Identification of Ductile Damage Parameters for Austenitic Steel

Authors: J. Dzugan, M. Spaniel, P. Konopík, J. Ruzicka, J. Kuzelka

Abstract:

The modeling of inelastic behavior of plastic materials requires measurements providing information on material response to different multiaxial loading conditions. Different triaxiality conditions and values of Lode parameters have to be covered for complex description of the material plastic behavior. Samples geometries providing material plastic behavoiur over the range of interest are proposed with the use of FEM analysis. Round samples with 3 different notches and smooth surface are used together with butterfly type of samples tested at angle ranging for 0 to 90°. Identification of ductile damage parameters is carried out on the basis of obtained experimental data for austenitic stainless steel. The obtained material plastic damage parameters are subsequently applied to FEM simulation of notched CT normally samples used for fracture mechanics testing and results from the simulation are compared with real tests.

Keywords: baqus, austenitic steel, computer simulation, ductile damage, triaxiality

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1070851

References:

[1] N. Bonora, D. Gentile, A. Pirondi, G. Nowaz, Ductile damage evolution under triaxial state of stress: theory and experiments, International Journal of Plasticity 21 (2005), pp. 981-1007.
[2] Y. Bai, T. Wierzbicki, Application of extended Mohr-Coulomb criterion to ductile fracture, Int J Fract (2010) 161, pp.1-20.
[3] Y. Bai, T. Wierzbicki, A new model of metal plasticity and fracturewith pressure and Lode dependence, International Journal of Plasticity 24 (2008), pp. 1071-1096
[4] T. Wierzbicki et al., Calibration and evaluation of seven fracture models, International Journal of Mechanical Sciences 47 (2005), pp. 719-743.
[5] Y. Bao, T. Wierzbicki , A Comparative Study on Various Ductile Crack Formation Criteria, Transactions of the ASME, Vol. 126, JULY 2004, pp. 314-324.
[6] Y. Li, T. Wierzbicki, Mesh-size Effect Study of Ductile Fracture by Non-local Approach, Proceedings of the SEM Annual Conference June 1-4, 2009 Albuquerque New Mexico USA,
[7] J. D. Seidt, Plastic Deformation and Ductile Fracture of 2024-T351 Aluminum under Various Loading Conditions, Dissertation, Graduate Program in Mechanical Engineering, The Ohio State University, 2010.
[8] M. Brunig, O. Chyra, D. Albrecgt, L. Dreimeier, M. Alves, A ductile damage criterion at various stress triaxialities, International Journal of Plasticity 24 (2008), pp. 1731-1755
[9] D. Celentano, P. Tapia, J. Chaboche, EXPERIMENTAL AND NUMERICAL CHARACTERIZATION OF DAMAGE EVOLUTION IN STEELS, Mecanica Computacional Vol. XXIII, G.Buscaglia, E.Dari, O.Zamonsky (Eds.), Bariloche, Argentina, November 2004, pp.1-14.