Upper-bound analysis for backward extrusion of generally non-axisymmetric hollow shapes

Rong-Shean Lee, Chin Tarn Kwan

Research output: Contribution to journalArticlepeer-review

Abstract

A kinematically admissible velocity field suitable for backward extrusion of generally non-axisymmetric hollow shapes is proposed. By using the proposed velocity field, the upper-bound extrusion load and average extruded height for internally elliptic-shaped tubes from rectangular-shaped billets, internally regular polygonal-shape tubes from the similar shaped billets and internally trochoidal gear-shaded tubes from the similar shaped billets, are determined with respect to chosen parameters. Experiments were carried out with commercial pure aluminum and aluminum alloy billets at room temperature using various shaped punches. Both the extrusion load and average extruded height between the theory and experiment are shown to agree well for validating the proposed velocity field.

Original languageEnglish
Pages (from-to)163-173
Number of pages11
JournalJournal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao
Volume18
Issue number2
Publication statusPublished - 1997 Apr 1

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Upper-bound analysis for backward extrusion of generally non-axisymmetric hollow shapes'. Together they form a unique fingerprint.

Cite this