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This paper demonstrates a new method to extract the friction stress τ from measurements in wire drawing. It is based on simultaneous measurement of drawing force and die temperature; an analytical thermo-mechanical model of the wire drawing operation is used to separate the plastic work W pl from the frictional work. Thanks to the exploitation of the temperature measurement, the necessity...
The analysis of the plane isothermal flow of a thin pseudoplastic film with the viscosity index m is performed. The Reynolds equation related to the Newtonian case (m=1) is changed in a system of two equations, one giving the location of the zero shear stress, the other the pressure gradient. This system is applied to the analysis of the lubrication of the wire drawing with a cylindrical nozzle. We...
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