Experimental Study and Numerical study of Pulsating Hydroforming of Tube in Box-Shaped Die

علوم کاربردی و محاسباتی در مکانیک

Article 4, Volume 21, Issue 1, February 2010, Pages 47-58   

Document Type: Original Article

DOI: 10.22067/fum-mech.v21i1.7708

Authors

mohsen Loh-Mousavi^{* 1}; Mohamad Bakhshi-Jooybari²; kan adchiro Mori³; Mahmod Farzin⁴; Jamal Hosseinipour²

¹Islamic Azad University, Khomeini Shahr branch

²Faculty of Mechanics, Mazandaran University

³Toyohashi University of Technology, Japan

⁴Isfahan University of Technology

Abstract

In recent years, the hydroforming has attracted the attention of the automotive industry due to reduction in weight and increase in strength of automotive parts. Thus, the knowledge of the process to produce parts with desired quality and accuracy has been growing. One of the effective methods in improving the formability in the hydroforming is known as pulsating hydroforming. However, the reason of improvement of the formability in pulsating hydroforming is still unclear for the closed-die hydroforming of tubes. In this study, the pulsating hydroforming of tube with box die was simulated by the finite element method to examine the effect of pulsating pressure on improvement of formability. In addition, the calculated results are compared with experimental results and it is shown that the improvement of the formability occurs before contact of the tube and die in expansion zone of the tube. Thus, it can be obtained from the results, that the main reason of improvement of the formability is due to the deformation behavior before start of contact of the tube and die. Flat bulging appears for the pulsating pressure in the former stage, whereas round bulging and wrinkling occur for the high and low non-pulsating pressures, respectively.

Keywords

Tube Hydroforming; Pulsating Pressure; Finite Element Simulation; Improvement of Formability of Tube

References