Using Coupled Eulerian-Lagransian Method in the Analysis of the High-speed Forming Process of Metal Plates with Female Die

Document Type : Impact Mechanics

Authors

1 Ph.D. Student, Faculty of Engineering, Imam Hossein University, Tehran, Iran

2 Professor, Faculty of Engineering, Imam Hossein University, Tehran, Iran

3 Corresponding author: Assistant Professor, Faculty of Engineering, Imam Hossein University, Tehran, Iran

4 Assistant Professor, Faculty of Engineering, Imam Hossein University, Tehran, Iran

5 Assistant Professor, Faculty of Mechanical Engineering, University of Eyvanekey, Eyvanekey, Iran.

Abstract

In this article, the numerical simulation of the behavior of metallic plates in the process of high-speed forming with female die is discussed. Also, the repeated underwater explosive loading was applied to the sample so that 4 and 8 gr of explosive charge were used in the 1st and 2nd blast, respectively. In the following, the Coupled Eulerian-Lagrangian method along with Johnson-Cook viscoplasticity model was used for the numerical simulation of the process. The numerical model was validated using the experiments conducted in Ref [1]. It was shown that the numerical model well shows the deformation profile as well as the thickness distribution in the longitudinal direction of the plate. Using the validated numerical model, quantities such as changes in horizontal deformation velocity and vertical deformation velocity, pressure, stress and JC damage criteria in the radial direction of the plate were investigated. The results showed that unlike the results obtained for explosive forming in the previous references, the test specimen in the 1st and 2nd blasts after passing through the transient deformation area does not undergo fluctuations or so-called springback phenomenon and its value quickly approaches the maximum amount (depth of the female die). Also, after hitting the die, the plate does not experience the reverse deformation or reduction of the deformation. The cause of this issue can be found in the appropriate selection of the amount of the charge mass of the and also the use of the female die. Therefore, it is very efficient to use the idea of a female die without central venting hole for forming metals under repeated underwater explosive loading.

Graphical Abstract

Using Coupled Eulerian-Lagransian Method in the Analysis of the High-speed Forming Process of Metal Plates with Female Die

Highlights

  • Numerical simulation of the behavior of metallic plates in the high-speed forming process with a female die
  • No observation on the fluctuations and the phenomenon of springback after the transient deformation of the sample
  • No observation of reverse deformation or reduction of central deformation in repeated loading

Keywords

Main Subjects



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Volume 21, Issue 1 - Serial Number 79
Serial No. 79, Spring Quarterly
June 2025
Pages 1-27
  • Receive Date: 09 April 2024
  • Revise Date: 29 April 2024
  • Accept Date: 11 May 2024
  • Publish Date: 22 May 2025