Influance zones with variable frictional forces on the effort of the upsetting of rectangular strip
Abstract
The analyses of new solutions to determine of the contact stress in zones with variable frictional forces for upsetting the rectangular strip are executed. It is shown that replacement of the Mises precise plasticity condition by an approximate condition in terms of primary stress, changes the character of curves contact stresses in the slip and dead zones, and significantly influences on the dimensions of these zones. Conditions of existence of the slip and retardation zones on the contact surface of the deformation region in depending on the friction coefficient and the relative width of the strip are installed. A method for determining efforts of the upsetting for bizonal and three-zone curves of contact stresses is developed. Comparison of the results with known experimental and theoretical data has done. The estimation of error calculation effort of upsetting by the engineering method is obtained.
Keywords
About the Author
George BaranovRussian Federation
References
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For citations:
Baranov G. Influance zones with variable frictional forces on the effort of the upsetting of rectangular strip. Izvestiya. Ferrous Metallurgy. 2017;60(9).
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