CHIN. PHYS. LETT. Vol. 26, No. 1 (2009) 016103

JIANG Min-Qiang(蒋敏强)1, JIANG Si-Yue(江思跃)1, DAI Lan-Hong(戴兰宏)1,2**
1State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190
2State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081
(Received 3 October 2008)

Shear deformation can induce normal stress or hydrostatic stress in metallic glasses [Nature Mater. 2 (2003)
449, Intermetallics 14 (2006) 1033]. We perform the bulk deformation of three-dimensional Cu46Zr54 metallic
glass (MG) and Cu single crystal model systems using molecular dynamics simulation. The results indicate that
hydrostatic stress can incur shear stress in MG, but not in crystal. The resultant pronounced asymmetry between tension and compression originates from this inherent shear-dilatation coexistence in MG.

金属玻璃中的剪胀 CPL-2009