OS0907 水を充填した円管の衝撃による応力波と流体-構造連成応答(衝撃工学とその応用,オーガナイズドセッション)

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概要

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• The goal of the present study is to reveal the coupling of large-amplitude (including plastic deformation) flexural waves and precursor waves in water-filled, thin-wall tubes. The flexural waves are generated by stress waves in the water propagating along the tube axis. The maximum hoop strain with mild-steel tubes was observed just below the bottom surface of the buffer as a bulge with 25% hoop strain. Hoop and longitudinal strains indicate a steep elastic front followed by a gradual plastic deformation. Since the plastic deformation wave travels much slower than the elastic waves, the initial flexural wave fronts propagate at 1350 m/s and are close to the wave speed of the Korteweg's elastic theory of water hammer. Measured wave speeds with CFRP tubes are consistent with effective modulus models of layered composite materials. The failure mechanisms of the CFRP tube wound at 45° resemble that of ductile materials, whereas the mechanisms for the tubes wound at 60° resemble those of brittle materials.

• 2009-07-24

著者

• 因幡 和晃

  Tokyo Institute of Technology, Dept. of Mechanical Sciences and Engineering

• 因幡 和晃

  Tokyo Institute Of Technology Dept. Of Mechanical Sciences And Engineering

関連論文

• OS0907 水を充填した円管の衝撃による応力波と流体-構造連成応答(衝撃工学とその応用,オーガナイズドセッション)

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