Advanced Technologies and Materials

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut ero labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco.

GUIDE FOR AUTHORS SUBMIT MANUSCRIPT
Vol. 32 No. 1-2 (2007): Journal for Technology of Plasticity
Original articles

The effect of forming history and strain rate on forming limit diagrams

Pavel Doubek
Technical University in Liberec, Czech Republic, Department of Manufacturing Engineering, Metal Forming Section
Mirko Král
Technical University in Liberec, Czech Republic, Department of Manufacturing Engineering, Metal Forming Section

Published 2007-12-21

abstract views: 6 // Full text article (PDF): 4


Keywords

  • strain rate,
  • steel sheets,
  • forming limit diagrams,
  • deep drawing

How to Cite

Doubek, P., & Král, M. (2007). The effect of forming history and strain rate on forming limit diagrams. Advanced Technologies and Materials, 32(1-2), 39–46. Retrieved from https://jged.uns.ac.rs/index.php/atm/article/view/jtp.2007.32.1-2.4

Abstract

Metal sheets produced from higher strength steels are now extensively used in the automotive industry. Products formed from these materials are used mainly for parts expected to resist high impact loading. This report presents FLD’s determined at punch velocities from 2.08*10-4 m/s up to 22.5 m/s. A special experimental stand, able to produce striking velocities up to 50 m/s, had to be built for these measurements. Limiting strains for selected materials are evaluated at different stress states. The effect of the forming history was evaluated on specimens already deep drawn and then loaded by high velocity impact till fracture. Different punch velocities, magnitude and direction of the first draw have influenced the limiting strains. Higher strength steel TRIP steel RAK 40/70 was used for the experiments. The research results should be used in the motorcar industry for design, manufacturing and crash test simulation.

PlumX Metrics

Dimensions Citation Metrics