85. 10 Forces on dislocate i on ◆|.| ntr i on 1. Definition Fis a fictitious force which is supposed to be responsible for the motion of dislocation Criterion The work done on crystal by stress must be equal to that done on dislocation by force F 2. Principle of derivation of F Macroscopic work=microscopic work (or deformation work)§5.10 Forces on dislocation ◆ Ⅰ.Introduction 1. Definition: is a fictitious force which is supposed to be responsible for the motion of dislocation. ∥ Criterion: The work done on crystal by stress must be equal to that done on dislocation by force F. 2. Principle of derivation of : Macroscopic work＝microscopic work (or deformation work) F  F      F