Naslov
Validation of elastic and identification of plastic parameters of Johnson-Cook law using DIC

Autori
Tomičević, Zvonimir ; Hild, François ; Kodvanj, Janoš ; Roux, Stéphane

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

Izvornik
Proceedings of the 30th Danubia-Adria Symposium on Advances in Experimental Mechanics / Alfirević, Ivo ; Semenski, Damir - Zagreb : Croatian society of mechanics, 2013, 213-214

ISBN
978-953-7539-17-7

Skup
30th Danubia-Adria Symposium on Advances in Experimental Mechanics

Mjesto i datum
Primošten, Hrvatska, 25.09.2013. - 28.09.2013

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
identification; elasto-plastic behaviour; regularisation; digital image correlation; biaxial experiment

Sažetak
Nowadays, the identification and validation of constitutive laws with a high degree of reliability is an important demand from industry so as to apprehend safety factors in a rational manner. Full-field measurement techniques open the way to such an efficient and secure determination of constitutive parameters. In the present case, nodular graphite cast iron was chosen as the studied material. In this paper the identification of plastic parameters of Johnson-Cook law is performed from the analysis of biaxial tests. Two different loading paths are considered, namely, proportional equibiaxial and non-proportional "snail" histories. During the tests, images of the region of interest are taken. Displacement fields are measured via Digital Image Correlation (DIC). Boundary values of this measured displacement are prescribed in a FE modeling of the same test. Minimizing the difference between the measured and simulated displacement fields by tuning the plastic parameters is the strategy followed herein to identify the quasi-static part of Johnson-Cook’s law.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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