Journal ArticleDOI
Rate effects in steady forming processes of plastic materials
TLDR
In this paper, an analysis of drawing and extrusion processes of viscoplastic solids through wedge-shaped and conical dies is presented, and explicit expressions for the stress field within the working zone are derived.About:
This article is published in International Journal of Mechanical Sciences.The article was published on 1984-01-01. It has received 11 citations till now. The article focuses on the topics: Bingham plastic & Stress field.read more
Citations
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Journal ArticleDOI
Steady forming processes of plastic materials with their rotation
TL;DR: In this article, the processes of extrusion and drawing of plastic solids through conical dies during rotation of solids are analyzed and the possibility to change and regulate the extrusion force by rotating is considered.
Journal ArticleDOI
On generalized radial flow patterns of viscoplastic solids with some applications
TL;DR: In this paper, the velocity profiles and the stresses are not restricted by the usual assumptions of plane-strain or axially symmetric behaviour, however, the shear stresses, induced by wall friction, are small in comparison with the effective stress.
Journal ArticleDOI
On some simple steady forming process of viscoplastic solids
TL;DR: In this article, the Eulerian strain rate is the sum of a plastic part and a viscous part, and the problem is reduced to a single non-linear differential equation.
Journal ArticleDOI
The dynamics of fast metal forming processes
Jehuda Tirosh,D. Iddan +1 more
TL;DR: In this paper, the authors present a procedure to assess, by an approximate lower bound, the dynamic stress distribution that prevails in the deforming zone during fast forming processes, based on the magnitude of three dimensionless groups which characterize dynamic plasticity.
Journal ArticleDOI
An Accurate Upper Bound Solution for Plane Strain Extrusion through a Wedge-Shaped Die
TL;DR: An upper bound method for the process of plane strain extrusion through a wedge-shaped die is derived and two specific upper bound solutions are found using the method derived.
References
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Journal ArticleDOI
Plane-strain radial flow of plastic materials
David Durban,Bernard Budiansky +1 more
TL;DR: In this paper, a closed-form solution for plane-strain radial flow of a rigid/linear-hardening material is given for sheet drawing and the applicability of the solution to sheet drawing or extrusion is discussed.
Journal ArticleDOI
Axially Symmetric Radial Flow of Rigid/Linear-Hardening Materials
TL;DR: In this paper, a closed-form solution for axially symmetric radial flow of rigid/linear-hardening materials is proposed, assuming that the materials obey the von Mises flow rule and that the flow field is in steady state.
Journal ArticleDOI
Drawing through conical dies—An analysis compared with experiments
TL;DR: In this paper, a drawing theory for drawing through conical converging dies, in which the speed of the process is an essential parameter, was proposed and an explicit formula for the drawing stress is obtained.
Journal ArticleDOI
Radial flow simulation of drawing and extrusion of rigid/hardening materials
TL;DR: In this article, a combination of rigorous relations (drawn from continuum plasticity) with pragmatic engineering arguments, leads to new approximate formulae for the stress fields and velocity profiles in some basic steady forming processes.