Keyword Suggestions

Results
 
 
Account Login
 
 
 
 
 

Library Navigation

 
 

Browse Meetings

 
 
 
QQ8.08 - New Discrete Dislocation Algorithms for Modeling Rate Effects in Plastic Deformation 
Date/Time:
April 24, 2014   4:30pm - 4:45pm
 
Taxonomy
 
 
 
Share:
 

Plastic deformation is due to the collective motion of large numbers of dislocations. A new algorithm is presented to determine equilibrium configurations of dislocations as a function of temperature and strain rate. The equilibrium is achieved by minimizing the total interaction energy of the dislocations and then thermal activation mechanism is incorporated at appropriate time scale. This approach allows decoupling of time scales associated with dislocation glide and it gives access to strain rates that are of interest in practical applications. We verified our new quasi-static method by comparison with full dynamics simulations. Numerical examples show that the new model can capture rate effects over 6 orders of magnitude change in the applied strain rate, with negligible change in the simulation time.
 


 
 
Average Rating: (No Ratings)
  Was great, surpassed expectations, and I would recommend this
  Was good, met expectations, and I would recommend this
  Was okay, met most expectations
  Was okay but did not meet expectations
  Was bad and I would not recommend this
 



Submit
 
Keynote Address
Panel Discussion - Different Approaches to Commercializing Materials Research
Business Challenges to Starting a Materials-Based Company
Fred Kavli Distinguished Lectureship in Nanoscience
Application of In-situ X-ray Absorption, Emission and Powder Diffraction Studies in Nanomaterials Research - From the Design of an In-situ Experiment to Data Analysis