26 / 2026-03-04 18:32:09

Theoretical Study on Micro-jetting and Micro-spall at Metal Interfaces under Extreme Conditions

microspall,micro-jetting,thoeoretical study

高压物理与材料科学 > 动高压物理与材料科学

Theoretical Study on Micro-jetting and Micro-spall at Metal Interfaces under Extreme Conditions

Xin-Xin Wang¹, An-Min He¹, Bao Wu¹, Qiang Bao¹, Hao-Nan Sui¹, Pei Wang^1,*



Explosive detonation or intense laser driving can induce micro-jetting and micro-spall on metal surfaces. The former arises from the interaction of the shock wave with machined surface perturbations, producing fine, high-velocity particles; the latter results from internal damage caused by rarefaction waves. Under multiple shocks, these processes couple, micro-spall undergoes recompression while secondary micro-jetting occurs at the interface, leading to complex responses with distinct yet intertwined mechanisms. In extreme environments, additional factors such as corrosion and internal helium bubble formation, driven by ambient conditions and irradiation, further influence interface fragmentation behavior. We revealed a zigzag transition in the spall strength of low-melting-point metals with phase state, discovered high-temperature rise and pressure rebound during micro-spall recompression, and developed a unified theoretical model for micro-void damage growth and recompression over a wide pressure range. Using the isobaric Wu-Jing equation, we fully characterized recompression damage evolution in helium-containing metals. Furthermore, we identified the mechanisms by which nano-sized helium bubbles and complex shock loading/unloading affect micro-jetting, and established a couple RMI-DMA theoretical model for secondary-shock micro-jetting. Then, we overcomes the bottleneck in large-scale macroscopic fluid simulations of micro-jetting fragmentation and has been validated in experimentally. These findings provide a theoretical foundation for accurately describing the impact fragmentation and compression evolution of metallic materials under extreme conditions.



About the Speaker: Xin-Xin Wang, Associate Professor at the Institute of Applied Physics and Computational Mathematics, and doctoral supervisor. Research focuses on theory and application of dynamic fragmentation at metal interfaces under extreme conditions, particularly evolution under complex dynamic paths and multi-physics coupling effects. Innovative contributions include theoretical modeling of metal interface fragmentation under intense shock and elucidation of mechanisms involving complex dynamic paths and microstructural changes. Led multiple research projects, including the National Natural Science Foundation of China and key laboratory foundation projects et al.. Published over 30 SCI-indexed papers in journals such as Int. J. Plast., Int. J. Mech. Sci., Int. J. Impact. Engi., Mater. Des., Phys. Fluids, and J. Nucl. Mater.. Recipient of the Young Research Talent Award from IAPCM and the title of Outstanding Young Scholar in High Pressure Science (5th session).

1. Xin-Xin Wang, Qiang Bao, An-Min He, Jian-Li Shao, Pei Wang*, Molecular Dynamics Simulation of Micro-Jetting and Spallation in Helium-Bubble Copper under Double Supported Shocks, Chinese Journal of High Pressure Physics, 2025.(Invited, In Press)


2. Qiang Bao, Haonan Sui, Bao Wu, Xin-Xin Wang*, Qi Zhu, Jian-Li Shao, An-Min He, and Pei Wang*, Near-surface fragmentation in irradiated copper under two successive shock loading: effects of local temperature re-distribution and helium bubble expansion, Materials & Design, 2025,254(1):114013.


3. Bao Wu, Xin-Xin Wang*, Jian-Zhen Qian, Qiang Bao, Hao-Nan Sui, Pei Wang*, Numerical Investigation of Shock-induced Ejecta Breakup and Size Distributions, International Journal of Impact Engineering, 2025, 198: 105217.


4. Sheng-Ning Yan, Bao Wu, Xin-Xin Wang*, Qiang Bao, Hao-Nan Sui, An-Min He, Pei Wang*, The mechanisms of temperature rise and wavefront broadening induced by nanoscale He bubbles in copper during shock loadings, Journal of Applied Physics, 2025,137:205903.


5. Qiang Bao, Bao Wu, Xin-Xin Wang*, Haonan Sui, Hua Yun. Geng, Jian-Li Shao, Hai-Quan Sun, An-Min He, and Pei Wang*. Molecular dynamics investigation of unsupported double-shock induced micro-jet behaviors in copper containing helium bubbles, Physics of Fluids, 2024, 36:112101.


6. Haonan Sui, Xin-Xin Wang*, Bao Wu, Qiang Bao, Fengguo Zhang, Haiquan Sun, Anmin He, Pei Wang*. Cooperative competition between melt-phase and void during micro-spallation and recompression, International Journal of Mechanical Science, 2024, 275:109276.


7. Bao Wu, Xin-Xin Wang*, Hao-Nan Sui, Qiang Bao, An-Min He, Hai-Quan Sun, Qiang Wu, Pei Wang, Shock compression of Porous Copper Containing Helium: Molecular Dynamics Simulations and Theoretical Model, International Journal of Plasticity, 2024, 174:103899.


8. Xin-Xin Wang, Jian-Li Shao*, Bao Wu, Sheng-Ning Yan, An-Min He, Pei Wang*, Enhancement of metal surface micro-jet by nanoscale He bubbles under supported and unsupported shocks, Physics of Fluids, 2023, 35, 052112.  


9. Bao Wu, An-Min He, Xin-Xin Wang*, Hai-Quan Sun*, Pei Wang, Numerical Investigation of Ejecta Mass of Twice-shocked Liquid Sn. Journal of Applied Physics, 2023, 133: 165903；


10. Xin-Xin Wang, Ting-Ting Zhou, Zhi-Yuan Sun, Xiao-Feng Shi, Hai-Quan Sun, Feng-Guo Zhang, Jian-Wei Yin, An-Min He*, Pei Wang*, Micro-spall damage and subsequent re-compaction of release melted lead under shock loading, Computational Materials Science, 2022, 203: 111178;


11. Xin-Xin Wang, Zhi-Yuan Sun, Fu-Qi Zhao, An-Min He*, Ting-Ting Zhou, Hong Qiang Zhou, Feng-Guo Zhang, Pei Wang*, An atomic view on the evolution of spall damage in solid-liquid mixed aluminum at high strain rates through stretching simulations, Journal of Applied Physics, 2021, 130, 205901.


12. Xin-Xin Wang, An-Min He*, Ting-Ting Zhou, Pei Wang*, Spall damage in single crystal tin under shock wave loading: a molecular dynamics simulation, Mechanics of Materials, 2021, 160: 103991.


13. Xin-Xin Wang, An-Min He*, Yu Yang, Pei Wang*, Jianguo Wang, Shock responses of nanoporous copper with helium doping by molecular, Computational Materials Science, 2021, 188: 110190.