Development of a test methodology for the assessment of human impacts in sport

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Conference Proceeding
Procedia Engineering, 2012, 34 pp. 813 - 818
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The study described in this paper aims to develop a suitable method for the measurement of contact forces, pressures and velocities of simulated human-on-human impacts typical of those experienced within American Football. A thin-film pressure sensor system was chosen to enable the impacts to be quantified, however, initial testing suggested that the measured impact forces were underestimated by circa 30% with the system calibrated in the standard, static pressure manner. A two-stage, dynamic calibration was therefore developed, in which the sensors were subsequently dynamically loaded in a manner more representative of the impacts, allowing an appropriate dynamic calibration factor to be derived. To determine the typical impact force levels experienced in a shoulder-on-thigh impact event, eight subjects were required to perform three "good" tackles at two different velocities. The processed results identified a peak, transmitted force of 1.1 (0.4) and 1.7 (0.5) kN for "low" and "medium" velocities respectively, with corresponding effective areas of application of 70 (22) cm 2 and 85 (25) cm 2 and contact times of 0.257 (0.098) s and 0.245 (0.112) s respectively. © 2012 Published by Elsevier Ltd.
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