中国物理B ›› 2012, Vol. 21 ›› Issue (9): 94601-094601.doi: 10.1088/1674-1056/21/9/094601

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Modelling of spall damage in ductile materials and its application to the simulation of plate impact on copper

张凤国, 周洪强, 胡军, 邵建立, 张广财, 洪滔, 何斌   

  1. Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
  • 收稿日期:2011-11-17 修回日期:2012-04-06 出版日期:2012-08-01 发布日期:2012-08-01
  • 基金资助:
    Project supported by the Science and Technology Development Foundation of China Academy of Engineering Physics (Grant Nos. 2009A09027 and 2009A09006).

Modelling of spall damage in ductile materials and its application to the simulation of plate impact on copper

Zhang Feng-Guo (张凤国), Zhou Hong-Qiang (周洪强), Hu Jun (胡军), Shao Jian-Li (邵建立), Zhang Guang-Ca (张广财), Hong Tao (洪滔), He Bin (何斌)   

  1. Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
  • Received:2011-11-17 Revised:2012-04-06 Online:2012-08-01 Published:2012-08-01
  • Contact: Zhang Feng-Guo E-mail:zhang_fengguo@iapcm.ac.cn
  • Supported by:
    Project supported by the Science and Technology Development Foundation of China Academy of Engineering Physics (Grant Nos. 2009A09027 and 2009A09006).

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摘要： A statistical model of dynamic spall damage due to void nucleation and growth is proposed for ductile materials under intense loading, which takes into account inertia, elastic-plastic effect, and initial void size. To some extent, void interaction could be accounted for in this approach. Based on this model, the simulation of spall experiments for copper is performed with the Lagrangian finite element method. The simulation results are in good agreement with experimental data for the free surface velocity profile, stress record behind copper target, final porosity, and void concentrations across the target. The influence of elastic-plastic effect upon the damage evolution is explored. The correlation between the damage evolution and the history of the stress near the spall plane is also analyzed.

关键词: spall damage, ductile materials, free surface velocity, plate impact

Abstract: A statistical model of dynamic spall damage due to void nucleation and growth is proposed for ductile materials under intense loading, which takes into account inertia, elastic-plastic effect, and initial void size. To some extent, void interaction could be accounted for in this approach. Based on this model, the simulation of spall experiments for copper is performed with the Lagrangian finite element method. The simulation results are in good agreement with experimental data for the free surface velocity profile, stress record behind copper target, final porosity, and void concentrations across the target. The influence of elastic-plastic effect upon the damage evolution is explored. The correlation between the damage evolution and the history of the stress near the spall plane is also analyzed.

Key words: spall damage, ductile materials, free surface velocity, plate impact

中图分类号:  (Fracture mechanics, fatigue and cracks)

  • 46.50.+a
46.40.-f (Vibrations and mechanical waves)