Naslov
Influence of methodology and selection of monotonic properties on estimation of cyclic stress-strain parameters of steels

Autori
Marohnić, Tea ; Basan, Robert ; Franulović, Marina

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 36th International Conference on Mechanics of Materials / Vormwald, Michael - Darmstadt : Technische Universitat Darmstadt - Institut fur Stahlbau und Werkstoffmechanik, 2015, 33-41

ISBN
978-3-939195-43-6

Skup
36th International Conference on Mechanics of Materials

Mjesto i datum
Sensbachtal, Njemačka, 23.02.2015. - 27.02.2015

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Cyclic loading; cyclic stress-strain curves; estimation; monotonic properties; cyclic parameters

Sažetak
This article presents the results of an investigation on the estimation of cyclic stress- strain curves and parameters (cyclic strength coefficient K', cyclic strain hardening exponent n') using two different approaches: the direct estimation from monotonic properties (in this case, ultimate strength Rm, yield stress Re and Rm/Re ratio) and the indirect approach where relations between monotonic properties and points on cyclic stress-strain curve are identified first and then new values of cyclic parameters K' and n' are obtained from them. Series of linear and nonlinear regression analyses with one or more independent variables were performed using 206 datasets for unalloyed, low- and high-alloy steels. The results obtained by both approaches were statistically evaluated by comparison of estimated and experimental values of cyclic yield stress Re'. Evaluation showed that the second approach is much more suitable for estimation of Re' which indicates that it could be used for more precise estimation of the cyclic parameters K' and n' as well. The analysis also confirmed that the consideration of different steel groups separately improves estimations of cyclic parameters and cyclic stress- strain curves.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA