考虑到射弹和目标相互作用的可变形射弹穿透韧性金属靶板过程的数值模型

IF 5.1 2区 工程技术 Q1 ENGINEERING, MECHANICAL
Sen Cao, Jitang Fan
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引用次数: 0

摘要

射弹和目标在穿透过程中的相互作用是精确预测和安全设计的关键。然而,这种相互作用是瞬时的,并伴随着复杂的物理现象而变化,这给全景展示穿透过程带来了挑战。本研究开发了一种新的数值模型,可捕捉可变形弹丸撞击韧性靶板的穿透过程,同时考虑了弹丸和靶板的相互作用。本文探讨了物理机制,并相应地进行了理论分析的数学推导。其中涉及塑性应力波、接触应力、剪切穿孔和能量耗散等问题。研究了弹丸的变形和靶板的破坏,包括弹丸的颠覆变形、靶板的开坑性能和靶板的穿孔。该模型展示了弹丸和靶板的变形历史、速度演变、穿透阻力和剪切穿孔的时间。通过与平头弹丸穿透 Weldox 460E 钢靶板的实验数据[54]以及其他已开发的堵塞破坏模型[13]和塑性波模型[48]对 16 毫米和 20 毫米厚靶板两种情况的对比,建模结果显示了高精度的预测。本研究对穿透过程进行了全面计算和分析,揭示了冲击工程中的瞬态现象。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical model for penetration process of a deformable projectile into ductile metallic target plate considering the interaction of projectile and target

The interaction of projectile and target in a penetration process is key for precise prediction and safety design. However, this interaction is instantaneous and varying with complex physical phenomena, that induces a challenge of panoramically illustrating the penetration process. This work develops a new numerical model that can capture the penetration process of a deformable projectile impacting ductile target plate and meanwhile the interaction of projectile and target is considered. Here, physical mechanisms are explored and accordingly mathematical derivations for theoretical analysis are carried out. The issues of plastic stress wave, contact stress, shear perforation and energy dissipation are involved. Both the deformation of projectile and failure of target plate are addressed which include the upsetting deformation of projectile, pit-opening performance of target plate and perforation of target plate. This model presents the history of the deformation of projectile and target, velocity evolution, penetration resistance and shear perforation with timing. The modelling results show a high-precision prediction by comparing with experimental data of a flat-ended projectile penetrating Weldox 460E steel target plate [54] and other developed models of plugging failure model [13] and plastic wave model [48] for both cases of 16mm- and 20 mm-thickness target plates. This work offers the comprehensive calculation and analysis of penetration process and reveals the insights of the transient phenomena for impact engineering.

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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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