Abstract
This work concerns the accurate modelling of plastic deformations in steel bars, loaded dynamically with impacts that cause “intermediate” strain rates (10-1 to 103s-1). The final aim is the description of permanent plastic deformations that are designed deliberately in a wide range of industrial processes, or occur accidentally under undesired overloads. The finite element method is used to perform reliable simulations of impact experiments that produce plastic bending in metal bars. The numerical model accounts for the actual experimental setup used in the experiments, including multiple contact interactions between intruder and deforming bar, rate effects, and friction. For comparative purpose, two different rate dependent constitutive laws are used to model the behaviour of the bar material. The results of the numerical simulations show a remarkable agreement with the experimental data. The validated model is used to conduct a sensitivity analysis, where the influence on the deformation process of test-rig geometry, friction, and constitutive parameters is evaluated.
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Gobbi, M., Mastinu, G., Munoz, L. et al. Numerical–experimental analysis of metal bars undergoing intermediate strain rate impacts. Comput Mech 43, 191–205 (2009). https://doi.org/10.1007/s00466-008-0279-x
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DOI: https://doi.org/10.1007/s00466-008-0279-x