摘要
描述了实现金属环动态拉伸的电磁膨胀环实验方法,改进了快速放电和短路开关两个实现自由膨胀的关键问题,为研究材料本构关系、动态断裂和破碎提供了一条简单而实用的加载途径。主回路电流由Rogowski线圈测量获得,金属环的膨胀速度由狭缝扫描相机测量得到,并由电动力学方程可计算出金属环中的流动应力、应变、应变率以及温升等动态力学参数。
The dynamic tension experimental technique of electromagnetically driven thin metal rings＇ expansion was described, and quick-discharge switch and cut-off switch were improved to achieve ring＇s free expansion. The approach is useful for studies on material constitutive relationship, dynamic fracture and fragmentation. The main circuit current was measured by Rogowski probe, and the expansion velocity was obtained from slit scanning camera＇s displacement measurement. The flow stress, strain, strain rate, expansion velocity and temperature rise of ring was obtained by electrodynamics analysis calculation.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2006年第6期481-485,共5页
Explosion and Shock Waves
基金
电磁加载下金属材料的动态破坏机理研究基金项目(FZ02003)
关键词
爆炸力学
电磁膨胀环
动态拉伸
金属环
ROGOWSKI线圈
狭缝扫描
mechanics of explosion
electromagnetically driven ring expansion
dynamic tension
metal ring
Rogowski probe
slit-scanning camera
