Notice: Due to planned maintenance work, the TU Dortmund websites will be unavailable for short periods of time several times on April 17, 2024 between 6:00 p.m. and 8:00 p.m.
We apologize for any inconvenience this may cause and thank you for your understanding.
To content
Department of Mechanical Engineering

Damage in Sheet Metal Bending of Lightweight Profiles

-
in
  • Profil- und Blechumformung
  • Mechanik
  • Umformtechnische Grundlagenforschung
  • Materialcharakterisierung
  • Verbund- / Großprojekt
Experiments on damage investigation in multi-stage sheet metal forming and hot sheet metal forming © IUL
Experiments on damage investigation in multi-stage sheet metal forming and hot sheet metal forming
Funding

German Research Foundation (DFG)

Project

SFB/TRR 188 • Subproject A05

Contact

Philipp Lennemann M. Sc.

Processes such as air and die bending or roll forming are used to produce bent parts from high-strength steel materials. The results of the first funding period show that damage in sheet metal forming of DP800 dual-phase steel depends to a large extent on the stress state during forming. The reduction of damage leads to an increase in the performance of bent parts in terms of absorbed impact energy, stiffness, and fatigue strength.

The overall objective of the current second funding period is to understand the interaction of damage mechanisms under hydrostatic and deviatoric stress path changes in DP800 and to control the damage. For this purpose, the process chain of profile production is considered, where a straight profile is produced by roll forming or by air bending and then curved by three roll push bending or rotary draw bending. In the area of hot sheet forming, the damage-critical influences during press hardening of 22MnB5 are also identified.