著者
鮑 力民 轟 純一 銭 丹娜 剱持 潔
出版者
The Textile Machinery Society of Japan
雑誌
Journal of Textile Engineering (ISSN:13468235)
巻号頁・発行日
vol.56, no.1, pp.1-8, 2010-02-15 (Released:2010-05-04)
参考文献数
20
被引用文献数
1

For the restitution behavior between the tennis strings and the ball, the setting unit which can set up the interval length and tension force of the string is produced, and identified the viscoelasticity characteristic of string side and ball by compression, vibration and impact tests experimentally. It was found that the restitution coefficient is increased with the increasing distance of string interval, but reduced with the increasing string tension at the impact velocity of 5.42m/s. The regularity about the viscosity characteristic is not very much obvious. Furthermore, the influences on restitution behavior are discussed by numerical simulation analysis. The simulation results are not only corresponded with the experimental results, but also revealed that string rigidity is great effective on restitution coefficient. The effect of viscoelasticity can be ignored due to its slight influence.
著者
森川 英明 高寺 政行 鮑 力民 後藤 康夫 佐古井 智紀
出版者
信州大学
雑誌
挑戦的萌芽研究
巻号頁・発行日
2009

日本で多発する刃物による傷害(事件)に対応するため,軽量で快適な防刃被服について検討を行った.研究は,防刃性能の工学的評価法の確立,高性能ナノ材料および複合層構造による貫通遮断機構の開発,防刃被服の温熱環境評価と改善法の検討,被服構成学に基づく防刃被服の評価・構造設計,の4つの側面から行った.その結果,防刃材料の開発に必要な物理量による評価手法を構築すると共に,防刃用繊維材料,防刃衣服の冷却機構などの提案が可能となった.