|About this Abstract
||NUMISHEET 2021: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||On the Mechanics of Edge Cracking and the Reliable Determination of Edge Formability Limits
||Niko Manopulo, A. R. Chezan, Eisso Atzema, I. Picas Anfruns, Bart Carleer, J Pithammar, Mats Sigvant
|On-Site Speaker (Planned)
Blanked edge surfaces are rough and hardened. They therefore lead to in-homogeneous deformation on the edge, which can trigger localization within the shear affected zone. The size and extent of these phenomena are primarily a function of the shearing process and only marginally coupled to the global deformation of the blank. A direct simulation of such local deformation effects would require a prohibitively high resolution. A predictive modelling can therefore only be achieved by determining limit strains on the edge, which are compatible with the numerical framework used. The present contribution aims discussing the mechanics of edge cracking based on tensile tests with edges blanked with different die clearances. The local and global strain evolution in the vicinity of the edge is analyzed and a new evaluation procedure is proposed for the reliable determination of limit strains. The application of this method in industrial context is also discussed.
||Definite: At-meeting proceedings