Coupled Model of FRacture of Elastoplastic Materials Based on a Kinetic Equation of Damage Accumulation and the Pisarenko-Lebedev Strength Criterion
V. G. Bazhenov1, S. L. Osetrov1, D. L. Osetrov1, A. A. Ryabov2
1Scientific-Research Institute of Mechanics, Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, 603950, Russia
2All-Russian Scientific Research Institute of Experimental Physics, Sarov, 607188, Russia
Keywords: true strain diagram, coupled fracture model, strength criterion, kinetic equation of damage accumulation
Abstract
A coupled fracture model is proposed and implemented to investigate the deformation and fracture of elastoplastic materials. The fracture model parameters are determined by constructing true fracture strain diagrams and determining the limiting characteristics of 12Kh18N10T and 10KhSND steel. Numerical simulation results for the fracture of cylindrical rods under tension are presented. It is revealed that the type and nature of tensile fracture of cylindrical samples determined in the calculations are in good agreement with the experimental data.
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