About "burgers"--Dislocations and plastic flow
"burgers" presents a model for dislocation motion in crystalline solids. It displays the two planes of atoms on either side of a slip plane. Single dislocations (of either sign) or a pair of dislocations can be introduced oriented at any angle with respect to the Burgers vector. The screw and edge dislocations are limiting cases. A shear stress can be applied and the critical shear stress for failure of the perfect crystal, for dislocation motion, and for kink motion along a dislocation can be empirically determined. An impurity of variable pinning strength may be introduced and its pinning strength measured. A Frank-Read source is also illustrated.
"burgers" was programmed by Russ Thompson.
About the SSS Project.
Table of contents for Chapter 15 of "Simulations for Solid State Physics"
- Introduction
- About the "burgers" model
- Perfect crystal
- Single dislocation
- Dislocation geometry
- Dislocation width and energy
- Critical shear stress with dislocations
- Impurity pinning
- Dislocation interactions
- Frank-Read source
- Summary
- Appendix: "burgers" -- the program