True stress-strain curves of HSLA steel welded joint regions were estimated by using numerical simulation of strains measured by DIC and special iteration procedure to match the results. Strains were measured at certain level of loading in all regions of welded joint with different tensile properties, namely base metal (BM), weld metal (WM) and two subzones of Heat-Affected-Zone (fine grain, FGHAZ, and coarse grain CGHAZ). By converting engineering stress (load divided by initial cross section area) into true stress, experimental true stress-true strain curves are obtained and used as initial iteration for the Finite Element Method (FEM) simulation, after being fitted by the power law relation for stress-strain curves. Obtained results are then compared with the experimental results to fmd the differences and make appropriate correction in power law curves and make as many iterations as needed before the differences become small enough. This procedure has been verified by an example of... welded tensile panel.
Keywords:
Fatigue crack / finite element method / welded joint zones / pressure vessel steel
Source:
1st Virtual European Conference on Fracture - Vecf1, 2020, 28, 1992-1997
TY - JOUR
AU - Younise, B.
AU - Sedmak, A.
AU - Milosevic, N.
AU - Rakin, Marko
AU - Međo, Bojan
PY - 2020
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4752
AB - True stress-strain curves of HSLA steel welded joint regions were estimated by using numerical simulation of strains measured by DIC and special iteration procedure to match the results. Strains were measured at certain level of loading in all regions of welded joint with different tensile properties, namely base metal (BM), weld metal (WM) and two subzones of Heat-Affected-Zone (fine grain, FGHAZ, and coarse grain CGHAZ). By converting engineering stress (load divided by initial cross section area) into true stress, experimental true stress-true strain curves are obtained and used as initial iteration for the Finite Element Method (FEM) simulation, after being fitted by the power law relation for stress-strain curves. Obtained results are then compared with the experimental results to fmd the differences and make appropriate correction in power law curves and make as many iterations as needed before the differences become small enough. This procedure has been verified by an example of welded tensile panel.
T2 - 1st Virtual European Conference on Fracture - Vecf1
T1 - True Stress-strain Curves for HSLA Steel Weldment - Iteration Procedure Based on DIC and FEM
EP - 1997
SP - 1992
VL - 28
DO - 10.1016/j.prostr.2020.11.023
ER -
@article{
author = "Younise, B. and Sedmak, A. and Milosevic, N. and Rakin, Marko and Međo, Bojan",
year = "2020",
abstract = "True stress-strain curves of HSLA steel welded joint regions were estimated by using numerical simulation of strains measured by DIC and special iteration procedure to match the results. Strains were measured at certain level of loading in all regions of welded joint with different tensile properties, namely base metal (BM), weld metal (WM) and two subzones of Heat-Affected-Zone (fine grain, FGHAZ, and coarse grain CGHAZ). By converting engineering stress (load divided by initial cross section area) into true stress, experimental true stress-true strain curves are obtained and used as initial iteration for the Finite Element Method (FEM) simulation, after being fitted by the power law relation for stress-strain curves. Obtained results are then compared with the experimental results to fmd the differences and make appropriate correction in power law curves and make as many iterations as needed before the differences become small enough. This procedure has been verified by an example of welded tensile panel.",
journal = "1st Virtual European Conference on Fracture - Vecf1",
title = "True Stress-strain Curves for HSLA Steel Weldment - Iteration Procedure Based on DIC and FEM",
pages = "1997-1992",
volume = "28",
doi = "10.1016/j.prostr.2020.11.023"
}
Younise, B., Sedmak, A., Milosevic, N., Rakin, M.,& Međo, B.. (2020). True Stress-strain Curves for HSLA Steel Weldment - Iteration Procedure Based on DIC and FEM. in 1st Virtual European Conference on Fracture - Vecf1, 28, 1992-1997.
https://doi.org/10.1016/j.prostr.2020.11.023
Younise B, Sedmak A, Milosevic N, Rakin M, Međo B. True Stress-strain Curves for HSLA Steel Weldment - Iteration Procedure Based on DIC and FEM. in 1st Virtual European Conference on Fracture - Vecf1. 2020;28:1992-1997.
doi:10.1016/j.prostr.2020.11.023 .
Younise, B., Sedmak, A., Milosevic, N., Rakin, Marko, Međo, Bojan, "True Stress-strain Curves for HSLA Steel Weldment - Iteration Procedure Based on DIC and FEM" in 1st Virtual European Conference on Fracture - Vecf1, 28 (2020):1992-1997,
https://doi.org/10.1016/j.prostr.2020.11.023 . .
