Investigation of Geometrical and Physical Parameters of Aluminum Tube Electromagnetic Bead Forming byFinite Element

Electromagnetic forming is a high energy rate formingprocess in which the electromagnetic body forces (Lorentzforces) are used to produce metallic parts. In this researchwork, the effective process parameters such as dischargevoltage, clearance between the tube and die, frictioncoefficient, wall thickness and length of the tube werestudied by using finite element technique. In addition,design of experiment was applied for optimizing thenumber of operations. In order to generate a pressure onthe workpiece, the governing equations were used in theform of a subroutine in a Fortran Program. In thisanalysis, an axial-symmetric model was used and Johnson-Cook theory was applied due to high strain rate to show theplastic behavior of materials. Finally, the numerical resultswere studied by details. The results have shown that, theradial displacement increases with the increase of thedischarge voltage and clearance between the tube and die.

کلیدواژه ها:

Electromagnetic Forming ، Finite Element ، Johnson Cook