Accumulation of Deformation in the Winding Circuit

Abstract

The formulas and an approximate analysis of the results of the accumulation of deformations in the operations of winding the wire into a spiral and unwinding it to its original state are given. The results of the experiment on winding a thin silver wire on the mandrel and unwinding it to its initial state are presented. The experiments on stretching the wire took place before and after the loading. It was revealed that under the test conditions the notional yield limit increases abruptly, relative elongation is reduced and tensile strength changes slightly. Comparison of load-extension diagrams before and after testing is given as well.


 


 


Keywords: wire, hardening, silver, stretching, winding, deformation, stress, mechanical properties.

References
[1] Yu. N. Loginov, S.L. Demakov, A.G. Illarionov, M.A. Ivanova, V.A. Romanov, Structural condition of copper wire rod, obtained during the continuous casting - Rolling process, J. Tsvetnye Metally 8 (2013) 87-92.


[2] A. A. Ershov, V.V. Kotov, Yu.N. Loginov, Capabilities of QForm-extrusion based on an example of the extrusion of complex shapes, J. Metallurgist 55 (2012) 695-701.


[3] L. Wang, Y. He, H. Zhao, H. Xie, S. Li, Y. Ren, G. Qin, Effect of cumulative strain on the microstructural and mechanical properties of Zn-0.02 wt% Mg alloy wires during room-temperature drawing process, Journal of Alloys and Compounds 740 (2018) 949-957.


[4] J. Zrnik, S.V. Dobatkin, L. Kraus, G.J. Raab, Prior structure modification on grain refinement and deformation behavior of medium carbon steel processed by ECAP, J. Steel Research Int. 84 (2013) 134.


[5] H. H. Lee, W. Kim, K.C. Jung, S. Seo, J.K. Lee, K.T. Park, H.S. Kim, Circumferential twisting during route B equal-channel angular pressing, Journal of Materials Processing Technology 259 (2018) 305-311.


[6] Yu. N. Loginov, S.P. Burkin, Evaluation of deformation and pressure irregularity in angle extrusion, J. Kuznechno-Shtampovochnoe Proizvodstvo 3 (2001) 29-34.


[7] A. Pougis, L.S. Tóth, O. Bouaziz, J.J. Fundenberger, D. Barbier, R. Arruffat, Stress and strain gradients in high-pressure tube twisting, J. Scripta Materialia 66 (2012) 773-776.