ANALYTICAL AND NUMERICAL STUDY OF TUBE DRAWING THROUGH A CONICAL DIE

Abstract

Tube drawing are one of the most important forming processes manufacturing whole board. This process suffers from many problems regarding the deformation behavior of the tube material, as there is no control on the inner radius, i.e. wall thickening and failure at the end. This research involved implementing analytical and numerical simulation to investigate the ability of the tube to resist the failure under applied forces. The mathematical analysis was performed using Tresca yield criterion and the basis of force equilibrium to a representative element in the deformation zone, as it being drawn into the die under quasi-static equilibrium. Explicit dynamic analysis to the tube drawing process was performed using ANSYS 19.2 Workbench program. The analytical solution was used to validate the finite element results obtained from ANSYS program. Two types of material used in this analysis. The die material is made by 304 stainless steel. However, AL2024T351 was selected as tube material. The developed longitudinal stress and the thickness strain drawing process of the tube through conical die are studied. Investigated parameters that can affect the deformation behavior are taken into account. Such as, the die semi-angle (α) and the die-tube friction coefficient (μ). It can be observed the very small die semi-angle for all values of die- coefficient of friction leads to a high contact length between the die and tube and this cause the longitudinal stress increase.On the other hand, there are increase in thickness strain with increase in die semi-angle. Finally,it is found that a good agreement between the analytically and the numerically (ANSYS) solutions in the overall trend for all results obtained, stresses and strains.

Keywords

• tube drawing
• tube sinking: analysis
• fea.