Molecular Dynamics Simulations on Local Lattice Instability at Mode I Crack Tip in BCC Iron

Author(s):  
Kisaragi Yashiro ◽  
Yuta Tsugawa ◽  
Hiroshi Katayama
1995 ◽  
Vol 409 ◽  
Author(s):  
Pep Español ◽  
Miguel A. Rubio ◽  
Ignacio Zúñiga

AbstractWe present results obtained by molecular dynamics simulations on the propagation of fast cracks in triangular 2D lattices. Our aim is to simulate Mode I fracture of brittle isotropic materials. We propose a force law that respects the isotropy of the material. The code yields the correct imposed sound c║, shear c┴ and surface VR wave speeds. Different notch lengths are systematically studied. We observe that initially the cracks are linear and always branch at a particular critical velocity c* ≈0.8VR and that this occurs when the crack tip reaches the position of a front emitted from the initial crack tip and propagating at a speed c = 0.6 8VR.


2009 ◽  
Vol 18 (1) ◽  
pp. 251-258 ◽  
Author(s):  
Xie Hong-Xian ◽  
Wang Chong-Yu ◽  
Yu Tao ◽  
Du Jun-Ping

2003 ◽  
Vol 2003.78 (0) ◽  
pp. _7-23_-_7-24_
Author(s):  
Shinichi KISHIMOTO ◽  
Shigenobu OGATA ◽  
Yoji SHIBUTANI

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