Discrete Dislocation Modeling of Plastic Flow Processes

2007 ◽  
Vol 340-341 ◽  
pp. 31-38
Author(s):  
Alan Needleman ◽  
E. Van der Giessen ◽  
Vikram Deshpande
Keyword(s):  
Plastic Flow ◽  
Discrete Dislocation ◽  
Flow Processes ◽  
Dislocation Modeling

scholarly journals Discrete dislocation modeling in three-dimensional confined volumes

2001 ◽  
Vol 309-310 ◽  
pp. 420-424 ◽  
Author(s):  
D. Weygand ◽  
L.H. Friedman ◽  
E. van der Giessen ◽  
A. Needleman
Keyword(s):  
Three Dimensional ◽  
Discrete Dislocation ◽  
Dislocation Modeling

scholarly journals Analysis of spatial stress and velocity fields in plastic flow processes

2019 ◽  
Vol 20 (2) ◽  
pp. 330-340
Author(s):  
Nikolai Dmitrievich Tutyshkin ◽  
Vadim Yurievich Travin
Keyword(s):  
Plastic Flow ◽  
Velocity Fields ◽  
Flow Processes ◽  
Spatial Stress

scholarly journals On the similarity of plastic flow processes during smooth and jerky flow: Statistical analysis

2012 ◽  
Vol 60 (9) ◽  
pp. 3729-3740 ◽  
Author(s):  
M.A. Lebyodkin ◽  
N.P. Kobelev ◽  
Y. Bougherira ◽  
D. Entemeyer ◽  
C. Fressengeas ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Plastic Flow ◽  
Jerky Flow ◽  
Flow Processes

Discrete dislocation modeling of stress corrosion cracking in an iron

2015 ◽  
Vol 33 (6) ◽  
pp. 467-475 ◽  
Author(s):  
Ilaksh Adlakha ◽  
Kuntimaddi Sadananda ◽  
Kiran N. Solanki
Keyword(s):  
Stress Corrosion ◽  
Crack Growth ◽  
Small Scale ◽  
Plastic Behavior ◽  
Surface Energies ◽  
Discrete Dislocation ◽  
Yielding Condition ◽  
Scale Yielding ◽  
Corrosion Mechanisms ◽  
Dislocation Modeling

AbstractMaterial strengthening and embrittlement are controlled by interactions between dislocations and hydrogen that alter the observed deformation mechanisms. In this work, we used an energetics approach to differentiate two fundamental stress corrosion mechanisms in iron, namely, hydrogen-enhanced localized plasticity and hydrogen-enhanced decohesion. Considering the small-scale yielding condition, we use a discrete dislocation framework with line dislocations to simulate the crack-tip plastic behavior. The crack growth was modeled using the change in surface energies (cohesive zone laws) due to hydrogen segregation. The changes in the surface energies as a function of hydrogen concentration are computed using atomistic simulations. Results indicate that, when hydrogen concentrations are low, crack growth occurs by alternating mechanisms of cleavage and slip. However, as the hydrogen concentrations increased above some critical value, the crack grows predominately by the cleavage-based decohesion process.

scholarly journals Discrete dislocation modeling of fatigue crack propagation

2002 ◽  
Vol 50 (4) ◽  
pp. 831-846 ◽  
Author(s):  
V.S. Deshpande ◽  
A. Needleman ◽  
E. Van der Giessen
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Discrete Dislocation ◽  
Dislocation Modeling
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