The energy absorption characteristics and structural optimization of titanium/UHMWPE fiber metal laminates under high-speed impact

IF 5.1 2区 工程技术 Q1 ENGINEERING, MECHANICAL International Journal of Impact Engineering Pub Date : 2024-09-02 DOI:10.1016/j.ijimpeng.2024.105097
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Abstract

Fiber-metal laminates (FMLs), known for their lightweight and high strength, are widely used in structural protection in the fields of shipbuilding, military, and aerospace. Experiments were conducted using 12.7 mm hard spherical projectiles at speeds ranging from 915.7 – 1290 6 m per second to study the high-speed impact on FMLs composed of titanium and Ultra-high Molecular Weight Polyethylene(UHMWPE). The primary failure modes of the fibers were tensile failure and compressive shear failure. With increasing impact velocity, the proportion of tensile failures in the fibers gradually decreased, transitioning to shear plug failure as the main failure mode, while the titanium alloy primarily experienced erosive perforation and petal-shaped tearing. At a speed of 1290 6 m/s, the titanium alloy began to exhibit significant adiabatic shear tearing in four directions. Further, a three-dimensional numerical model was established, which, through theoretical analysis and experimental validation, proved to be highly reliable. Using this theoretical model, a deeper analysis of the dynamic response and penetration mechanism of the structure was conducted, explaining the energy distribution mechanism and dynamic response mechanisms of various parts. Based on this model, improvements and optimizations were made to the laminar structure of the UHMWPE/titanium alloy FML. Placing metal at the back maximized energy absorption but led to more pronounced bulging.

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高速冲击下钛/超高分子量聚乙烯纤维金属层压板的能量吸收特性与结构优化
纤维金属层压板(FML)以轻质高强著称,被广泛应用于造船、军事和航空航天领域的结构保护。实验使用 12.7 毫米硬质球形弹丸,以每秒 915.7 - 1290 6 米的速度,研究了由钛和超高分子量聚乙烯(UHMWPE)组成的纤维金属层压板受到的高速冲击。纤维的主要破坏模式是拉伸破坏和压缩剪切破坏。随着冲击速度的增加,纤维中拉伸破坏的比例逐渐减少,过渡到剪切塞破坏为主要破坏模式,而钛合金主要经历侵蚀穿孔和花瓣状撕裂。在速度为 1290 6 m/s 时,钛合金开始在四个方向上出现明显的绝热剪切撕裂。此外,还建立了一个三维数值模型,通过理论分析和实验验证,证明该模型非常可靠。利用该理论模型,对结构的动态响应和穿透机理进行了深入分析,解释了各部分的能量分布机理和动态响应机理。在此基础上,对超高分子量聚乙烯/钛合金 FML 的层状结构进行了改进和优化。在背面放置金属可最大限度地吸收能量,但会导致更明显的隆起。
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来源期刊
International Journal of Impact Engineering
International Journal of Impact Engineering 工程技术-工程:机械
CiteScore
8.70
自引率
13.70%
发文量
241
审稿时长
52 days
期刊介绍: The International Journal of Impact Engineering, established in 1983 publishes original research findings related to the response of structures, components and materials subjected to impact, blast and high-rate loading. Areas relevant to the journal encompass the following general topics and those associated with them: -Behaviour and failure of structures and materials under impact and blast loading -Systems for protection and absorption of impact and blast loading -Terminal ballistics -Dynamic behaviour and failure of materials including plasticity and fracture -Stress waves -Structural crashworthiness -High-rate mechanical and forming processes -Impact, blast and high-rate loading/measurement techniques and their applications
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