Thermomechanical Analysis of the Stress-Strain State of Multilayer Press Joints of Motor-Axial Bearings of Locomotives

Sergey Krotov

doi:10.20295/1815-588X-2026-3-635-648

UDC 629.4.027 UDC 539.37

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THERMOMECHANICAL ANALYSIS OF THE STRESS-STRAIN STATE OF MULTILAYER PRESS JOINTS OF MOTOR-AXIAL BEARINGS OF LOCOMOTIVES Thermomechanical Analysis of the Stress-Strain State of Multilayer Press Joints of Motor-Axial Bearings of Locomotives

АА Аа

Published in Proceedings of Petersburg Transport University · Volume 23, Issue 3, 2026 · Pages 635–648 · Rubric: PROBLEMATIC OF TRANSPORT SYSTEM

DOI: https://doi.org/10.20295/1815-588X-2026-3-635-648

Received: 03.06.2026 Accepted: 09.07.2026 Published: 07.10.2026 Language of publication: RUS

Authors

Sergey Krotov

Academic degree: candidate of technical sciences

Science rang: docent

Rostov State Transport University Associate Professor · Russian Federation · Rostov-on-Don

ABSTRACT

Objective: the study aims to establish the fundamental thermomechanical patterns of non-linear stressstrainstate evolution in multi-layered interference fits of locomotive suspension bearings under the synergetic effect of initial assembly interferences and extreme temperature fields to predict their operational reliability thresholds. Methods: a two-dimensional axisymmetric non-linear contact model of the component assembly was implemented using finite element analysis software. The interaction of contact pairs at the interface boundaries was investigated using non-linear formulations that account for sliding friction forces. The simulation was performed within a multi-stage thermomechanical loading framework. This framework included sequential stages of mechanical press-fitting of components at baseline temperature, subsequent uniform thermal exposure under operating conditions, and a return to the initial thermal state, alongside an independent analysis of structural performance under extreme heating and deep cooling. Results: it was established that during operational heating up to 90 °C, the contact pressure decreases by 4.3 % (down to 39.9 MPa), which triggers an axial slippage of the bearing shell up to 22.14 μm. Under extreme heating (+200 °C), the equivalent stresses in the steel jacket peak at 245.6 MPa, while maintaining an elastic deformation behavior (70 % of the yield strength). Under extreme cooling (–40 °C), the intensive thermal contraction of the bronze leads to an increase in bearing shell stresses up to 99 MPa, which creates a local risk of plastic collapse within the anti-friction layer. Practical signi ficance: the obtained quantitative patterns allow for the substantiation of optimal assembly interferences and temperature ranges for the safe operation of locomotive bearing units, preventing interface separation and plastic degradation of the elements. Furthermore, these results can be utilized in the design of prospective locomotive components.

KEYWORDS

suspension bearing, interference fit, interference, contact pressure, von mises equivalent stress, thermal expansion, ansys

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Editor-in-chief

Oleg S. Valinskiy

Deputy Editor-in-chief

Dmitry Kurilkin

It@pgups.ru

Science editor

Andrey Evstaf'ev

elt@pgups.ru

Edition

zhurnala P. Redakciya

izvestia@izvestiapgups.org

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Krotov S. V. Thermomechanical Analysis of the Stress-Strain State of Multilayer Press Joints of Motor-Axial Bearings of Locomotives // Proceedings of Petersburg Transport University. 2026. no. 3. pp. 635-648. DOI: https://doi.org/10.20295/1815-588X-2026-3-635-648. (Date of access 11.10.2026).

MLA

Sergey Krotov. "Thermomechanical Analysis of the Stress-Strain State of Multilayer Press Joints of Motor-Axial Bearings of Locomotives." Proceedings of Petersburg Transport University 23.3 (2026): 635-648. DOI: https://doi.org/10.20295/1815-588X-2026-3-635-648.

APA

Krotov S. V. (2026). Thermomechanical Analysis of the Stress-Strain State of Multilayer Press Joints of Motor-Axial Bearings of Locomotives. Proceedings of Petersburg Transport University, 23(3), 635-648. https://doi.org/10.20295/1815-588X-2026-3-635-648

Chicago

Sergey Krotov. "Thermomechanical Analysis of the Stress-Strain State of Multilayer Press Joints of Motor-Axial Bearings of Locomotives." Proceedings of Petersburg Transport University 23, no. 3 (2026): 635-648. https://doi.org/10.20295/1815-588X-2026-3-635-648.

WIKI

{{cite journal | author = Krotov S. V. | title = Thermomechanical Analysis of the Stress-Strain State of Multilayer Press Joints of Motor-Axial Bearings of Locomotives | journal = Proceedings of Petersburg Transport University | year = 2026 | volume = 23 | issue = 3 | pages = 635-648 | doi = 10.20295/1815-588X-2026-3-635-648 }}

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THERMOMECHANICAL ANALYSIS OF THE STRESS-STRAIN STATE OF MULTILAYER PRESS JOINTS OF MOTOR-AXIAL BEARINGS OF LOCOMOTIVES Thermomechanical Analysis of the Stress-Strain State of Multilayer Press Joints of Motor-Axial Bearings of Locomotives

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