1. SIMULATION OF EDGE DISLOCATIONS AND THEIR INTERACTIONS BY FINITE ELEMENT METHOD
Rajib Chandra Das, Rajesh Prasad, Mukesh Gupta and Anandh Subramaniam*
Indian Institute of Technology, New Delhi , India
*Phone: (+91) (11) , Fax: (+91) (11) , URL:
INTRODUCTION
Understanding the stress fields and energetics of dislocations is of fundamental importance towards comprehending material behaviour at the microscopic scale. In this investigation a simple sessile edge dislocation is simulated using Finite Element Method by feeding-in the appropriate stress-free Eshelby strains in the model, corresponding to the introduction of an extra half-plane of atoms. The Eshelby strains are imposed as thermal strains in the numerical model using the software package ABAQUS/STANDARD [Version 6.5, 2005]. The results of the simulation are compared with the standard equations from the elasticity theory of dislocations. The utility of the simulation is shown using: interaction of an edge dislocation with a free surface and interaction between edge dislocations in various configurations.
Key words: Dislocation stress fields; Finite element method
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