- JAPAN INST METALS
Laser forming is applied on not only flat but also curved plates to create some valuable shapes on them. This method uses two typical deformations, transverse shrinkage and angular distortion caused by laser heating. Many researchers investigated these deformations caused by conventional heating on flat plates in their needs for a long time. In recent days, laser forming comes up as a new clean method to create curved surfaces by using these deformations due to thermal strains. However, even basic behavior has not yet been clear in case that heating is out on already curved plate with initial curvature radius. In this report, transverse shrinkage and angular distortion are investigated as a function of initial curvature radius of a plate. As a result, the effect of initial curvature on transverse shrinkage was basically very small and slightly affected by in plane strain distribution. Angular distortion of curved plate shows very different behavior from that of flat plate. Curved plates had a tendency to bend to its convex side even heated on convex or concave surface. This phenomenon typically appeared with large heat input.
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