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<p>The goal of this study was to develop a test methodology for use in studying cleat-turf mechanical interaction that permits laboratory testing, precision-controlled inputs, variation in normal load applied to the cleat, and imaging of the cleat-turf interaction. This new test method utilized a 6 DOF force/torque and position-controlled serial robotic test device to perform compress-then-shear tests between a cleated shoe surrogate and artificial turf samples. The test method proved to be repeatable in displacement-controlled inputs across variations in axial load. Force response data were also repeatable, but variations in shear response were indicative of inherent variability in turf construction. Precise identification of cleat-turf release was permitted through high-speed imaging and verified to occur at the time of peak horizontal force. A linear relationship was found between release shear force and normal force at time of release for both posterior and lateral shear test types under the loading regime investigated (R<sup>2</sup> = 0.96, R<sup>2</sup> = 0.97). This linear regression represents a “release traction” that can be used to help better understand how turf construction relates to cleat-turf interaction mechanics, which is necessary to optimize player safety and performance.</p>

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Assessment of the mechanics of the shoe-turf release phenomenon over a range of normal loads

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月22日

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  • Benjamin Koerber,
  • Bronislaw Gepner,
  • Mohan Jayathirtha,
  • James Caldwell,
  • Cody O’Cain,
  • E. Meade Spratley,
  • Gwansik Park,
  • Richard Kent,
  • Jason Kerrigan

摘要

The goal of this study was to develop a test methodology for use in studying cleat-turf mechanical interaction that permits laboratory testing, precision-controlled inputs, variation in normal load applied to the cleat, and imaging of the cleat-turf interaction. This new test method utilized a 6 DOF force/torque and position-controlled serial robotic test device to perform compress-then-shear tests between a cleated shoe surrogate and artificial turf samples. The test method proved to be repeatable in displacement-controlled inputs across variations in axial load. Force response data were also repeatable, but variations in shear response were indicative of inherent variability in turf construction. Precise identification of cleat-turf release was permitted through high-speed imaging and verified to occur at the time of peak horizontal force. A linear relationship was found between release shear force and normal force at time of release for both posterior and lateral shear test types under the loading regime investigated (R2 = 0.96, R2 = 0.97). This linear regression represents a “release traction” that can be used to help better understand how turf construction relates to cleat-turf interaction mechanics, which is necessary to optimize player safety and performance.