Upper bound analysis of differential velocity sideways extrusion process for curved profiles using a fan-shaped flow line model

Wenbin Zhou, Zhusheng Shi (Lead / Corresponding author), Jianguo Lin

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)
36 Downloads (Pure)

Abstract

An analytical model for predicting the shapes of rectangular bars with variable curvatures along their lengths through a novel forming method, differential velocity sideways extrusion (DVSE), previously proposed by the authors, has been developed on the basis of the upper bound method. A new flow line function was presented to describe its deformation field. The plastic deformation zone (PDZ) was assumed to be fan-shaped, where the trajectory of the material flow within the PDZ had an elliptic shape. The proposed continuous flow line function was validated using finite element simulations. The flow patterns, extrusion pressure, curvature, and effective strain predicted by the analytical solutions agreed well with modelling results. Compared to the classical discontinuous simple shear model of channel angular extrusion (CAE) with a 90° die, the new approach was shown to predict the effective strain more closely.

Original languageEnglish
Pages (from-to)21-32
Number of pages12
JournalInternational Journal of Lightweight Materials and Manufacture
Volume1
Issue number1
Early online date26 Mar 2018
DOIs
Publication statusPublished - Mar 2018

Keywords

  • Bending
  • Continuous flow line function
  • Curvature
  • Extrusion
  • Section profiles
  • Upper bound method

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Industrial and Manufacturing Engineering

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