干涉配合弹性强化机理分析

doi:10.7527/S1000-6893.2017.21687

Abstract

Abstract: In view of the limitations of the traditional interference theory based on the supporting effect (SE), the spring model (SM) is introduced here to study the fatigue enhancing mechanism of interference, in the hope of obtaining a more comprehensive understanding of the interference strengthening technology and promoting its applications. The inadequacies of the SE theory are firstly analyzed, and a range of insoluble problems are discussed. Then, an introduction of the basic concepts and the analytical results of the SM are given. The mentioned problems are explained in terms of elastic deformation, and the analytical solution for the optimum amount of interference is derived. An analysis of the SM indicates that there exists an elasticity reinforcement mechanism in an interference-fitted joint, and the elastic deformation of member components subjected to alternating external applied load and the automatic regulating effect of contact are the reason for the reduction of the amplitude of load transferred by the connected members. It is also concluded that the sizes and materials of components, as well as actual loading conditions, should be taken into consideration in determining the optimum interference.

Key words: interference fit, spring model, enhancing mechanism, fatigue, stress amplitude

CLC Number:

V260.1

ZHANG Qiliang, CAO Zengqiang, LI Hongmei, XIANG Cong, LIU Ping. Elastic fatigue enhancement mechanism of interference fit[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2018, 39(4): 421687-421687.

References

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Elastic fatigue enhancement mechanism of interference fit

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