Izvestiya of Saratov University.

Mathematics. Mechanics. Informatics

ISSN 1816-9791 (Print)
ISSN 2541-9005 (Online)

For citation:

Firsov S. V. Plastic strain of the bimetal tube subjected to inner pressure. Izvestiya of Saratov University. Mathematics. Mechanics. Informatics, 2025, vol. 25, iss. 2, pp. 259-270. DOI: 10.18500/1816-9791-2025-25-2-259-270, EDN: WIEVBM

This is an open access article distributed under the terms of Creative Commons Attribution 4.0 International License (CC-BY 4.0).
Published online: 
30.05.2025
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Language: 
Russian
Heading: 
Mechanics
Article type: 
Article
UDC: 
539.374
DOI: 
10.18500/1816-9791-2025-25-2-259-270
EDN: 
WIEVBM

Plastic strain of the bimetal tube subjected to inner pressure

Autors: 
Firsov Sergey Viktorovich, Khabarovsk Federal Research Center of the Far Eastern Branch of the Russian Academy of Sciences
Abstract: 

The problem of deformation of a two-layer (bimetallic) thick tube under inner pressure is considered. A dependence of critical load from physical and geometrical properties of the product at which plastic flow is occurred at the beginning of either inner or outer layer is derived. The relations for the semi-analytical solution of the problem of irreversible deformation of a two-layer pipe under the influence of internal pressure are derived. A special case of deformation of a bimetallic pipe made of 09G2C steel with an internal plating layer made of corrosion-resistant 13XFA steel at various thicknesses is considered. The calculation of the autofrettage process was performed in order to improve the operational properties of the product. Conclusions about the choice of the optimal (in terms of strength properties) thickness of the cladding layer, based on the physical parameters of the materials used and the geometric dimensions of the product are drawn.

Key words: 
elasticity
plasticity
viscoplasticity
plain strain
small strain
bimetal tube
inner pressure
Acknowledgments: 
The work was carried out within the framework of the state task of the Khabarovsk Federal Research Center of the Far Eastern Branch of the Russian Academy of Sciences.
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Received: 
13.03.2024
Accepted: 
04.10.2024
Published: 
30.05.2025
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