A numerical and experimental approach to blast protection with fluids, effect of impulse spreading

IF 5.1 2区 工程技术 Q1 ENGINEERING, MECHANICAL International Journal of Impact Engineering Pub Date : 2024-08-22 DOI:10.1016/j.ijimpeng.2024.105094
Tatiana Rigoulet , Ludovic Blanc , Federica Daghia , Peter Wriggers
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Abstract

In the face of rapidly evolving challenges, new protection techniques against blast waves generated by high explosive detonations must be identified. The protection of vehicle floors is particularly relevant, especially against improvised explosive devices (IED), as these are challenging to detect. In this paper, investigations on fluid-filled sacrificial claddings are presented. Classical sacrificial claddings aim at limiting the deflection of the target by dissipating the blast wave energy through the core plastic or brittle deformation. On the contrary, fluid-filled sacrificial claddings are systems which aim at limiting the deflection of the target by extracting energy from the system and modifying the load distribution on the target. A new experimental set-up, designed for this investigation, is presented. Based on pressure signals, high speed-imaging and numerical simulations on LS-DYNA, it is shown that the ability to extract energy from the system is directly linked to the freedom of displacement of the fluid. It is also shown that at the same time, higher fluid displacement and well-designed boundary conditions lead to higher impulse spreading on the target.

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用流体进行爆炸防护的数值和实验方法,脉冲扩散的影响
面对快速发展的挑战,必须确定新的防护技术,以抵御高能炸药爆炸产生的冲击波。车辆地板的保护尤其重要,特别是针对简易爆炸装置(IED)的保护,因为这些装置很难被探测到。本文介绍了对充液牺牲包层的研究。传统的牺牲型包层旨在通过核心的塑性或脆性变形消散爆炸波能量,从而限制目标的变形。与此相反,充液牺牲包壳系统旨在通过从系统中提取能量并改变目标上的载荷分布来限制目标的变形。本文介绍了专为此项研究设计的新实验装置。根据压力信号、高速成像和 LS-DYNA 数值模拟,可以看出从系统中提取能量的能力与流体的位移自由度直接相关。研究还表明,与此同时,较高的流体位移和精心设计的边界条件会导致目标上较高的脉冲扩散。
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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
期刊最新文献
Random phase field model for simulating mixed fracture modes in spatially variable rocks under impact loading Research on the evolution of state field and damage range of multiple source cloud explosions Effect of pre-shock on the expanding fracture behavior of 1045 steel cylindrical shell under internal explosive loading Editorial Board A comment on “Plasticity, ductile fracture and ballistic impact behavior of Ti-6Al-4V Alloy” by Wu et al. (2023), Int. J. Impact Eng. 174:104493
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