Deformations and Stresses of Thick-Walled Heat Exchange Pipes during Hydraulic Expansion

Journal of Machinery Manufacture and Reliability - Tập 50 - Trang 703-709 - 2022
L. A. Kondratenko1, L. I. Mironova1, V. S. Vinnikov2
1Moscow Aviation Institute, Moscow, Russia
2Central Research Institute of Mechanical Engineering Technology, Moscow, Russia

Tóm tắt

In this paper, the process of hydraulic expansion of a pipe by fluid pressure in the operation of fixing heat exchange pipes in a tube sheet is considered. The features of plastic deformation of a pipe of sufficient thickness and loading conditions are distinguished. A digital model of the pipe hydraulic expansion process is proposed, and the technology for creating a permanent joint with an interference fit is modeled. The calculated oscillograms of the process are obtained. A feature of the increase in high (up to 500 MPa) pressure in a liquid is considered in detail. The residual contact stress and interference in the joint are determined. A comparative analysis of the obtained calculated data with experimental data was carried out and showed a good convergence of the results.

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Journal of Machinery Manufacture and Reliability

Tập 50

703-709

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