2024-T42铝板抗球形钢弹侵彻特性研究

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2019年6月
强度与环境Jun.2019463STRUCTURE &ENVIRONMENT ENGINEERING Vol.46No.3
收稿日期:2018-11-09;修回日期:2019-05-20
基金项目:航空科学基金(20174123008)
作者简介:张宇(1994-),男,硕士生,研究方向:冲击动力学;(710065)陕西省西安市86号信箱.2024-T42铝板抗球形钢弹侵彻特性研究过滤器球阀
张宇王彬文刘小川惠旭龙葛宇静
(中国飞机强度研究所,结构撞击动力学航空科技重点实验室,陕西西安710065)
摘要:为了研究2024-T42铝合金平板的弹道毁伤特性,利用一级装置进行25.4mm 球形钢弹垂直撞
击2024-T42铝合金平板实验,得到铝板在钢弹侵彻下的损伤特性和弹道极限速度,之后基于LS-DYNA 有限元软件对钢弹撞击过程进行仿真分析,并详细分析了钢弹撞击过程中铝板的损伤和变形。实验和仿
蜂窝纸芯真结果表明:5mm 厚2024-T42铝合金平板在直径25.4mm 球形钢弹撞击作用下的弹道极限速度为151.7m/s ;钢弹侵彻过程中铝板发生局部剪切冲塞破坏和开裂损伤;钢弹初速度大于弹道极限速度,钢弹动能损失基本不变,钢弹初速度小于弹道极限速度,钢弹动能损失随初速度减小而减少。
关键词:侵彻力学;2024-T42铝板;弹道极限速度;损伤特性;LS-DYNA
中图分类号:O381文献标识码:A 文章编号:1006-3919(2019)03-0027-07
DOI:10.19447/jki.11-1773/v.2019.03.005
The Ballistic Performance of 2024-T42Aluminum Plate Subjected to
化纤丝>低温脱硝催化剂
Impact by Spherical Projectile
ZHANG Yu WANG Bin-wen LIU Xiao-chuan XI Xu-long GE Yu-jing
(Aircraft Strength Research Institute of China,Aviation Key Laboratory of Science and Technology on Structures
Impact Dynamics ,Xi’an 710065)
Abstract :2024-T42aluminum plate was normally impacted by spherical projectile using gas gun setup to study
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the ballistic damage characteristics of the aluminum plate.The impact failure performance and ballistic limit velocity were obtained.Then the impact process of spherical projectile has been analyzed based on LS-DYNA finite element software.The damage and deformation of aluminum plates during the impact of projectile have been deeply analyzed.The result indicated that the ballistic limit velocity of the 5mm aluminum plate was 151.7m/s under the impact of spherical projectile.And the local shear bulging and cracking damage occurred during the penetration process of the spherical projectile.When the initial velocity of projectile is greater than the ballistic limit velocity,the loss of kinetic energy of projectile is almost constant.On the contrary,the loss of kinetic energy decreases with the decrease of initial velocity.
Key words :Mechanics of penetration;2024-T42aluminum plate;ballistic limit velocity;failure performance;
LS-DYNA
0引言
飞机作为高价值作战目标,在战场环境下会成
蛭石板为被重点打击的对象,会遭遇射弹、导弹碎片等高
能离散元的撞击。因此,为提高飞机的战时生存力,
需对飞机结构的损伤特性进行研究。郝鹏等[1]利用实验系统,以靶板分层和板间间隙作为变量,研究了2A12铝合金平板在卵形弹丸撞击下的抗冲击性能,发现单层板的弹道极限高于双层板的弹道极限,且接触式双层板弹道极限速度大于间隙式双层板弹道极限速度。余庆波等[2]基于

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