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Registration Number

0220U102336, 0116U007122 , R & D reports

Title

Development of methods for calculating the residual stress-strain state of restored parts of structures and machines from thin bimetallic parts those operate under conditions of intensive abrasive wear

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Head

Senchenkov Ihor К., Доктор фізико-математичних наук

Registration Date

11-03-2020

Organization

S.P.Timoshenko Institute of Mechanics

Description

The object of study is the residual stress-strain and microstructural state of sheet and thin-walled cylindrical parts during surfacing. The purpose of the work is to improve the method of calculating the residual stress-strain and microstructural states of sheet and thin-walled cylindrical parts during surfacing to account for different technological conditions of bearing and fixing elements, modeling the process of multilayer surfacing, taking into account operational wear and subsequent surfacing. Numerical modeling of surfacing processes was carried out using a finite element technique, Bodner-Partom’s unified model of viscoplastic flow, the theory of growing bodies, as well as thermokinetic diagrams for calculating microstructural transformations. The calculations of specific parts with multilayer surfacing were carried out. It is a satisfactory agreement of the results of numerical simulation of the residual deflection with the data of experiments for sheet parts in the case of single-layer surfacing with 25X5FMS steel, as well as two-layer surfacing with SV-08A steel. According to the advanced method, the calculation of the SSS of the elements under the conditions of operational wear of the layers surfaced was performed. The parameters of the SSS in the technological and operational cycle of surfacing – abrasive wear – restorative surfacing have been calculated. The magnitudes of the characteristic stresses required for calculating the fatigue life of the sheet elements and prolonging their service life with the use of multiple restorative surfacing technology have been established.  

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Zinchuk Liubov P.
Karnaukhov Vasil G.
Kyrychok Ivan F.
Kozlov Volodymyr I.
Senchenkov Ihor K.
Chervinko Olha P
Shevchenko Oleksandr Yu