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6061-T6铝合金圆柱壳穿孔行为的实验与数值研究

Experimental and Numerical Study on the Perforation Behavior of an Aluminum 6061-T6 Cylindrical Shell.

作者信息

Byun Seon-Woo, Joo Young-Jung, Lee Soo-Yong, Kim Sang-Woo

机构信息

Advanced Technology R&D Center, Design Analysis Team, Hanwha Aerospace, 6, Pangyo-ro 319beon-gil, Bundang-gu, Seongnam-si 13488, Gyeonggi-do, Republic of Korea.

School of Aerospace and Mechanical Engineering, Korea Aerospace University, 76 Hanggongdaehak-ro, Goyang-si 10540, Gyeonggi-do, Republic of Korea.

出版信息

Materials (Basel). 2023 Nov 6;16(21):7055. doi: 10.3390/ma16217055.

DOI:10.3390/ma16217055
PMID:37959652
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10650735/
Abstract

The modified Johnson-Cook (MJC) material model is widely used in simulation under high-velocity impact. There was a need to estimate a strain rate parameter for the application to the impact analysis, where the method typically used is the Split Hopkinson bar. However, this method had a limit to the experiment of strain rate. This study proposed to estimate the strain rate parameter of the MJC model based on the impact energy and obtained a parameter. The proposed method of strain rate parameter calculation uses strain parameters to estimate from the drop weight impact and high-velocity impact experiments. Then, the ballistic experiment and analysis were carried out with the target of the plate and cylindrical shape. These analysis results were then compared with those obtained from the experiment. The penetration velocities of plates could be predicted with an error of a maximum of approximately 3.7%. The penetration shape of the cylindrical target has a similar result shape according to impact velocity and had an error of approximately 6%.

摘要

修正的约翰逊-库克（MJC）材料模型在高速冲击模拟中被广泛应用。在应用于冲击分析时，需要估计一个应变率参数，通常使用的方法是分离式霍普金森杆。然而，该方法在应变率实验方面存在局限性。本研究提出基于冲击能量估计MJC模型的应变率参数并获得了一个参数。所提出的应变率参数计算方法利用应变参数从落锤冲击和高速冲击实验中进行估计。然后，以平板和圆柱形状的靶材为对象进行了弹道实验与分析。接着将这些分析结果与实验所得结果进行比较。平板的侵彻速度预测误差最大约为3.7%。圆柱靶的侵彻形状根据冲击速度具有相似的结果形状，误差约为6%。

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