DYMAT 2009
Volume 2, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 1589 - 1594
Section Numerical Simulations
Published online 15 September 2009
DYMAT 2009 (2009) 1589-1594
DOI: 10.1051/dymat/2009224

Influence of flow stress and strain hardening of high strength structural steel on the necking formation under dynamic tension

J.A. Rodriguez-Martinez1, A. Rusinek2 and A. Arias1

1  Department of Continuum Mechanics and Structural Analysis, University Carlos III of Madrid, Avda. de la Universidad 30, 28911 Leganés, Madrid, Spain
2  Engineering School of Metz (ENIM), Laboratory of Mechanic, Biomechanic, Polymer and Structures (LABPS), Ile du Saulcy, 57000 Metz, France

Published online: 15 September 2009

A numerical analysis on the thermo-viscoplastic behaviour of high strength structural steels when subjected to dynamic tension has been conducted. Using the calibration conducted by Nemat-Nasser and Guo [Mech. Mat. 35 (2003) 1023–1047] for DH-36 steel, the influence of the flow stress level and the strain hardening on necking formation and Critical Impact Velocity has been analysed. The numerical results obtained are compared with analytical predictions. Localization of necking and CIV values are directly linked to strain hardening parameters.

© EDP Sciences 2009