TY - GEN
T1 - Investigation of a Pre-strain-Specific Edge Crack Sensitivity Factor and Its Implementation in FEM
AU - Kindsmueller, Alexander
AU - Norz, Roman
AU - Manopulo, Niko
AU - Volk, Wolfram
N1 - Publisher Copyright:
© 2022, The Minerals, Metals & Materials Society.
PY - 2022
Y1 - 2022
N2 - The shear cutting process can significantly reduce the formability of a shear cut edge, which can lead to edge cracking. This problem occurs especially when processing high-strength and ultra-high-strength sheet materials such as dual-phase steels. In practice, component manufacture often takes place as a sequence of several deep drawing and shear cutting operations. However, the influence of prior sheet forming on edge crack sensitivity has not yet been sufficiently investigated and has not been considered in simulations so far. In this work, an experimentally determined model is presented that describes the edge crack sensitivity as a function of pre-forming for a selected cutting strategy for the sheet material HCT580X. Here, a reduced edge crack sensitivity is found with all three uniaxial, plane strain, and biaxial pre-strain modes compared to the undeformed sheet material. This model is implemented into the FEM simulation to study the manufacturability of deep-drawn collars in a previously formed sheet. Finally, the simulation results are validated by means of collar-forming experiments.
AB - The shear cutting process can significantly reduce the formability of a shear cut edge, which can lead to edge cracking. This problem occurs especially when processing high-strength and ultra-high-strength sheet materials such as dual-phase steels. In practice, component manufacture often takes place as a sequence of several deep drawing and shear cutting operations. However, the influence of prior sheet forming on edge crack sensitivity has not yet been sufficiently investigated and has not been considered in simulations so far. In this work, an experimentally determined model is presented that describes the edge crack sensitivity as a function of pre-forming for a selected cutting strategy for the sheet material HCT580X. Here, a reduced edge crack sensitivity is found with all three uniaxial, plane strain, and biaxial pre-strain modes compared to the undeformed sheet material. This model is implemented into the FEM simulation to study the manufacturability of deep-drawn collars in a previously formed sheet. Finally, the simulation results are validated by means of collar-forming experiments.
KW - Collar-forming
KW - Edge crack
KW - FEM
KW - Pre-forming
KW - Shear cutting
UR - http://www.scopus.com/inward/record.url?scp=85134350813&partnerID=8YFLogxK
U2 - 10.1007/978-3-031-06212-4_54
DO - 10.1007/978-3-031-06212-4_54
M3 - Conference contribution
AN - SCOPUS:85134350813
SN - 9783031062117
T3 - Minerals, Metals and Materials Series
SP - 595
EP - 606
BT - NUMISHEET 2022 - Proceedings of the 12th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes
A2 - Inal, Kaan
A2 - Worswick, Michael
A2 - Butcher, Cliff
A2 - Levesque, Julie
PB - Springer Science and Business Media Deutschland GmbH
T2 - 12th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes, NUMISHEET 2022
Y2 - 10 July 2022 through 14 July 2022
ER -