Research on Constraint Conditions for Undesirable Deformationby Finite Element Analysis:— Rib Forming on Structural Channel I —

概要

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Structural channels have advantages of low cost and light weight because the geometrical moment of inertia is large despite the light weight. However, the stiffness of the flange in the cross-sectional plane of the channel is small. To increase the stiffness, a reinforcement is welded. Therefore, the authors invented a structural channel with a rib. In this paper, we clarify the effects of constraint conditions on the undesirable deformation of the rib formed on the structural channel by finite element analysis. The process of rib forming is described as follows: (1) a structural channel is set on a die, (2) forming tools hold the web and the flange of the structural channel near the rib is formed, and (3) a punch moves toward the flange opening side from the web side. Warpage occurs because of the in-plane bending of the flange and the drawing of the web; therefore, holding the flange edge is an effective way of decreasing the warpage.
The Japan Society for Technology of Plasticityの論文