B21 スポーツサーフェス緩衝特性試験のための2次元衝撃試験器の製作とその特性評価(材料)

概要

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The purpose of this study is to propose a two dimensional shock test device for sports surfaces. There are some shock tests used for evaluating shock attenuation which seems to be heavily related to injuries and performances. However these tests are reproductive and the criteria for evaluation is very strict, this evaluation method may have an issue of particularity because material behavior would be changed when mechanical properties of dropping mass-spring are changed even if the impact force are almost same. One of the effective way to avoid this issue may be incorporating a model and simulation method. There are some viscoelastic models for sports surfaces which can represent material behavior well. Although these models are dealing with only vertical properties, horizontal properties are also important for preventing the injuries and making good performances. In most of current standards, horizontal properties are not considered but coefficient of dynamic friction. Because of this reason, a two dimensional shock test device are proposed (Kobayashi and Yukawa, 2007). In this study, modified two dimensional shock test device based on the previous study is proposed and is used for acquiring data. With the comparison between the data from sensor unit and the data from video analysis, acquired data from this device shows almost the same values from the video analysis.
社団法人日本機械学会の論文
2008-11-05