The paper presents an automated numerical method for acquiring true stress-strain relationship from the material test results of high-strength steels. The model beyond uniform load is iterated to produce load-displacement relationship matching the experimental results re-calculated by finite element method. We have used this approach to evaluate coupon tests of high-strength grades S700 and S960, and extended the study to mild steels S275 and S355 for comparison. The results were validated against the tensile experiments of plates with central hole made from the same steel S960 as original coupons. The presented algorithm will serve as a basis for evaluation of ductility limits for different steel grades.
|Title of host publication||Proceedings of The 13th Nordic Steel Construction Conference (NSCC-2015)|
|Editors||Markku Heinisuo, Jari Mäkinen|
|Publisher||Tampere University of Technology|
|Publication status||Published - 2015|
|Event||Nordic Steel Construction Conference 2015 - Tampere, Finland|
Duration: 23 Sep 2015 → 25 Sep 2015
|Conference||Nordic Steel Construction Conference 2015|
|Period||23/09/15 → 25/09/15|
Hradil, P., & Talja, A. (2015). True stress-strain relationship for finite element simulations of structural details under diffuse necking. In M. Heinisuo, & J. Mäkinen (Eds.), Proceedings of The 13th Nordic Steel Construction Conference (NSCC-2015) (pp. 229-230). Tampere University of Technology.