921A钢纯剪切帽状试件在SHPB实验中的动态变形

Dynamic deformations of 921A steel pure shear hat-shaped specimen in SHPB tests

1.
Institute of Structural Mechanics,China Academy of Engineering Physics,Mianyang 621900,Sichuan,China

摘要: 应用ANSYS/LS-DYNA软件,开展了一系列基于921A钢纯剪切帽状试件的SHPB数值模拟.结合SHPB系统应力波理论,研究不同加载速率v0(或应力脉冲I(t))下,特别是高应变率(约106 s-1)下的压杆轴向应变波形以及相应的试件动态变形特性,并对高速撞击下压杆中应变波形的适用性作了相关讨论.
- 爆炸力学 /
- 动态变形 /
- SHPB /
- 921A钢 /
- 纯剪切帽状试件
Abstract: A series of numerical simulations of SHPB test using 921A steel pure shear hat-shaped specimens are conducted with ANSYS/LS-DYNA and validated by the SHPB tests in the present paper. Integrated with the theory of stress wave in a SHPB system,the wave propagation in the bars and the dynamic deformations of the specimen under different loading rate (or stress pulse ) are analyzed,and typical wave shapes are identified for different loading rates. Numerical test of SHPB under ultrahigh strain rate are specially conducted,which is unable to be done realistically. The different deformation and failure of the hat-shaped specimens under different loading rate are distinguished,and the applicability of strain waves in the bars under ultrahigh loading rate is also discussed.
- mechanics of explosion /
- dynamic deformation /
- SHPB /
- 921A steel /
- pure shear hat-shaped specimen

1.	杨璞，李继承，陈建良，张斌，何丽灵，陈刚. 撞击姿态对构型弹体非正侵彻多层间隔钢靶弹道特性的影响规律. 爆炸与冲击. 2023(09): 123-139 . 本站查看
2.	葛超，曲卓君，王晋，胡蝶，王海福. 氟聚物基活性材料动态压剪实验研究. 兵工学报. 2022(08): 1816-1822 . 百度学术
3.	吴海军，王可慧，李明，段建，周刚，张庆明. 船用921A钢高温、高应变率下动态本构模型研究. 振动与冲击. 2022(20): 46-53 . 百度学术
4.	金婷，杨平. 高锰钢帽型样品在高速冲击下的剪切行为. 爆炸与冲击. 2017(01): 150-156 . 本站查看
5.	柴传国，冯雪磊，武海军，郭超，张爽，黄风雷. AerMet100钢动态剪切性能数值仿真研究. 北京理工大学学报. 2014(12): 1223-1228 . 百度学术
6.	刘先光，林贤坤，汪铁丰，汤淑芳. 易碎弹复合材料动态特性数值研究. 广西科技大学学报. 2014(02): 68-73 . 百度学术
7.	李继承，陈小伟，陈刚. 921A钢纯剪切帽状试件绝热剪切变形的数值模拟. 爆炸与冲击. 2010(04): 361-369 . 本站查看