How does a frank reed source generate dislocations?

[kpx001]

Hey sorry but I've been looking through several online resources and books but I cannot find a dumbed down explanation of how a frank reed source generates dislocations. Like what is the shears doing and the burgers vector?? I am so confused can someone enlighten me please? thanks

 

[Mapes]

Hey sorry but I've been looking through several online resources and books but I cannot find a dumbed down explanation of how a frank reed source generates dislocations. Like what is the shears doing and the burgers vector?? I am so confused can someone enlighten me please? thanks

Does http://books.google.com/books?id=wh...ge&q="frank read source" dislocation&f=false" help answer your questions? The center of the pinned dislocation (later to become a dislocation loop) moves in the direction of the shear stress. The Burgers vector points in the direction of the shear stress also (for the entire dislocation).