椀形レーザフォーミングの収縮量に及ぼす板長と初期曲率半径の影響

抄録

In the previous reports, one of the authors showed that a long specimen's in-plane strain geodetically estimated from the final shape after laser forming has sufficient agreement with the in-plane strain measured from a distance change of landmarks.
For short specimens, these two type in-plane strains are not compatible because of the in-plane strain parallel to laser heating line.
To form bowl shape thin plate by laser forming, accurate in-plane strain should be introduced into the plate. So, both parallel and perpendicular in-plane strains should be presented accurately for objects in various size and shape.
In this report, effects of both specimen length and initial curvature on in-plane strains in two directions, parallel and perpendicular, are investigated experimentally.