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Meshing stiffness is one of the most important dynamic factors of the spur gear, for which accurate measurement is of significance. 3D-DIC techniques (Three-Dimensional-Digital Image Correlation) utilize ultra-precision optical cameras to measure the deformation at the gear tooth and obtain meshing stiffness subsequently. Compared to existing photo elasticity or strain gauge techniques, 3D-DIC techniques enjoy the advantage of non-contact measurement as simple implementation and avoid the device being directly set on the gear body. Meanwhile, the contact stiffness component is calculated using the fractal method based on the observation of the microscopic roughness profile of the gear surface. The experiment is performed on gears with different surface roughness under distinct external loads to study the variation of gear meshing stiffness. (Abstract)

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Measurement of Gear Meshing Stiffness by 3D-DIC Technique Involving Fractal Contact Stiffness

  • 会议论文

  • 发表日期：

    2026年

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  • Xin Yu,
  • Yunyun Sun,
  • Shijing Wu

摘要

Meshing stiffness is one of the most important dynamic factors of the spur gear, for which accurate measurement is of significance. 3D-DIC techniques (Three-Dimensional-Digital Image Correlation) utilize ultra-precision optical cameras to measure the deformation at the gear tooth and obtain meshing stiffness subsequently. Compared to existing photo elasticity or strain gauge techniques, 3D-DIC techniques enjoy the advantage of non-contact measurement as simple implementation and avoid the device being directly set on the gear body. Meanwhile, the contact stiffness component is calculated using the fractal method based on the observation of the microscopic roughness profile of the gear surface. The experiment is performed on gears with different surface roughness under distinct external loads to study the variation of gear meshing stiffness. (Abstract)