Finite Element Analysis of Effect of Back Pressure on Plastic Deformation in Equal Channel Angular Pressing
The finite element study is applied to analyze the effect of back pressure on deformation characteristics during a single pass of ECAP under different initial conditions with Deform-3D software.The results show that there are many beneficial effects of back pressure in expanding the deformation zone and enhancing the effective strain and deformation uniformity.At the same time,the greater the friction coefficient,the smaller the die internal angles and exterior angle,the bigger the extrusion force of ECAP and the higher the demands on the die structure under constant back pressure.