Authors: I.I. Voyachek, D.V. Kochetkov, O.A. Nizov

Title of the article: Ensuring functional properties of a combined threaded-smooth connection during assembly using anaerobic materials

Year: 2025, Issue: 5, Pages: 5-16

Branch of knowledge: 2.5.6. Engineering technology

Index UDK: 621.813

DOI: 10.26730/1999-4125-2025-5-5-16

Abstract: The article is devoted to the study of the functional properties of a new combined smooth-threaded connection, in the assembly of which polymer anaerobic materials are used, placed in the voids of the contact zone of the parts. A decrease in the bearing capacity of traditional threaded connections is associated with uneven distribution of the operating load along the length. In the proposed combined smooth-threaded connection, in addition to the threaded section, a smooth cylindrical section of the mating parts with an intermediate layer of anaerobic material (AM) between them is formed. A technique is proposed that describes the stress-strain state of the joint elements under the action of axial operating load and its functional properties. In particular, the technique allows us to find what part of the load is supported by the cylindrical section, which is important when designing a combined connection. Computer modeling of the connection using the finite element method is carried out. It is found that the cylindrical section of the connection with strengthening AM supports a significant part of the operating load on the connection, which allows unloading the threaded part and increasing the bearing capacity of the connection. The strength of the connection can be further increased by placing AM in the contact zone of the thread turns. The results of the analytical study and computer modeling are in good agreement. The proposed connection is characterized by its technological effectiveness in manufacturing and ease of assembly.

Key words: threaded smooth connection functional properties anaerobic material strength load-bearing capacity

Receiving date: 04.04.2025

Approval date: 22.09.2025

Publication date: 23.10.2025

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