PLASTIC RESOURCE OF LOW-CARBON STEEL DURING IN TECHNOLOGICAL PROCESS OF DEEP DRAWING
- 1 Institute of Mechanics, Bulgarian Academy of Sciences, Bulgaria
The present study deals with the development of a method involving physical experiment and numerical simulation. The aim is to predict the possibility of maximal use of the plastic resource of a low-carbon steel circular blank subjected to deep drawing. The material hardening curve under uniaxial tension was found experimentally. A series of real physical experiments of deep drawing were carried out. FEM-simulation of the experimentally observed material mechanical behaviour was performed. The variation of the parameters of the stress-strain state in selected areas of the blank volume is shown accounting for the advance of the blank shape transformation.
The reported results could be used to assess of the residual plastic resource of quality steel products, and to investigate and predict the deformation process development in such material. Thus, stability loss during blank form-change or plastic strain localization could be prevented.