Abstract
Abstract The sweeping of small dipolar loops by gliding dislocations is thought to be one of the mechanisms leading to dislocation pattern formation during cyclic deformation. The individual sweeping event was calculated within the framework of isotropic linear elasticity for an infinite straight gliding segment and a rigid dipolar prismatic loop. With respect to previous estimates, the present one includes the finite size of the loop and the character of the gliding dislocation. The conditions for sweeping were quantitatively estimated as a function of the geometrical factors and the local effective and friction forces. The sweeping mechanism is found to be effective for distances between the slip planes of the two defects smaller than 9 times the height of the dipolar loop.
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