Question: Force on dislocation considers a crystal in the form of a cube of side L containing an edge dislocation of Burgers vector h if the

Force on dislocation considers a crystal in the form of a cube of side L containing an edge dislocation of Burgers vector h if the crystal is subjected to a shear stress σ on the upper and lower faces in the direction of slip, show, by considering energy balance, that the force acting on the dislocation is F = bσ per unit length.

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