Determination of the flow curve based on the torsion of conical specimen

Identification of the large strain flow curve of high strength steel via the torsion test and FEMU

“…With FEMU, the goal is to minimize the discrepancy between the experimental and numerical data and hereby inversely identifying the sought hardening parameters [7], [14]. To compare both datasets, here the torque-angle curves, a cost function 𝐶𝐶(𝒑𝒑) is used:…”

“…Consequently, this work aims at extracting the post-necking work hardening behaviour of thick high-strength steel through a torsion test on a cylindrical bar. According to Petrov et al [7], the analytical methods lack accuracy and it is recommended to inversely post-process the experimental data acquired during a torsion test. For example, Gavrus et al [8] proposed a FEMU method to inversely identify the large strain flow curve.…”