摘要
为了研究2024-T42铝合金平板的弹道毁伤特性,利用一级空气炮装置进行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。
2024-T42 aluminum plate was normally impacted by spherical projectile using gas gun setup to study 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.
作者
张宇
王彬文
刘小川
惠旭龙
葛宇静
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 StructuresImpact Dynamics ,Xi’an 710065)
出处
《强度与环境》
CSCD
2019年第3期27-33,共7页
Structure & Environment Engineering
基金
航空科学基金(20174123008)