A Method for Preventing Crack Propagation in a Steel Gas Conduit Reinforced with Composite Overlays
Zhangabay N. Suleimenov U. Bonopera M. Ibraimova U. Yeshimbetov S.
2025Tech Science Press
SDHM Structural Durability and Health Monitoring
2025#19Issue 4773 - 787 pp.
This research presents a numerical simulation methodology for optimizing circular composite overlays’ dimensions and pressure characteristics with orthotropic mechanical properties, specifically, for metal conduits with temperature-dependent elastoplastic behavior. The primary objective of the proposed method is to prevent crack propagation during pressure surges from operational to critical levels. This study examines the “Beineu-Bozoy-Shymkent” steel gas conduit, examining its performance across a temperature range of −40 to +50̊C. This work builds on prior research on extended avalanche destruction in steel gas conduits and crack propagation prevention techniques. The analysis was conducted using a dynamic finite-element approach with the ANSYS-19.2/Explicit Dynamics software. Simulations of unprotected conduits revealed that increasing gas-dynamic pressure can convert a partial-depth crack into a through-crack, extending longitudinally to approximately seven times its initial length. Notably, at T = +50̊C, the developed crack length was 1.2% longer than that at T = −40̊C, highlighting the temperature sensitivity of crack progression. The modeling results indicate that crack propagation can be effectively controlled using a circular composite overlay with a thickness between 37.5% and 50% of the crack depth and a length approximately five times that of the initial crack, centered symmetrically over the crack. In addition, preliminary stress analysis indicated that limiting the overlay-induced pressure to 5% of the operational pressure effectively arrested crack growth without generating significant stress concentrations near the overlay boundaries, thereby preventing conduit integrity. Copyright
Avalanche destruction , composite overlay , dynamic strength , finite-element , intrinsic gas-dynamic pressure , preliminary stress
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Department of Architecture and Urban Planning, Mukhtar Auezov South Kazakhstan University, Tauke Khan av., 5, Shymkent, 160012, Kazakhstan
Department of Architecture and Industrial Design, University of Campania “Luigi Vanvitelli”, Via San Lorenzo ad Septimum, Aversa, 81031, Italy
Department of Scientific and Innovative Work, Peoples’ Friendship University named after Academician A. Kuatbekov, Tole bi str., 32B1, Shymkent, 160011, Kazakhstan
Department of Architecture and Urban Planning
Department of Architecture and Industrial Design
Department of Scientific and Innovative Work
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