Study of Shock-induced Polycrystalline Iron Phase Transition with DEM

LIU Chao;SHI Yi-na;QIN Cheng-sen;LIANG Xian-hong

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  • Sponsored by: China Association for Science and Technology (CAST)

    Editor-In-Chief: Xu Yida

    ISSN 1000-1093

    　

  • Hosted By: China Ordnance Society

    Published By: Acta Armamentarii

    CN 11-2176/TJ

Acta Armamentarii, a Chinese monthly journal, was first published in 1979. The journal is supervised by China Association for Science and Technology, sponsored by China Ordnance Society，and edited and published by Editorial Board of Acta Armamentarii. The Journal is included in all important domestic databases，and also collected by Engineering Index (EI, USA), Chemical Abstracts (CA, USA), Science Abstracts (SA, UK）, Abstract Journal (AJ, Russia), and Current Bibliography on Science and Technology(CBST).Acta Armamentarii has been selected into the journal Of Ordnance Science and Technology (Weapons Industry) Field Of High Quality Scientific and Technological Periodical Classification Catalogue (2022 edition), ranking T1, and the journal of Automotive Engineering Field of High Quality Scientific and technological Periodical classification Catalogue, ranking T2.
Acta Armamentarii ›› 2014, Vol. 35 ›› Issue (7) : 1009-1015. DOI: 10.3969/j.issn.1000-1093.2014.07.011
Paper

Study of Shock-induced Polycrystalline Iron Phase Transition with DEM

  • LIU Chao, SHI Yi-na, QIN Cheng-sen, LIANG Xian-hong
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Abstract

Numerical simulations on α-iron and polycrystalline iron are conducted using discrete element method (DEM) combined with undiffused two-phase transition model, thermodynamic consistent free energy function, and phase transition kinetics of relaxation equation. The phase boundary and Hugoniot relation are obtained through numerical simulation. The simulation result of polycrystalline iron shows that the shock-front irregularities rise when the propagation distance of shock wave increases; and the shock-front is more irregular in the coarse grain model than in the fine grain model; the phase transitions in the polycrystalline are heterogeneous, and the transitions are observed first along grain boundaries. The curve of local average pressure and transformed mass fraction is obtained.

Key words

explosion mechanics / shock-induced phase transition / discrete element method / polycrystal

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LIU Chao, SHI Yi-na, QIN Cheng-sen, LIANG Xian-hong. Study of Shock-induced Polycrystalline Iron Phase Transition with DEM. Acta Armamentarii. 2014, 35(7): 1009-1015 https://doi.org/10.3969/j.issn.1000-1093.2014.07.011

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