20.500.12556/RUL-163901 Through-thickness work hardening variation in thick high strength steel plates a novel inverse characterization method Variabilnost preoblikovalnega utrjanja po globini pri debelih ploščah iz jekla visoke trdnosti: nova metoda inverzne karakterizacije Due to the production process, thick high strength steel plates potentially exhibit inhomogeneous plastic material behavior through the thickness. For example, the initial yield stress and work hardening behavior might vary through the plate thickness. In order to establish a reliable plasticity model that can be used in finite element simulations to optimize forming processes or to investigate the structural integrity of large structures, this material behavior needs to be characterized. A straightforward characterization method consists of slicing the thick high strength steel plate and conducting standard tensile tests. However, this approach comes with a large experimental effort. A novel specimen is proposed enabling to inversely identify the work hardening behavior at distinct locations through the thickness of a thick steel plate. To this end, a tensile specimen with circular pockets at different depths is used. The strain fields within the pockets are captured using digital image correlation (DIC). finite element model updating (FEMU) is used to inversely identify a predefined strain hardening law for each pocket. First, the procedure is optimized and numerically verified using virtual experiments generated by a finite element model with a known variation of the work hardening behavior. Finally, the procedure is experimentally validated by characterizing the strain hardening behavior of a 10 mm thick S690QL grade. through thickness strain hardening FEMU Nelder-Mead stereo-DIC S690QL thick high strength steel preoblikovalno utrjanje po globini FEMU Nelder-Mead stereo DIC S690QL debelo jeklo visoke trdnosti true false true Angleški jezik Slovenski jezik Članek v reviji 2024-10-14 09:25:27 2024-10-14 09:25:32 2024-10-16 03:23:59 0000-00-00 00:00:00 2024 0 0 Str. 417-425 no. 9/10 Vol. 70 Sept.-Oct. 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.1:669.1 0039-2480 10.5545/sv-jme.2024.1037 211347203 Through-thickness_Work_Hardening_Variation_in_Thick_High.pdf Through-thickness_Work_Hardening_Variation_in_Thick_High.pdf 1 5CB3858A44DAF58E7104EE2811FA78AE 1083d20dd168cd4b42803d975ebad3511d6781dc5dce5e85cc1368ad41441b45 7cf93864-89fd-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=193875 https://www.sv-jme.eu/sl/article/through-thickness-work-hardening-variation-in-thick-high-strength-steel-plates-a-novel-inverse-characterization-method/ 1 480c3951-89fd-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=193874 Fakulteta za strojništvo Strojniški vestnik 0 0 0