Deforming division and visualization in plastic bulk forming process

For the complex and hard analysis of metal flow behaviors in plastic bulk forming process, a deformation division method of using the second invariant of the deviatoric stress tensor J₂ and Lode parameter μ_σ is put forward from the view of plastic mechanics. Quantitative analysis on the plastic zone and the strain type of material can be conducted. Through a second development, the visualization of plastic bulk forming process is realized, which can directly describe the quantitative distribution rule of stress and strain in any plastic regions.