Chapter

The Engineering of Sport 7

pp 125-133

Experimental Validation of a Tennis Ball Finite-element Model for Different Temperatures (P22)

  • Tom AllenAffiliated withSports Engineering Research Group, Sheffield Hallam University
  • , Simon GoodwillAffiliated withSports Engineering Research Group, Sheffield Hallam University
  • , Steve HaakeAffiliated withSports Engineering Research Group, Sheffield Hallam University

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Abstract

An explicit finite-element (FE) model of a pressurised tennis ball was produced in Ansys/LS-DYNA 10.0 and validated at room temperature. This model was successfully updated to simulate temperatures of 283.15 and 313.15 K (10 and 40 ºC), by adjusting the internal pressure and material properties of the ball’s rubber core. The validation experiment was undertaken using an impact rig in a climate chamber, for perpendicular impacts on a rigid surface with inbound velocities in the range from 15 to 30 m·s-1. The impact rig consisted of an air-cannon, for firing the balls, a set of light gates for calculating coefficient of restitution (COR), and a force plate for measuring contact time. The model was found to be in good agreement with the experimental data across the entire range of temperatures tested.

Keywords

Tennis Finite Element Analysis Ball Temperature