强冲击下金属材料动态损伤与破坏的分子动力学模拟研究进展

王嘉楠; 伍鲍; 何安民; 吴凤超; 王裴; 吴恒安

doi:10.11858/gywlxb.20210747

强冲击下金属材料动态损伤与破坏的分子动力学模拟研究进展

doi: 10.11858/gywlxb.20210747

王嘉楠^1,,
伍鲍¹,
何安民²,
吴凤超³,
王裴²,
吴恒安^1,*, ,

1.
中国科学技术大学近代力学系，中国科学院材料力学行为和设计重点实验室，安徽合肥　230027
2.
北京应用物理与计算数学研究所，北京　100094
3.
中国工程物理研究院流体物理研究所，四川绵阳　621999

基金项目: 科学挑战专题（TZ2016001）

详细信息

作者简介:
王嘉楠（1995－），男，博士研究生，主要从事复杂加载下金属材料损伤与破碎行为及其机理研究. E-mail：wjn1995@mail.ustc.edu.cn

通讯作者:
吴恒安（1975－），男，博士，教授，主要从事微结构材料行为与设计、固液界面力学与限域传质以及计算力学方法与应用研究. E-mail：wuha@ustc.edu.cn

中图分类号: O347.3
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出版历程
- 收稿日期: 2021-03-16
- 修回日期: 2021-04-22

Research Progress on Dynamic Damage and Failure of Metal Materials under Shock Loading with Molecular Dynamics Simulation

1.
CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, Anhui, China
2.
Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
3.
Institute of Fluid Physics, CAEP, Mianyang 621999, Sichuan, China

摘要

摘要: 强冲击下金属材料的动力学过程及其内在的机理分析一直是冲击物理的前沿，无论是在国家基础工程还是尖端武器研制中都具有重要的意义与价值。结合课题组的相关工作，综述了国内外冲击物理领域对金属材料在强冲击作用下动态损伤和破坏行为及其机理等问题的研究进展，重点讨论了金属材料内部及表界面微观结构对损伤破坏机制的影响，介绍了复杂加载条件下材料行为研究的机遇与挑战，并展望了下一步研究工作的重点。
- 强冲击 /
- 动力学损伤破坏 /
- 层裂 /
- 微喷射 /
- 复杂加载 /
- 分子动力学
Abstract: The dynamic process and internal mechanism of metal materials under shock loading have always been focused on shock physics fields, which are of great importance in both national basic engineering and development of cutting-edge weapons. Recent research progress of mechanical behavior and mechanics of metal materials loaded by shock wave based on our previous study is reviewed in this paper. We focus on the influence of internal and surface interface microstructure of metal materials on the mechanics of damage and failure processes and introduce the opportunities and challenges of material behavior under complex loading conditions. Finally, direction and key point of future work were discussed.
- shock loading /
- dynamic damage and failure /
- spallation /
- micro-jet /
- complex loading conditions /
- molecular dynamic simulation

HTML全文

图 1 传统层裂和微层裂破碎过程^[34]

Figure 1. Damage processes of classical spallation and micro-spallation^[34]

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图 2 冲击熔化时样品的破碎过程^[36]

Figure 2. Damage process of sample under shock melting^[36]

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图 3 多晶铜内孔洞的成核以及后续长大合并过程^[41]

Figure 3. Processes of void nucleation, growth and coalescence in polycrystalline copper^[41]

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图 4 不同冲击强度下样品的加载和卸载路径^[43]

Figure 4. Loading and unloading paths of samples under different shockstrengths^[43]

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图 5 不同冲击加载方向和强度下位错形成的位置差异^[46]

Figure 5. Differences in the position of dislocations under different shock loading directions and strengths^[46]

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图 6 不同初始结构在冲击加载下形成的内部射流形态^[50]

Figure 6. Shape of the internal jet under shock loading with different initial structures^[50]

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图 7 初始加载速度为3 km/s时不同初始内部结构的样品沿冲击方向的速度分布：(a)～(d)所对应的样品内部含半径r为3 nm的氦泡，(e)～(g)所对应的样品内部含半径r为3 nm的孔洞，(h)对应的样品内部含半径r为1.5 nm的氦泡^[53]

Figure 7. Snapshots of velocity maps along the shock direction under the loading condition of 3 km/s: (a)–(d), (e)–(g), and (h) represent the He bubble with r = 3.0 nm, the void with r = 3.0 nm, and the He bubble with r = 1.5 nm in the initial samples, respectively^[53]

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图 8 三角波加载下含沟槽金属表面动力学破碎过程^[56]

Figure 8. Dynamic fracture process of grooved metal surface under unsupported wave loading^[56]

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图 9 卸载熔化时表面微射流产生^[58]

Figure 9. Micro-jet formation with release melting^[58]

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图 10 不同沟槽角度下微喷射流的物质来源^[60]

Figure 10. Micro-jets and their sources of different half angles^[60]

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图 11 层裂损伤区的微结构演化

Figure 11. Microstructure evolution of spall damaged region

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强冲击下金属材料动态损伤与破坏的分子动力学模拟研究进展

doi: 10.11858/gywlxb.20210747

作者简介: 王嘉楠（1995－），男，博士研究生，主要从事复杂加载下金属材料损伤与破碎行为及其机理研究. E-mail：wjn1995@mail.ustc.edu.cn

通讯作者: 吴恒安（1975－），男，博士，教授，主要从事微结构材料行为与设计、固液界面力学与限域传质以及计算力学方法与应用研究. E-mail：wuha@ustc.edu.cn

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Research Progress on Dynamic Damage and Failure of Metal Materials under Shock Loading with Molecular Dynamics Simulation

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作者简介:
王嘉楠（1995－），男，博士研究生，主要从事复杂加载下金属材料损伤与破碎行为及其机理研究. E-mail：wjn1995@mail.ustc.edu.cn

通讯作者:
吴恒安（1975－），男，博士，教授，主要从事微结构材料行为与设计、固液界面力学与限域传质以及计算力学方法与应用研究. E-mail：wuha@ustc.edu.cn