Discrete Dislocation Dynamics Simulation of Crack-Tip Plasticity

2005 ◽  
pp. 413-427 ◽  
Author(s):  
Alexander Hartmaier ◽  
Peter Gumbsch
Keyword(s):  
Crack Tip ◽  
Dislocation Dynamics ◽  
Dynamics Simulation ◽  
Discrete Dislocation Dynamics ◽  
Discrete Dislocation ◽  
Crack Tip Plasticity

Crack Tip Plasticity By Classic Dislocation Dynamics

2008 ◽  
Vol 33-37 ◽  
pp. 97-102
Author(s):  
Hiroomi Homma ◽  
Huu Nhan Tran
Keyword(s):  
Short Pulse ◽  
Crack Tip ◽  
Plastic Zone Size ◽  
Dislocation Dynamics ◽  
Crack Tip Opening Displacement ◽  
Opening Displacement ◽  
Discrete Dislocation Dynamics ◽  
Discrete Dislocation ◽  
Crack Tip Plasticity ◽  
Crack Tip Opening

Under very short pulse loads in range from 25 to 100 μs, crack tip plasticity a head of the crack tip in the mode I condition was investigated by discrete dislocation dynamics. The obtained dislocation array parameters such as the number of dislocations, dislocation distribution density, crack tip opening displacement and plastic zone size increase with the magnitude of stress intensity factor, KI and pulse durations. The numerical results were well compared with the experimental ones.

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