Contact mechanics modeling of fractal surface with complex multi-stage actual loading deformation

Pan, Wujiu; Sun, Yinghao; Li, Xianmu; Song, Hongxing; Guo, Jinman

doi:10.1016/j.apm.2024.01.011

Cited by 4 publications

(1 citation statement)

References 43 publications

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“…Similarly, Sun et al [28] established the thermal contact fractal model with the consideration of friction coefficient. Pan et al [29] used a novel truncated area size distribution function to construct a multiasperity fractal contact model. To construct a more comprehensive contact mechanics model, Yu et al [30] constructed a multi-stage contact model of the fractal curved surface based on the attitude angle of the asperities.…”

Section: Introductionmentioning

confidence: 99%

A Joint Surface Contact Stiffness Model Considering Micro-Asperity Interaction

Xia,

Qu,

Liu

2024

Aerospace

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Mechanical joint interfaces are widely found in mechanical equipment, and their contact stiffness directly affects the overall performance of the mechanical system. Based on the fractal and elastoplastic contact mechanics theories, the K-E elastoplastic contact model is introduced to establish the contact stiffness model for mechanical joint interfaces. This model considers the interaction effects between micro-asperities in the fully deformed state, including elasticity, first elastoplasticity, second elastoplasticity, and complete plastic deformation state. Based on this model, the effects of fractal parameters on normal contact stiffness and contact load are analyzed. It can be found that the larger fractal dimension D or smaller characteristic scale coefficient G will weaken the interaction between micro-asperities. The smoother processing surfaces lead to higher contact stiffness in mechanical joint interfaces. The applicability and effectiveness of the proposed model are verified by comparing it with the traditional contact model calculation results. Under the same load, the interaction between micro-rough surfaces leads to an increase in both overall deformation and contact stiffness. The accuracy of the predicted contact stiffness model is also validated by comparing it with experimental results.

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Section: Introductionmentioning

confidence: 99%

A Joint Surface Contact Stiffness Model Considering Micro-Asperity Interaction

Xia,

Qu,

Liu

2024

Aerospace

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A novel calculation method for torsional stiffness of flange-spigot structure in aeroengine rotors

Zhao,

Liu,

Gong

et al. 2024

Tribology International

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A Novel Contact Resistance Model for the Spherical–Planar Joint Interface Based on Three Dimensional Fractal Theory

An,

Wang,

Huang

et al. 2024

Fractal Fract

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In order to obtain the contact resistance of relay contacts more accurately, a novel contact resistance model for the spherical–planar joint interface is constructed based on the three-dimensional fractal theory. In this model, three-dimensional fractal theory is adopted to generate a rough surface at microscopic scale. Then, using contact mechanics theory, the deformation mechanism of asperities on rough surfaces is explored. Combined with the distribution of asperities, a contact resistance model for the planar joint interface is established. Furthermore, by introducing the surface contact coefficient, cross-scale coupling between the macro-geometric configuration and micro-surface topography is achieved, and a contact resistance model for the spherical–planar joint interface is constructed. After that, experiments are conducted to verify the accuracy of the proposed model, and the maximum relative error of the proposed model is 8.44%. Ultimately, combining numerical simulation analysis, the patterns of variation in contact resistance influenced by factors such as macroscopic configuration and microscopic topography are discussed, thereby revealing the influence mechanism of the contact resistance for the spherical–planar joint interface. The proposed model provides a solid theoretical foundation for the optimization of relay contact structures and improvements in manufacturing processes, which is of great significance for ensuring the safe and stable operation of power systems and electronic equipment.

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Contact mechanics modeling of fractal surface with complex multi-stage actual loading deformation

Cited by 4 publications

References 43 publications

A Joint Surface Contact Stiffness Model Considering Micro-Asperity Interaction

A Joint Surface Contact Stiffness Model Considering Micro-Asperity Interaction

A novel calculation method for torsional stiffness of flange-spigot structure in aeroengine rotors

A Novel Contact Resistance Model for the Spherical–Planar Joint Interface Based on Three Dimensional Fractal Theory

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