Molecular Dynamics Simulation Study on Spallation Failure of [100] Single Crystal Aluminum under Different Waveform Loadings

YANG Xiangyang; WU Dun; ZHU Youlin; LI Junguo; ZHANG Ruizhi; ZHANG Jian; LUO Guoqiang

doi:10.11858/gywlxb.20240786

Volume 38 Issue 3

Jun 2024

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Chinese Journal of High Pressure Physics > 2024 > 38(3): 030106.

YANG Xiangyang, WU Dun, ZHU Youlin, LI Junguo, ZHANG Ruizhi, ZHANG Jian, LUO Guoqiang. Molecular Dynamics Simulation Study on Spallation Failure of [100] Single Crystal Aluminum under Different Waveform Loadings[J]. Chinese Journal of High Pressure Physics, 2024, 38(3): 030106. doi: 10.11858/gywlxb.20240786

Citation:

YANG Xiangyang, WU Dun, ZHU Youlin, LI Junguo, ZHANG Ruizhi, ZHANG Jian, LUO Guoqiang. Molecular Dynamics Simulation Study on Spallation Failure of [100] Single Crystal Aluminum under Different Waveform Loadings[J]. Chinese Journal of High Pressure Physics, 2024, 38(3): 030106. doi: 10.11858/gywlxb.20240786

Citation:

YANG Xiangyang, WU Dun, ZHU Youlin, LI Junguo, ZHANG Ruizhi, ZHANG Jian, LUO Guoqiang. Molecular Dynamics Simulation Study on Spallation Failure of [100] Single Crystal Aluminum under Different Waveform Loadings[J]. Chinese Journal of High Pressure Physics, 2024, 38(3): 030106. doi: 10.11858/gywlxb.20240786

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Molecular Dynamics Simulation Study on Spallation Failure of [100] Single Crystal Aluminum under Different Waveform Loadings

doi: 10.11858/gywlxb.20240786

YANG Xiangyang^{1, 2
,},
WU Dun¹,
ZHU Youlin^{2, 3},
LI Junguo^{2, 3},
ZHANG Ruizhi^{1, 2,*
,
,},
ZHANG Jian^{2, 3,*
,
,},
LUO Guoqiang^{2, 3}

1.
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang 621999, Sichuan, China
2.
Hubei Technology Innovation Center for Advanced Composites, Wuhan University of Technology, Wuhan 430070, Hubei, China
3.
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, Hubei, China

Received Date: 09 Apr 2024
Rev Recd Date: 28 Apr 2024

Available Online: 23 May 2024

Issue Publish Date: 03 Jun 2024

Abstract

Abstract

In this study, molecular dynamics method was used to simulate the deformation and spallation behavior of [100] single crystal aluminum under the action of equivalent ramp waves and square waves. Accordingly, the correlation between loading waveform and spallation behavior was analyzed. The results showed that the synergistic effect of the pulse shape transition and the thermodynamic path affected the material spallation. The nucleation of non-uniform holes dominated by defects was not the decisive factor affecting the spallation strength of materials. The difference of spallation characteristics of materials under different loading waveforms was mainly determined by the difference of temperature rise under different thermodynamic paths, which led to uniform spallation at maximum velocity of 3.00 km/s, but the spall strength of ramp wave group was 56.6% higher than that of square wave group. Due to the gradual compression and slight temperature softening effect, the ramp wave loading made the material presented milder damage than the impact loading, which became more significant with the increase of loading speed.
- spallation,
- single crystal aluminum,
- molecular dynamics simulation,
- ramp wave loading

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References(32)

References

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Molecular Dynamics Simulation Study on Spallation Failure of [100] Single Crystal Aluminum under Different Waveform Loadings

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