EXPERIMENTAL STUDY AND MATHEMATICAL MODELING OF THE BEHAVIOR OF ST.3, 20KH13, AND 08KH18N10T STEELS IN WIDE RANGES OF STRAIN RATES AND TEMPERATURES
A. M. Bragov1, L. A. Igumnov1, V. B. Kaidalov2, A. Yu. Konstantinov1, D. A. Lapshin2, A. K. Lomunov1,3, F. M. Mitenkov2
1Research Institute for Mechanics, Nizhny Novgorod, 603950 Russia
bragov@mech.unn.ru
2Afrikantov Experimental Design Bureau for Mechanical Engineering, Nizhnii Novgorod, 603074 Russia
kaidalov@mail.ru
3Nizhny Novgorod State University of Architecture and Civil Engineering, Nizhny Novgorod, 603950 Russia
lomunov@mech.unn.ru
Keywords: диаграмма деформирования, скорость деформации, адиабатический нагрев, метод Кольского, математическая модель, идентификация, верификация, strain diagram, strain rate, adiabatic heating, Kolsky method, mathematical model, identification, verification
Abstract
Results of an experimental study of the behavior of St.3, 20Kh13, and 08Kh18N10T steels under static and dynamic loading are reported. The influence of the strain rate and temperature on characteristics of strength and plasticity is studied. Based on the data obtained, the parameters of the Johnson-Cook model are determined. This model is used in commercial software to describe the yield surface radius as a function of loading parameters. The adequacy of the identified model is verified in a series of special test experiments.
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