一维快速拉伸下无氧铜的动态断裂与破碎

The dynamic fracture and fragmentation of OFHC Cu under 1-D fast tension

1.
Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China;
2.
Institute of Structural Mechanics, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China

摘要: 利用电磁膨胀环技术对无氧铜环进行了不同加载电压下的动态拉伸实验。对无氧铜在破碎前出现塑性失稳多重颈缩进行了初步分析，利用能量平衡的破碎理论给出了无氧铜环的破碎分布。三维数值模拟结果表明，颈缩区温升比非颈缩区高，且多重颈缩在环周上的分布服从泊松分布。
- 固体力学 /
- 动态断裂与破碎 /
- 电磁膨胀环 /
- 无氧铜 /
- 多重颈缩 /
- 数值模拟
Abstract: The dynamic tension experiments of OFHC Cu rings at different voltages were carried out by electromagnetically driven expansion technique. The plastic instability, i.e. multiple necking fracture before the fragmentation was fundamentally analyzed, and the fragments distribution was obtained from the energy balance theory. The 3-D numerical simulation shows that the temperature rise of necking region is higher than that of no-necking region. The multiple necking fracture distribution on the circumference yields to random Poisson distribution.
- solid mechanics /
- dynamic fracture and fragmentation /
- electromagnetically driven ring expansion /
- OFHC Cu /
- multiple necking fracture /
- numerical simulation