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Strain field and extrusion load in ECAE process of bi-metal circular cross section

Narooei, K ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1016/j.apm.2011.08.008
  3. Publisher: 2012
  4. Abstract:
  5. In this paper the previous velocity field proposed by the authors for the prediction of strain field and deformation load of circular cross section billet in ECAE process has been extended to take into account the deformation behavior of bimetal circular billet in the same process. Accordingly, using Bezier method, as a robust method for determining the geometry of the streamlines, the strain field developed in the circular bimetal billet is calculated. Then, based on the kinematically admissible velocity and strain fields and using the upper bound theorem the ECAE load is predicted. It was found that at constant inner corner angle of ECAE die, with decreasing of outer curve corner the inhemogenity of strain distribution is decreased and the ECAE force is increased. Also, at a constant outer curve corner, by decreasing the inner corner angle, the extrusion load is increased. A good agreement was found between the predicted and experimental results
  6. Keywords:
  7. Bimetal ; Strain inhemogenity ; Bezier method ; Circular billet ; Circular cross-sections ; Corner angle ; Deformation behavior ; Deformation load ; ECAE ; ECAE process ; Extrusion load ; Kinematically admissible velocity field ; Robust methods ; Strain distributions ; Strain fields ; Upper Bound ; Upper bound theorems ; Velocity field ; Billets (metal bars) ; Bimetals ; Deformation ; Extrusion ; Velocity ; Metal extrusion
  8. Source: Applied Mathematical Modelling ; Volume 36, Issue 5 , 2012 , Pages 2128-2141 ; 0307904X (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0307904X11005087