A thread loosening analysis method based on fretting friction theory

Abstract

The invention belongs to the technical field of thread loosening, and provides a thread loosening analysis method based on fretting friction theory, which includes analyzing the stress and loosening of the thread model, analyzing the fretting slip state, and establishing the fretting slip state. The movement model, the establishment of a simulation model, the analysis of the fretting slip state based on the dissipated energy of the grain, and the analysis of the fretting slip state by using the fretting diagram. On the basis of fully considering the influence of fretting friction on thread loosening, the present invention proposes a thread loosening analysis method based on fretting friction theory. The method mainly establishes the contact surface mathematical model and the stress of thread loosening interface Distribution and pressure distribution theory formulas, simulation analysis of interface stress and interface pressure and other steps to analyze the loosening phenomenon, and by introducing thread dissipation energy and fretting diagram theory to make the loosening state clearer, for the future of this kind of thread loosening The research provides a reference idea. Based on the above reasons, the present invention can be widely promoted in the field of thread loosening.

Description

technical field [0001] The invention relates to a thread loosening analysis method based on fretting friction theory, and belongs to the technical field of thread loosening. Background technique [0002] As a common fastening method, bolted connection structure is widely used in various mechanical structures, especially in the fields of aviation and aerospace. The quality of bolted connection structure is very important to the overall performance of mechanical equipment. Loosening is one of the main forms of failure of the bolted connection structure, which will lead to a gradual decrease in the clamping force between the connecting parts, and even cause the failure of the entire bolted connection, causing major accidents. is of great significance. [0003] Although the loosening of the screw connection did not cause major accidents at the initial stage of failure, the bolt tension will become lower and lower during the failure process, and the resulting structural failures...

AI Technical Summary

Problems solved by technology

[0005] Based on the above-mentioned situation, various research scholars have only studied the local factors of thread loosening and have not proposed a complete theory of thread loosening. Therefore, the present invention proposes a thread loosening analysis method based on fretting friction theory, mainly It is from the force analysis of the thread, the loose thread

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