ＡＥ法による短繊維強化ＰＥＴの疲労破壊機構に関する研究　負荷方向と繊維含有率の影響

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  • A study on fatigue fracture mechanisms of short fiber reinforced PET composite by the acoustic emission methed. Effects of loading direction and fiber content.
  • AEホウ ニ ヨル タンセンイ キョウカ PET ノ ヒロウ ハカイ キコウ

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Effects of the loading direction and the fiber content on the fatigue crack growth behavior of FRPET are studied by the acoustic emission method. From the behavior of AE event count rate, the fatigue crack growth process is divided into three zones similar to the three stages of the fatigue crack growth curve. Many AE generations under the mean load phase suggest nearness to the final fracture. Three kinds of damage modes occur at all zones in a specimen for which the angle between the directions of loading and injection is 0°(parallel), but not in the specimens of 90°(perpendicular) and 45°(oblique) angles. Fiber breakage is a dominant damage mode in all zones of the fatigue crack growth process in specimens of fiber contents of 15 and 45 % by weight.

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