Health & Environmental Research Online (HERO)


Print Feedback Export to File
8349637 
Journal Article 
斜波压缩下HMX晶体的弹塑性行为 
Chong, T; Mo, J; Zheng, X; Fu, H; Cai, J 
2021 
Explosion and Shock Waves 
41 
5 
Chinese 
The dynamics of HMX single crystals under ramp wave loading was studied experimentally and numerically. The ramp wave compression experiments of (010) and (011) crystal oriented HMX crystals within 15 GPa were carried out with the magnetic driven device CQ-4, which can provide a loading pressure with a rising time of 450−600 ns. The velocity curves of the interface between the HMX single crystal and the LiF single crystal were obtained with dual laser heterodyne velocimetry (DLHV). The experimental results show that there is an obvious elastic-plastic transition behavior in the loading section. The velocity waveforms have a downward trend in the elastic-plastic transition section, which is caused by the viscous effect of the HMX single crystal. The elastic limit of the HMX single crystal changes with the increase of the sample thickness. The Lagrange sound speed-particle velocity data and pressure-specific volume curves of (010) and (011) crystal oriented HMX crystals were obtained with the iterative Lagrange data processing method for dynamic impedance mismatch. The Lagrange sound speed-particle velocity relationships in the different crystal directions are different. The pressure-specific volume curve is close to isentropic experimental data by Sandia laboratory. The numerical simulation of the physical process of ramp wave compression of the HMX crystal was carried out with the viscoelastic plastic constitutive relation of Hobnemser-Prager and the third-order Birch-Murnaghan equation of state. The calculation results can well describe the physical process of the elastic-plastic transformation of HMX crystal. © 2021, Editorial Staff of EXPLOSION AND SHOCK WAVES. All right reserved. 
Elastic-plastic transition; Equation of state; HMX crystal; Ramp wave compression