Title:
|
Dislocation jamming and Andrade creep
|
Author:
|
Miguel López, María del Carmen; Vespignani, Alessandro, 1965-; Zaiser, Michael; Zapperi, Stefano
|
Other authors:
|
Universitat de Barcelona |
Abstract:
|
We simulate the glide motion of an assembly of interacting dislocations under the action of an external shear stress and show that the associated plastic creep relaxation follows Andrades law. Our results indicate that Andrade creep in plastically deforming crystals involves the correlated motion of dislocation structures near a dynamic transition separating a flowing from a jammed phase. Simulations in the presence of dislocation multiplication and noise confirm the robustness of this finding and highlight the importance of metastable structure formation for the relaxation process. |
Subject(s):
|
-Ciència dels materials -Cristal·lografia -Resistència de materials -Dislocacions en cristalls -Materials science -Crystallography -Strength of materials -Dislocations in crystals |
Rights:
|
(c) American Physical Society, 2002
|
Document type:
|
Article Article - Published version |
Published by:
|
American Physical Society
|
Share:
|
|