Journal of Mineral and Material Science
[ ISSN : 2833-3616 ]
A Tribological Aad Mechanical Analysis of Boot-Ball Interfaces in Association Football: Rebound Dynamics and Friction Coefficients Under Varying Environmental Constraints
Department of Mechanical Engineering, Faculty of Engineering, King Abdulaziz University, Jeddah, Saudi Arabia
Corresponding Authors
Keywords
Abstract
This study characterizes the dynamic Coefficient f Restitution (e) and the Kinetic Friction Coefficient (μ) across three distinct footwear upper materials-textured (PMC-T), hybrid (PMC-H), and smooth (PMC-S)-interfacing with three match ball casings exhibiting variable topography and damping characteristics (BC-G, BC-D, and BC-E). The results indicate that impact dynamics are predominantly influenced by the ball casing formulation; specifically, the low-hysteresis BC-E casing paired with the PMC-S upper yielded the highest global restitution (???? = 0.805). Conversely, tribological performance was found to be governed primarily by surface topography and environmental moisture. The macro-textured PMC-T coupled with the micro-grooved BC-G casing demonstrated optimal frictional performance ( µ ≈ , dry peak 0.66 µ ; = dry mean , 0.61 ), a phenomenon attributed to enhanced mechanical interlocking mechanisms. The introduction of an aqueous medium facilitated micro hydroplaning, resulting in a systematic degradation of performance across all interfaces, with relative friction reductions ranging from 27.6% to 33.3%. Ultimately, these mechanical metrics were contextualized within a tactical performance framework, suggesting that while smooth, low-damping pairings maximize normal kinetic energy transmission for long range striking, high-friction, textured interfaces optimize tangential force transmission, thereby enhancing control and spin generation in wet-weather conditions.
