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A new model for prediction the strain field and extrusion pressure in ECAE process of circular cross section

Narooei, K ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1016/j.apm.2009.10.008
  3. Publisher: 2010
  4. Abstract:
  5. In this research in order to predict the strain distribution and extrusion load in equal channel angular extrusion (ECAE) process of circular cross section a new three dimensional kinematically admissible velocity field has been developed based on Bezier formulation. The strain distribution in deformation zone and the effects of various terms on extrusion load were determined. The results were compared both with the experimental and numerically predicted results reported in the literature. It was found that extrusion pressure decreases with increasing both the die angle and the outer curved corner angle and increases with increasing the friction coefficient. Also, it was exhibited that increasing the angle of outer curved corner increases the inhomogeniety of strain field of deformation zone. The predictions were in a good agreement with the FEM and experimental results reported by previous researchers for different die angles and frictional conditions
  6. Keywords:
  7. Equal channel angular extrusion (ECAE) ; Strain inhomogenity ; Bezier formulation ; Circular cross-sections ; Corner angle ; Deformation zone ; Die angle ; ECAE process ; Equal channel angular extrusion ; Extrusion load ; Extrusion pressure ; Friction coefficients ; Kinematically admissible velocity field ; New model ; Strain distributions ; Strain fields ; Upper bound analysis ; Velocity field ; Deformation ; Friction ; Three dimensional ; Velocity ; Extrusion
  8. Source: Applied Mathematical Modelling ; Volume 34, Issue 7 , 2010 , Pages 1901-1917 ; 0307904X (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0307904X09003278