Approximate model to calculate foldover and strains during cold upsetting of cylinders. Part I. Formulation and evaluation of the foldover model

O. M. Ettouney, K. A. Stelson

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

In this paper, a new approximate model to calculate foldover of a cylinder undergoing nonuniform compression test (simple upsetting) is presented. The model is formulated using constant-volume equations and workpiece geometry. In addition to foldover, the model can be used to calculate equatorial-axial strains. This eliminates the need for inscribing grids (when determining forming-limit diagrams) on the cylinder's free surface to find these strains. Combined with friction-calibration curves (prepared using finite-element analysis) that relate foldover to friction, the model enables one to estimate the friction coefficient.

Original languageEnglish (US)
Pages (from-to)260-266
Number of pages7
JournalJournal of engineering for industry
Volume112
Issue number3
DOIs
StatePublished - Jan 1 1990

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