Mahalov M.S. et. al. 2018 Vol. 20 No. 4

OBRABOTKAMETALLOV Vol. 20 No. 4 2018 18 TECHNOLOGY References 1. Suslov A.G., Blyumenstein V.Yu., Gurov R.V., Isaev A.N., Odintsov L.G., Pleshakov V.V., Fedorov V.V., Shneider Yu.G. Tekhnologiya i instrumenty otdelochno-uprochnyayushchei obrabotki detalei poverkhnostnym plasticheskim deformirovaniem . V 2 t. T. 1 [Technology and tools of finishing and hardening treatment of parts by surface plastic deformation. In 2 vol. Vol. 1]. Moscow, Mashinostroenie Publ., 2014. 480 p. ISBN 978-5-94275-710-6. 2. Suslov A.G., Babichev A.P., Kirichek A.V., Ovseenko A.V., Motrenko P.D., Ambrosimov S.K., Afonin A.I., Gurov R.V., Prokof’ev A.N., Solov’ev D.A. Tekhnologiya i instrumenty otdelochno-uprochnyayushchei obrabotki detalei poverkhnostnym plasticheskim deformirovaniem . V 2 t. T. 2. [Technology and tools of finishing and hardening Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2018 vol. 20 no. 4 pp. 6–20 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2018-20.4-6-20 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov Surface Plastic Deformation Mechanics. The Hardenable Elastic-Plastic Body Model Maxim Mahalov a, * , Valeriy Blumenstein b Kuzbass State Technical University named after T.F. Gorbatchev, 28 Vesennaya st., Kemerovo, 650000, Russian Federation a https://orcid.org/0000-0002-3266-9724, maxim_ste@mail.ru, b http://orcid.org/0000-0002-3711-1535 , blumenstein@rambler.ru ARTICLE INFO Article history : Received: 08 August 2018 Revised: 21 August 2018 Accepted: 22 October2018 Available online: 15 December 2018 Keywords : Residual stresses Metal mechanical condition Technological inheritance Surface layer Hardening treatment Surface plastic deformation Acknowledgements The authors express their gratitude to the master’s degree student Khu- doynazarov AA (group KTm-161), who participated in the research. ABSTRACT Introduction. The metal mechanical state, such as deformation degree and macroscopic residual stresses (MRS) largely determines product operational life, especially in different types of alternating loads. Wide possibilities for creating a favorable mechanical state of the metal have the methods of finishing and hardening treatment by surface plastic deformation (SPD). At the same time, an accurate calculation of the mechanical state of the SPD is not always possible, which preserves the relevance of the study and the creation of model ideas about the formation of the mechanical state and MRS at the stages of mechanical processing in the manufacture of metal products. It is noted that the finite element method (FEM) allows taking into account the change in the mechanical state upon multiple loading of the same metal microvolume and to obtain more accurate analytical solutions. The research purpose consists in the development of the SPD mechanics’ theoretical positions based on the development of a hardenable elastic-plastic body model. The paper presents a FEM model of the surface layer mechanical state formation during hardening treatment by surface plastic deformation (SPD), taking into account the technological inheritance phenomenon. Results and discussion. The simulation is carried out and the distributions of the parameters of stress- strain are obtained; the parameters of the mechanical state of the surface layer and the residual stresses generated in the process of hardening treatment of SPD are calculated. A feature of the proposed model is taking into account the phenomenon of technological inheritance, supplemented by the effect of the hardened body: together with the metal properties evolution, occurred in previous machining operations, the current technological operation changes properties are taken into account. In the proposed model, taking into account the effect of the hardened body is implemented in the form of a scheme of multiple loading and unloading of metal parts as it moves through the space of the deformation zone, which made it possible to accurately describe the phenomenology of the SPD process. The presented results confirm the prospects of spreading the stated model concepts to other mechanical processing methods and various types of operational loading of hardened responsible products. For citation: Mahalov M.S., Blumenstein V.Yu. Surface plastic deformation mechanics. The hardenable elastic-plastic body model. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2018, vol. 20, no. 4, pp. 6–20. doi:10.17212/1994- 6309-2018-20.4-6-20. (In Russian). ______ * Corresponding author Mahalov Maxim S., Ph.D. (Engineering), Associate Professor Kuzbass State Technical University named after T.F. Gorbatchev, 28 Vesennaya st., 650000, Kemerovo, Russian Federation Tel.: +7-903-907-45-02, e-mail: maxim_ste@mail.ru