Numerical Estimation of Frictional Effects in Equal Channel Angular Extrusion

• Aguiar de Souza Vinicius

  National Institute for Materials Science (NIMS)

• Watanabe Ikumu

  National Institute for Materials Science (NIMS)

• Yanagida Akira

  National Institute for Materials Science (NIMS)

Abstract

The purpose of this study is to numerically estimate the friction coefficient for equal channel angular extrusion with and without back pressure. Three-dimensional finite element analysis is employed to estimate the coefficient of friction from the maximum pressing load, a crucial variable in die design. The finite element model consists of a billet, a plunger, a ram, and a die, where the interface between the billet and the die is modeled by the Coulomb friction model with truncated shear stress. The numerical model was validated by comparing the grid deformation patterns in the extrusion symmetry plane, and by comparing the load versus stroke curves for the ram (pressing load) and for the plunger (back pressure). Results indicate that the coefficient of friction can be accurately estimated from the maximum pressing load, but it is necessary to modify the traditional Coulomb friction model.

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 57 (9), 1399-1403, 2016

  The Japan Institute of Metals and Materials

Keywords

• equal channel angular extrusion
• finite element analysis
• friction model

Details

• CRID: 1390282679231435904
• NII Article ID: 130005289894
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.mh201513
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 027571020
• Web Site: https://mdr.nims.go.jp/pid/264b4774-e9cc-444a-9d50-5df2b5a77248
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I027571020
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/57/9/57_MH201513/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
  • MDR
• Abstract License Flag: Disallowed