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A new upper bound solution for the analysis of the twist extrusion process with an elliptical die cross-section

Salehi Seyed, M ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. DOI: 10.1243/09544062JMES1318
  3. Publisher: 2009
  4. Abstract:
  5. The twist extrusion process is a rather new route to produce highly strained materials. In this process, severe plastic deformation is applied by large shear strains. In this regard, prediction of materials behaviour and extrusion pressure is of importance to die designers and engineers. In this article, utilizing an admissible velocity field together with the upper bound technique, the required energy for twist extrusion is predicted. The proposed model is capable of considering the effect of various parameters such as die geometry and friction conditions. In addition, the model anticipates the critical die design parameters. To verify the proposed model, the predictions are compared with the results of a finite-element analysis and reasonable consistency is observed. © 2009 IMechE
  6. Keywords:
  7. Severe plastic deformation ; Twist extrusion ; Upper bound technique ; Velocity field ; Die design ; Die geometry ; Extrusion pressure ; Finite element analysis ; Friction conditions ; Highly strained ; Large shear ; Severe plastic deformations ; Upper Bound ; Upper bound solution ; Extrusion dies ; High energy forming ; Plastics ; Plastic deformation
  8. Source: Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science ; Volume 223, Issue 9 , 2009 , Pages 1975-1981 ; 09544062 (ISSN)
  9. URL: https://journals.sagepub.com/doi/10.1243/09544062JMES1318