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Thermo-mechanical analysis of cold extrusion process using stream function and finite element methods

Hosseinabadi, H. G ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1108/15736101311329205
  3. Publisher: 2013
  4. Abstract:
  5. Purpose - The purpose of this paper is to propose a mathematical model to estimate required energy and temperature distribution during cold extrusion process. Design/methodology/approach - An admissible velocity field is generated based on stream function technique. Then, the required energy and the temperature distributions in the metal and the extrusion die are determined by a coupled upper bound-finite element analysis. Findings - To examine the proposed model, cold extrusion of AA6061-10%SiCp is considered and the predicted extrusion force-displacement diagrams in different reductions are compared with the experimental ones and reasonable agreement is observed. Furthermore, it is found that there is a linear relationship between maximum temperature and logarithm of ram velocity for the examined composite. Originality/value - This approach requires shorter run-time as compared with fully finite element analyses while the model is particularly appropriate for high speed extrusion processes where the adiabatic heating is of importance
  6. Keywords:
  7. Finite element analysis ; Mathematical modelling ; Upper bound theorem ; Cold extrusion ; Cold extrusion process ; Design/methodology/approach ; Force-displacement diagrams ; Linear relationships ; Stream function technique ; Thermo-mechanical analysis ; Upper bound theorems ; Finite element method ; Mathematical models ; Silicon carbide ; Temperature distribution ; Velocity ; Extrusion
  8. Source: Multidiscipline Modeling in Materials and Structures ; Volume 9, Issue 1 , 2013 , Pages 128-139 ; 15736105 (ISSN)
  9. URL: http://www.emeraldinsight.com/doi/abs/10.1108/15736101311329205