Numerical investigation of dynamic behavior of metal Pb driven by oblique shock waves

REN Guowu; ZHANG Chongyu; ZHANG Yajun; HONG Renkai; CHEN Yongtao

doi:10.11883/bzycj-2016-0177

Volume 38 Issue 2

Jan. 2018

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REN Guowu, ZHANG Chongyu, ZHANG Yajun, HONG Renkai, CHEN Yongtao. Numerical investigation of dynamic behavior of metal Pb driven by oblique shock waves[J]. Explosion And Shock Waves, 2018, 38(2): 397-403. doi: 10.11883/bzycj-2016-0177

Citation:

REN Guowu, ZHANG Chongyu, ZHANG Yajun, HONG Renkai, CHEN Yongtao. Numerical investigation of dynamic behavior of metal Pb driven by oblique shock waves[J]. Explosion And Shock Waves, 2018, 38(2): 397-403. doi: 10.11883/bzycj-2016-0177

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Numerical investigation of dynamic behavior of metal Pb driven by oblique shock waves

doi: 10.11883/bzycj-2016-0177

Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, 621999, Sichuan, China

Received Date: 2016-06-20
Rev Recd Date: 2017-04-07
Publish Date: 2018-03-25

Abstract

Abstract

Dynamic behaviors of metal materials subjected to intense shock loading is presently a focus in basic research and engineering application in the field of shock wave study. This work investigated dynamic behaviors within the metal Pb loaded by two oblique shock waves via Smooth Particle Hydro dynamic (SPH) method, with an emphasis on the influence of different initiation points on the dynamic behaviors in the collision zone. Utilizing the shock polar theory, we obtained the critical angle for an incident oblique shock wave varying with the Mach number, which indicated a transition from regular to Mach reflection. The comparison of the numerical data with the theoretical plot confirmed the interaction of two oblique shock waves, thus essentially revealing the Mach reflection and the formation of the Mach stem. As the distance of the initiation point from the Pb surface increases, so do both the incident pressure and the angle for an oblique shock wave, including also the generated Mach stem. Based on the free surface velocity profiles, we calculated the width of the Mach stem and the Mach angle, the results being in good agreement with the theoretical prediction.
- Pb,
- collide,
- Mach reflection,
- oblique shock wave

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References(12)

References

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