wang , Lin Shi , Zhongxiang Pan , Zhenyu Wu

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引用次数: 0

Abstract

The study explains the distinctions in the response and damage evolution of hybrid structures subjected to quasi-static indentation (QSI) and low-velocity impact (LVI) loading, and the toughening mechanism of Kevlar in enhancing the impact resistance of Carbon Fiber Reinforced Polymer (CFRP). It offers insights for the design of hybrid composites under QSI and LVI loading. The analysis encompasses an investigation of the discrepancies in energy absorption, damage area, and damage form for hybrid laminates with varying Kevlar hybrid ratios and interlayer sequences. Furthermore, the finite element models (FEM) and periodic indentation test were employed to elucidate the damage mechanisms of laminates under loading process. It is proposed that energy absorption can be employed as a reasonable indicator for the comparison of static and dynamic loading responses. As the ratio of toughness to Kevlar hybrid increases, the static energy absorption of hybrid laminates declines gradually, whereas the dynamic energy absorption rises. Compared to static loading, the damage of fibres and yarns is more pronounced under dynamic loading. The extent of impact damage in hybrid specimens is contingent upon the number and distribution of Kevlar layers. In static loading, damage propagated from the loading surface to the non-loading surface, ultimately leading to the failure of structure. In contrast, under dynamic loading, damage initiated on the surface not subjected to loading and propagated towards the loaded surface, ultimately leading to a similar outcome.

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准静态压痕和低速冲击载荷下碳/凯夫拉混杂编织复合材料层合板的力学响应及损伤机理

分析了杂化结构在准静态压痕（QSI）和低速冲击（LVI）载荷作用下的响应和损伤演化特征，探讨了芳纶纤维（Kevlar）增强碳纤维增强聚合物（CFRP）抗冲击性能的增韧机理。为复合材料在QSI和LVI载荷下的设计提供了新的思路。分析了不同凯夫拉混合比率和层间序列的混合层合板在能量吸收、损伤面积和损伤形式方面的差异。此外，采用有限元模型和周期性压痕试验对层合板在加载过程中的损伤机理进行了分析。提出能量吸收可以作为比较静、动荷载响应的合理指标。随着复合材料韧性比的增加，复合材料的静态吸能逐渐下降，而动态吸能逐渐上升。与静态载荷相比，动态载荷对纤维和纱线的破坏更为明显。混杂试样的冲击损伤程度取决于凯夫拉层的数量和分布。在静力加载中，损伤从加载面向非加载面传播，最终导致结构破坏。相比之下，在动加载下，损伤始于未受加载的表面，并向加载表面传播，最终导致类似的结果。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.