Dynamic tensile fracture and the decay of elastic precursor wave in shocked pure vanadium

LI Xuemei; YU Yuying; HU Changming; ZHANG Zugen; PENG Jianxiang; WANG Wei

doi:10.11883/bzycj-2018-0037

Volume 39 Issue 1

Oct. 2018

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LI Xuemei, YU Yuying, HU Changming, ZHANG Zugen, PENG Jianxiang, WANG Wei. Dynamic tensile fracture and the decay of elastic precursor wave in shocked pure vanadium[J]. Explosion And Shock Waves, 2019, 39(1): 013101. doi: 10.11883/bzycj-2018-0037

Citation:

LI Xuemei, YU Yuying, HU Changming, ZHANG Zugen, PENG Jianxiang, WANG Wei. Dynamic tensile fracture and the decay of elastic precursor wave in shocked pure vanadium[J]. Explosion And Shock Waves, 2019, 39(1): 013101. doi: 10.11883/bzycj-2018-0037

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Dynamic tensile fracture and the decay of elastic precursor wave in shocked pure vanadium

doi: 10.11883/bzycj-2018-0037

Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

Received Date: 2018-01-29
Rev Recd Date: 2018-11-14
Publish Date: 2019-01-05

Abstract

Abstract

By using plate impact and velocity interferometry, the dynamic tensile fracture (spall) of shocked pure vanadium was studied in the pressure range of 5.2-9.0 GPa, where the average tensile strain rate was in the range of 0.47×10⁵-1.19×10⁵ s^-1. All the vanadium samples used here were made by the hot isostatic pressing (HIP) method. Our results show that the HIP vanadium has a higher spall strength than those given in literatures, which lies in the range of 4.0-5.3 GPa, and increases with both the shock pressure and tensile strain rate. The higher spall strength of the HIP vanadium can be ascribed to the higher purity and fewer initial defects in material than those made by the remelting method. Additionally, the analysis on elastic precursor wave in vanadium indicates a power decay of Hugoniot elastic limit (σ_HEL) with the dimensionless thickness of the sample (h_s/h₀), where h₀ is a unit length. The coefficient and exponent of the power function best fitting the experimental data are 3.246 and -0.386, respectively, when the vanadium sample's thickness h_s is no greater than 6 mm.
- pure vanadium,
- spall strength,
- decay of elastic precursor,
- hot isostatic pressing,
- tensile fracture

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References(21)

References

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