Impact resistance of metallic sandwich structures with hard-soft core

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2026-05-01 Epub Date: 2026-02-11 DOI:10.1016/j.tws.2026.114660

Wei Huang , Zhijie Duan , Zhao Li , Peng Wang , Shiming Zu , Jiayi Liu

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引用次数: 0

Abstract

The sandwich structure with hard metal frame and energy absorbing foam core (SMF) is of significance in the integration of lightweight and impact-resistant performance. By incorporating three foam materials, the synergistic mechanism between steel frameworks and varying soft foam cores are revealed in this work. Based on the large-mass impact test, a concurrent numerical simulation is conducted to analyze the impact resistance and energy absorption mechanisms of SMF in terms of transverse deflection, acceleration response, energy absorption, and failure modes. The results demonstrate that the hard-soft core design achieves a synergistic effect: while the steel framework governs the primary load-bearing capacity and global structural integrity, the soft foam cores significantly enhance energy dissipation through controlled compression and densification. Although with the lowest energy absorption efficiency, the SMF with high-density foam exhibits superior impact performance by suppressing front facesheet tearing and minimizing interface debonding at low impact velocity. The low-density foam cores achieve superior specific energy absorption to the high-density one, which is up to 5 times difference as it is subjected to impact velocity of 11.5 m/s. This work establishes that optimized sandwich with hard-soft core provides an effective strategy for developing advanced lightweight protective structures with tunable impact resistance.

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硬-软芯金属夹层结构的抗冲击性能

硬金属框架和吸能泡沫芯（SMF）夹层结构在轻量化和抗冲击性能的结合中具有重要意义。通过结合三种泡沫材料，揭示了钢框架与不同软泡沫芯之间的协同作用机制。在大质量冲击试验的基础上，从横向挠度、加速度响应、能量吸收和破坏模式等方面对SMF的抗冲击和吸能机理进行了并行数值模拟分析。结果表明，硬-软核设计实现了协同效应：钢框架控制初级承载能力和整体结构完整性，软泡沫核通过控制压缩和致密化显著增强耗能。虽然高密度泡沫材料的吸能效率最低，但在低冲击速度下，高密度泡沫材料通过抑制前面板撕裂和最小化界面剥离，表现出优异的冲击性能。在11.5 m/s的冲击速度下，低密度泡沫芯的比能吸收优于高密度泡沫芯，比能吸收差达5倍。研究表明，优化的硬-软芯夹层结构为开发具有可调抗冲击性能的先进轻质防护结构提供了有效的策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.