naa a22 4500 530098849 20181026074616.0 cr unu---uuuuu 181026e20180907xx s 100 0 eng 10.3929/ethz-b-000295650 doi 10.1051/epjconf/201818302022 doi (ETHRESEARCH)oai:www.research-collection.ethz.ch:20.500.11850/295650 Rate-dependent ductile fracture under plane strain tension: Experiments and simulations [Elektronische Daten] [Vincent Grolleau, Vincent Lafilé, Christian C. Roth, Bertrand Galpin, Laurent Mahéo, Dirk Mohr] Les Ulis EDP Sciences 2018 6 p. Open access ethresearch Among all other stress states achievable under plane stress conditions, the lowest ductility is consistently observed for plane strain tension. For static loading conditions, V-bending of small sheet coupons is the most reliable way of characterising the strain to fracture for plane strain tension. Different from conventional notched tension specimens, necking is suppressed during V-bending which results in a remarkably constant stress state all the way until fracture initiation. The present DYMAT talk is concerned with the extension of the V-bending technique from low to high strain rate experiments. A new technique is designed with the help of finite element simulations. It makes use of modified Nakazima specimens that are subjected to V-bending. Irrespective of the loading velocity, plane strain tension conditions are maintained throughout the entire loading history up to fracture initiation. Experiments are performed on specimens extracted from aluminum 2024-T3 and dual phase DP450 steel sheets. The experimental program includes quasi static loading conditions which are achieved on a universal testing machine. In addition, high strain rate experiments are performed using a specially-designed drop tower system. In all experiments, images are acquired with two cameras to determine the surface strain history through stereo Digital Image Correlation (DIC). The experimental observations are discussed in detail and also compared with the numerical simulations to validate the proposed experimental technique 12th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading (DYMAT 2018) in Arcachon, France (September 9-14, 2018) Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0 ethresearch Grolleau Vincent joint author Lafilé Vincent joint author Roth Christian C. joint author Galpin Bertrand joint author Mahéo Laurent joint author Mohr Dirk joint author EPJ Web of Conferences, 183 () Les Ulis : EDP Sciences p. 02022 2100-014X http://hdl.handle.net/20.500.11850/295650 text/html WWW-Backlink auf das Repository (Open access) 1 Conference Paper ethresearch ETHRESEARCH 856 40 http://hdl.handle.net/20.500.11850/295650 text/html WWW-Backlink auf das Repository (Open access) ETHRESEARCH 700 1- Grolleau Vincent joint author ETHRESEARCH 700 1- Lafilé Vincent joint author ETHRESEARCH 700 1- Roth Christian C. joint author ETHRESEARCH 700 1- Galpin Bertrand joint author ETHRESEARCH 700 1- Mahéo Laurent joint author ETHRESEARCH 700 1- Mohr Dirk joint author ETHRESEARCH 773 0- EPJ Web of Conferences, 183 () Les Ulis : EDP Sciences p. 02022 2100-014X BK010053 XK010053 XK010000 ETHRESEARCH ETHRESEARCH ETHRESEARCH Conference Paper Open access