ITERATIVE LASER STRAIGHTENING OF WELD-DISTORTED PLATES
Résumé
Abstract:
Laser forming of non-developable surfaces requires an accurate model of both the
bending and membrane strains generated. An iterative approach to laser forming can increase
the accuracy of the final shape generated without the need for extreme levels of accuracy in
material characterisation and process modelling, by using closed loop control of shape
generation. In this paper, we report a new approach to iterative laser forming of non-
developable surfaces, based on a fixed scan lattice where the required membrane strain is
calculated from a finite element simulation. This forming approach has been used to
straighten friction stir-welded AA2024T3 plates. To the best of our knowledge, this work
represents the first iterative laser correction of distorted structures.
Keywords: laser forming (straightening), surface treatment, iterative procedure, finite
element simulation, CO 2 continuous wave laser.
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