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 110016, India *Phone: (+91) (11) 2659 1340, Fax: (+91) (11) 2658 1119, URL: http://web.iitd.ac.in/~anandh 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 x  PLOT OF THEORETICAL EQUATION y  PLOT OF THEORETICAL EQUATION