A new Approach for experimental evaluation of contact stresses
Citation:
R.Lupoi and F.Osman, A new Approach for experimental evaluation of contact stresses, AMPT 2005, Wisla (Poland), 2005, 1 - 4Download Item:
Abstract:
n metal forming operations, t
he intensity and distribution o
f stresses at the
tool/material interface have great influence on the pattern and mode of deformation. This is
due to the effect of frictional forces in being resistive to material movements and hence
affects material flow and the directionality of volume
distribution of material inside die
cavities. This paper explores the use of the pressure pin technique for the measurement of
tool stresses at the interface between the tool and the deforming workpiece material. It also
introduces a new experimental meth
odology for the measurement of stresses where the
measuring device is concealed inside the tool and not subjected to the severe conditions at the
interface surface. Each tool containing measuring devices is split into two parts, one part has
the shape to b
e formed (industrial die), while the second part includes the pressure pin
measuring column.
Friction resistance and friction coefficient are evaluated across the billet
surface and at different stages of deformation
.
Author's Homepage:
http://people.tcd.ie/lupoir
Author: LUPOI, ROCCO
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AMPT 2005Type of material:
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Full text availableKeywords:
Pressure pin, Interface Friction, Tool Stresses, Contact StressesMetadata
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