テニスストリングスの剛体との反発挙動の測定

概要

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The relationship between restitution behavior of strings and its mechanical properties was measured and discussed. An impact test device that could control the initial tension and impact velocity on speed area of less than 10 m/s was developed for measuring the restitution behavior of hammer and tensioned strings. About this device, influence to the measurement results of mass and materials of the hamnler and slipping on the clamps was examined. Using this device, restitution behavior of tennis strings was measured. A dynamic restitution model considering tensile viscoelasticity of materials was suggested with approximating it by Voigt model. The restitution behavior was simulated by numerical computation. In experimental range for all samples, coefficient of restitution increases with initial tension and decreases with initial velocity, and when the mass of a hammer is small, the coefficient becomes big. The calculation results of the model could show the tendency of experimental results well.
1999-02-25