Structural design and crashworthiness analysis of axial cutting coupled radial extrusion tube

IF 4 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Journal of Constructional Steel Research Pub Date : 2024-10-16 DOI:10.1016/j.jcsr.2024.109079

Suchao Xie , Zinan Liu , Hao Wang , Kunkun Jing , Guandi He

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Abstract

In order to address the energy absorption (EA) issue caused by limited installation space, a circular tube EA structure with axial cutting coupled radial extrusion (ACCRE) deformation modes is proposed and constructed. The FE model of cutting and extrusion die, bottom plate, cross rib and circular tube was established. The accuracy of the FE model was verified by two repeated tests. Finally, the peak force was predicted by theoretical model. Under the influence of dies, the circular tube produces chips and grooves and exhibits multi-level EA characteristics, with specific EA of 43.38 kJ/kg and first and second order platform force of 107.53 kN and 515.22 kN. With a maximum error of only 6.78 %, the FE model and experimental data offer accurate simulations of deformation patterns, steady-state loads, and EA. The specific EA of the ACCRE tube is increased by 120.2 % and 223.7 %, respectively, when compared to the single deformation modes of cutting and extrusion. This finding indicates that the ACCRE deformation mode can adequately cause the tube to undergo plastic deformation, improve the material utilization rate to better EA effect.

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轴向切割耦合径向挤压管的结构设计和耐撞性分析

为了解决有限安装空间造成的能量吸收（EA）问题，提出并构建了一种具有轴向切割耦合径向挤压（ACCRE）变形模式的圆管 EA 结构。建立了切割挤压模具、底板、横肋和圆管的 FE 模型。通过两次重复试验验证了 FE 模型的准确性。最后，通过理论模型预测了峰值力。在模具的影响下，圆管产生切屑和沟槽，并表现出多级 EA 特性，比 EA 为 43.38 kJ/kg，一阶和二阶平台力分别为 107.53 kN 和 515.22 kN。FE 模型和实验数据的最大误差仅为 6.78%，可精确模拟变形模式、稳态载荷和 EA。与切割和挤压的单一变形模式相比，ACCRE 管的比 EA 分别增加了 120.2 % 和 223.7 %。这一结果表明，ACCRE 变形模式能充分使管材发生塑性变形，提高材料利用率，达到更好的 EA 效果。

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来源期刊

Journal of Constructional Steel Research 工程技术-工程：土木

CiteScore

7.90

自引率

19.50%

发文量

550

审稿时长

46 days

期刊介绍： The Journal of Constructional Steel Research provides an international forum for the presentation and discussion of the latest developments in structural steel research and their applications. It is aimed not only at researchers but also at those likely to be most affected by research results, i.e. designers and fabricators. Original papers of a high standard dealing with all aspects of steel research including theoretical and experimental research on elements, assemblages, connection and material properties are considered for publication.