Investigating the effect of friction coefficient on the forming force of copper sheet in the pressing process in bound groove molds

Document Type : Original Article

Authors
Department of Mechanical Engineering , University of Birjand , Tehran University , Iran.
Abstract
Extreme plastic deformation methods are methods that can be used to produce materials with a high strength-to-weight ratio. Groove pressing process is a severe plastic deformation method used to produce metal sheets with very fine grain structure. In this research, numerically and using the finite element method, the groove pressing process is studied up to one full pass on a pure copper sample. Therefore, numerical modeling was done by ABAQUS 6-14 software, and by using this method, the output results of each stage are transferred as input to the next stage. Numerical results showed that with the application of each step of the process (Constrained Groove Pressing), the amount of plastic strain increases and also along the length of the sample, the amount of effective plastic strain changes in an oscillating manner. By examining the changes in the forming force during the process, the trend of force changes was observed. It consists of three parts in odd stages, and in the third part, the slope of force changes increases sharply, which is due to the increase of contact surfaces and the effect of friction in order to fill the corners of the mold. By examining the effect of the friction coefficient on the forming force, it was observed that with the increase of the friction coefficient, the maximum value of the forming force increases.
Keywords
Subjects

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Volume 2, Issue 2 - Serial Number 3
February 2023
Pages 79-89

  • Receive Date 07 May 2024
  • Revise Date 13 September 2024
  • Accept Date 17 February 2024
  • First Publish Date 17 February 2024
  • Publish Date 21 January 2024