Laws of deformation processes and fracture of plastic steel from the point of view of dynamic overloading

Abstract

In this paper an attempt to compare the levels ofthe jumps of deformations and loadings is undertaken underthe influence of a powerful dynamic pulse of the setintensity in testing low-carbon steel, with a level of currentdamages of the material.The influence of the dynamic overloading whichare carried out at different stages of deformations, on kineticsof steel fracture is analysed in details.It is shown, that for the tested steel the most dangerousis the dynamic overloading which is carried out onyield drop and ultimate strength.On the basis of new experimental data two approachesfor modelling of the processes of deformationand fracture of plastic steel are offered and approved in theview of the influence of dynamic overloading.