McGowan Harry, Fleming Paul, James David, Morris James, Forrester Steph
School of Architecture, Building and Civil Engineering, Loughborough University, Loughborough, UK.
Labosport, Unit 3 Aerial Way, Hucknall, UK.
Sci Rep. 2025 Mar 16;15(1):9039. doi: 10.1038/s41598-025-92768-1.
The scientific principles governing the generation of rotational traction forces on artificial turf remain poorly understood; as such, a photogrammetry technique has been developed to understand the interactions occurring at the boot-surface interface. Videos were recorded through a transparent test foot during rotational traction testing on an artificial turf surface "seeded" with distinguishable performance infill particles. A novel particle tracking software then measured the movement of seeded particles. To determine the uncertainty in the methodology, a gold-standard measurement system determined the distances between 28 fiducial markers. The same marker-to-marker distances were measured using the particle tracking software. For ten static and ten rotating trials, the random bias in the particle tracking software distances was ± 0.89 mm to ± 1.07 mm, respectively. A pilot study on a third-generation artificial turf surface assessed the software's ability to track infill particles during rotational traction testing. Trials were conducted at two normal loads; particle positions and angular displacements were successfully measured over 40° of rotation and synchronised with torque, angle, and vertical displacement data. A greater number of infill particles were lost during tracking at lower normal loads. This novel methodology represents a useful development in understanding the generation of traction forces, helping to inform future generations of artificial turf and studded footwear.
关于在人造草皮上产生旋转牵引力的科学原理仍知之甚少；因此，已开发出一种摄影测量技术来了解在靴子 - 草皮表面界面处发生的相互作用。在铺有可区分性能填充颗粒的人造草皮表面进行旋转牵引力测试时，通过一个透明测试靴录制视频。然后，一种新型颗粒跟踪软件测量了播种颗粒的运动。为了确定该方法的不确定性，一个金标准测量系统测定了28个基准标记之间的距离。使用颗粒跟踪软件测量相同的标记到标记的距离。对于十次静态试验和十次旋转试验，颗粒跟踪软件测量距离的随机偏差分别为±0.89毫米至±1.07毫米。在第三代人造草皮表面上进行的一项初步研究评估了该软件在旋转牵引力测试期间跟踪填充颗粒的能力。试验在两种法向载荷下进行；在40°的旋转过程中成功测量了颗粒位置和角位移，并与扭矩、角度和垂直位移数据同步。在较低法向载荷下跟踪过程中损失的填充颗粒数量更多。这种新方法是在理解牵引力产生方面的一项有益进展，有助于为下一代人造草皮和带钉鞋提供参考。
