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Appl. Sci. 2018, 8(4), 501; https://doi.org/10.3390/app8040501

Mechanical Characterisation and Modelling of Elastomeric Shockpads

1
Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough LE11 3TU, UK
2
School of Architecture, Building and Civil Engineering, Loughborough University, Loughborough LE11 3TU, UK
*
Author to whom correspondence should be addressed.
Received: 30 January 2018 / Revised: 19 March 2018 / Accepted: 20 March 2018 / Published: 27 March 2018
(This article belongs to the Special Issue Sports Materials)
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Abstract

Third generation artificial turf systems are comprised of a range of polymeric and elastomeric materials that exhibit non-linear and strain rate dependent behaviours under the complex loads applied from players and equipment. An elastomeric shockpad is often included beneath the carpet layer to aid in the absorption of impact forces. The purpose of this study was to characterise the behaviour of two elastomeric shockpads and find a suitable material model to represent them in finite element simulations. To characterise the behaviour of the shockpads an Advanced Artificial Athlete test device was used to gather stress-strain data from different drop heights (15, 35 and 55 mm). The experimental results from both shockpads showed a hyperelastic material response with viscoelasticity. Microfoam material models were found to describe the material behaviour of the shockpads and were calibrated using the 55 mm drop height experimental data. The material model for each shockpad was verified through finite element simulations of the Advanced Artificial Athlete impact from different drop heights (35 and 15 mm). Finite element model accuracy was assessed through the comparison of a series of key variables including shock absorption, energy restitution, vertical deformation and contact time. Both shockpad models produced results with a mean error of less than 10% compared to experimental data. View Full-Text
Keywords: shockpad; artificial turf; rubber; finite element analysis; impact shockpad; artificial turf; rubber; finite element analysis; impact
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Cole, D.; Forrester, S.; Fleming, P. Mechanical Characterisation and Modelling of Elastomeric Shockpads. Appl. Sci. 2018, 8, 501.

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