Naslov
Suitability of Constitutive Laws for Structural Aluminum Alloys

Autori
Dokšanović, Tihomir ; Džeba, Ivica ; Markulak, Damir ; Skejić, Davor

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, prošireni sažetak, znanstveni

Izvornik
Proceedings of 14th INALCO2019 / - Tokyo : Japan Light Metal Welding Association ; Japan Aluminium Association, 2019, 134-135

ISBN
978-4-60000060-8

Skup
14th International Aluminium Conference (INALCO 2019)

Mjesto i datum
Tokyo, Japan, 13.11.2019. - 15.11.2019

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
constitutive equations ; numerical analysis ; statistics ; suitability testing ; round-house type material ; nonlinear behaviour

Sažetak
Continuing development of aluminium alloys highlights the problem of choosing adequate constitutive stress-strain relationships, especially as aluminium has no pronounced yield strength and a significant degree of nonlinearity before reaching the 0.2% proof strength. Thus, for the sake of a more realistic approximation of the stress-strain relation more complex models are required. These complex models are continuous, defined either as a function of stress or strain. Unfortunately, basic mechanical properties available to engineers are often not adequate for material behaviour modelling in nonlinear numerical analysis, which are required for intricate design problems. Moreover, studies regarding suitability of various models are scarce. Since any deviations from experimental stress-strain behaviour consequently introduces errors in simulation results, it is necessary to quantify errors, and to enable a reliable choice among available models, depending on type of modelled phenomena. To gain insight on these problems, own experimental stress- strain data of coupons from alloys EN AW-6082-T6 and EN AW-6060-T66 was utilized. Alloys were selected as being representative of a group of commonly used alloys in structural engineering (T5, T6, and T66), due to their similar shape of the stress-strain curve. Experimental curves were divided into two zones, the dominantly elastic and plastic, and relative errors between six constitutive laws and experimental data by zone and in total behaviour were established. Descriptive and dispersion statistics of determined relative errors allowed for quantitative indicators of suitability, which then allowed for conclusions regarding choice of tested constitutive relationships.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

POVEZANOST RADA