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 language | English (US) |
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Pages (from-to) | 260-266 |
Number of pages | 7 |
Journal | Journal of engineering for industry |
Volume | 112 |
Issue number | 3 |
DOIs | |
State | Published - Jan 1 1990 |