Numerical Investigation and Optimization of Die Parameters in Parallel Tubular Channel Angular Pressing Process

Subject Areas : Optimization

Amin  Armanian ¹ (MSc Student, Department of Mechanic Engineering, Azad Islamic University, Khomeinishahr Branch, Khomeinishahr/Isfahan, Iran.)
Hassan  khademi zadeh ² (Assistant Professor, Department of of Mechanic Engineering, Azad Islamic University, Khomeinishahr Branch, Khomeinishahr/Isfahan, Iran.)

Received: 2017-09-26 Accepted : 2017-11-21 Published : 2018-01-10

Keywords: Finite Element Simulation, Severe Plastic Deformation, Parallel Tubular Channel Angular Pressing, ultra-fine materials,

Abstract :

In this day and age, the ultra-fine materials due to their unique properties have found a special place in various industries. By reducing the grain size, the share of atoms at the grain boundaries has been increased and the increase of grain boundaries prevents the movement of dislocations and increases the strength. One method of producing ultra-fine materials is imposing severe plastic deformation. In order to apply Plastic deformation, disparate methods can be used that parallel angled channels are used in this study. ABAQUS finite element software is used to analyze the process numerically and to optimize the results, neural network and genetic algorithm methods have been used. In this study, the effects of die parameters including channel angle, tube length, increase of diameter difference and the friction coefficient are checked out. The results depicted that the coefficient of friction and pipe length which are tested, played a pivotal role in the homogenization of strain distribution separately; that by increasing the supposed friction coefficient and reducing the length of the tube, the strain distribution will be homogeneous. The difference between the increase in the diameter of pipe and the angle of die’s channel will have little impact on the improved uniformity of strain distribution. On the other hand, increasing the coefficient of friction, pipe length and diameter of pipe ends with an increase in the force of process while increasing the angle of die’s channel culminated in reducing the formation force. Additionally, considering the results obtained from optimization of parameters,