中国物理B ›› 2016, Vol. 25 ›› Issue (1): 17102-017102.doi: 10.1088/1674-1056/25/1/017102

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Heterogeneous fragmentation of metallic liquid microsheet with high velocity gradient

An-Min He(何安民), Pei Wang(王裴), Jian-Li Shao(邵建立)   

  1. Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
  • 收稿日期:2015-05-24 修回日期:2015-09-11 出版日期:2016-01-05 发布日期:2016-01-05
  • 通讯作者: An-Min He E-mail:he_anmin@iapcm.ac.cn
  • 基金资助:

    Project supported by the Science and Technology Development Foundation of China Academy of Engineering Physics (Grant Nos. 2013A0201010 and 2015B0201039) and the National Natural Science Foundation of China (Grant No. 11402032).

Heterogeneous fragmentation of metallic liquid microsheet with high velocity gradient

An-Min He(何安民), Pei Wang(王裴), Jian-Li Shao(邵建立)   

  1. Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
  • Received:2015-05-24 Revised:2015-09-11 Online:2016-01-05 Published:2016-01-05
  • Contact: An-Min He E-mail:he_anmin@iapcm.ac.cn
  • Supported by:

    Project supported by the Science and Technology Development Foundation of China Academy of Engineering Physics (Grant Nos. 2013A0201010 and 2015B0201039) and the National Natural Science Foundation of China (Grant No. 11402032).

摘要:

Large-scale molecular dynamics simulations are performed to study the fragmentation of metallic liquid sheets with high velocity gradient. Dynamic fragmentation of the system involves the formation of a network of fragments due to the growth and coalescence of holes, decomposition of the network into filaments, and further breakup of the filaments into spherical clusters. The final size distribution of the fragmented clusters in the large volume limit is found to obey a bilinear exponential form, which is resulted from the heterogeneous breakup of quasi-cylindrical filaments. The main factors contributing to fragmentation heterogeneity are introduced, including strain rate inhomogeneity and matter distribution nonuniformity of fragments produced during decomposition of the network structure.

关键词: molecular dynamics, ejection

Abstract:

Large-scale molecular dynamics simulations are performed to study the fragmentation of metallic liquid sheets with high velocity gradient. Dynamic fragmentation of the system involves the formation of a network of fragments due to the growth and coalescence of holes, decomposition of the network into filaments, and further breakup of the filaments into spherical clusters. The final size distribution of the fragmented clusters in the large volume limit is found to obey a bilinear exponential form, which is resulted from the heterogeneous breakup of quasi-cylindrical filaments. The main factors contributing to fragmentation heterogeneity are introduced, including strain rate inhomogeneity and matter distribution nonuniformity of fragments produced during decomposition of the network structure.

Key words: molecular dynamics, ejection

中图分类号:  (Molecular dynamics calculations (Car-Parrinello) and other numerical simulations)

  • 71.15.Pd
62.50.-p (High-pressure effects in solids and liquids)