Heterogeneous fragmentation of metallic liquid microsheet with high velocity gradient

doi:10.1088/1674-1056/25/1/017102

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.

Keywords: molecular dynamics ejection

Received: 24 May 2015
Revised: 11 September 2015
Accepted manuscript online:

PACS:	71.15.Pd	(Molecular dynamics calculations (Car-Parrinello) and other numerical simulations)
	62.50.-p	(High-pressure effects in solids and liquids)

Fund:

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).

Corresponding Authors: An-Min He
E-mail: he_anmin@iapcm.ac.cn

Cite this article:

An-Min He(何安民), Pei Wang(王裴), Jian-Li Shao(邵建立) Heterogeneous fragmentation of metallic liquid microsheet with high velocity gradient 2016 Chin. Phys. B 25 017102

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