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Volume 38 Issue 7
Jul.  2012
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Journal of Beijing University of Aeronautics and Astronautics  > 2012  >  (7): 936-940.
Yi Min, Shen Zhigang, Guo Yaofenget al. Numerical simulation of shear band in amorphous alloy with initially random material imperfections[J]. Journal of Beijing University of Aeronautics and Astronautics, 2012, (7): 936-940. (in Chinese)
Citation: Yi Min, Shen Zhigang, Guo Yaofenget al. Numerical simulation of shear band in amorphous alloy with initially random material imperfections[J]. Journal of Beijing University of Aeronautics and Astronautics, 2012, (7): 936-940. (in Chinese)
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Numerical simulation of shear band in amorphous alloy with initially random material imperfections

  • 1.

    School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • 2. School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 08 Jun 2011
  • Publish Date: 30 Jul 2012
    Abstract
  • Based on the free volume theory, a constitutive model of amorphous alloy with free volume as an internal variable was developed to be implemented in the finite element simulation by ABAQUS UMAT subroutine. The initial free volume was taken as the variable of material imperfections. And the initial random material imperfections were defined through extracting random numbers and matching them with element numbering by a FORTRAN program. A plane strain model was utilized to simulate the formation and propagation of shear band in amorphous alloy with initial random material imperfections. It was found that local increase in free volume could induce localized deformation and the subsequent formation of shear band. The nucleation, formation and propagation of shear band could relax the strain and free volume in its surroundings. The simulation could capture the main feature of shear band in amorphous alloy.The results coincide with the experimental observation and the predictions of free volume theory.

     

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    • References(11)
  • [1]
    Greer A L.Metallic glasses [J].Science,1995,267(5206):1947-1953
    [2]
    Johnson W L.Bulk glass-forming metallic alloys:science and technology[J].MRS Bull,1999,24(10):42-56
    [3]
    Spaepen F.A microscopic mechanism for steady state inhomogeneous flow in metallic glasses[J].Acta Metall,1977,25(4):407-415
    [4]
    Steif P S,Spaepen F,Hutchinson J W.Strain localization in amorphous metals [J].Acta Metall,1982,30(2):447-455
    [5]
    Hays C C,Kim C P,Johnson W L.Microstructure controlled shear band pattern formation and enhanced plasticityof bulk metallic glasses containing in situ formed ductile phase dendrite dispersions [J].Phys Rev Lett,2000,84(13):2901-2904
    [6]
    Zhang Z F,Zhang H,Pan X F,et al.Effect of aspect ratio on the compressive deformation and fracture behavior of Zr-based bulk metallic glass[J].Philos Mag Lett,2005,85(10):513-521
    [7]
    Liu F X,Liaw P K,Wang G Y,et al.Specimen-geometry effects on mechanical behavior of metallic glasses[J].Intermetallics,2006,14(8/9):1014-1018
    [8]
    Anand L,Su C.A theory for amorphous viscoplastic materials undergoing finite deformations,with application to metallic glasses[J].J Mech Phys Solids,2005,53(6):1362-1396
    [9]
    Gao Y F.An implicit finite element method for simulating inhomogeneous deformation and shear bands of amorphous alloys based on the free-volume model[J].Modelling Simul Mater Sci Eng,2006,14(8):1329-1345
    [10]
    Wu W F,Zhang C Y,Zhang Y W,et al.Stress gradient enhanced plasticity in a monolithic bulk metallic glass [J].Intermetallics,2008,16(10):1190-1198
    [11]
    Dassault Syst鑝es Simulia Corp.ABAQUS V6.9 User-s manual [M].RI:Dassault Syst鑝es Simulia Corp,2009
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