STUDY ON THE EFFECT OF FIBER ORIENTATION TO TENSILE BEHAVIOR OF HPFRCC

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  • ASANO Kohei
    Doctoral Program Student, Graduate School of Systems and Information Engineering, Univ. of Tsukuba, M. Eng.
  • KANAKUBO Toshiyuki
    Assoc. Prof., Graduate School of Systems and Information Engineering, Univ. of Tsukuba, Dr. Eng.

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Other Title
  • HPFRCCにおける繊維の配向性が引張性状に及ぼす影響
  • HPFRCCにおける繊維の配向性が引張性状に及ぼす影響 : 繊維配向角分布の評価と曲げ性状における寸法効果
  • HPFRCC ニ オケル センイ ノ ハイコウセイ ガ ヒッパリ セイジョウ ニ オヨボス エイキョウ : センイハイコウカク ブンプ ノ ヒョウカ ト マゲ セイジョウ ニ オケル スンポウ コウカ
  • Evaluation of fiber orientation distribution and size effect of bending behavior
  • 繊維配向角分布の評価と曲 げ性状における寸法効果

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Abstract

The purpose of this study is to evaluate the effect of fiber orientation in HPFRCC (High Performance Fiber-Reinforced Cementitious Composite) to its tensile behavior. The cylindrical core specimens are extracted from HPFRCC specimens which have different sectional size. These core specimens are operated with X-ray CT scan system and fiber in HPFRCC is visualized. The fiber orientation angle is obtained from the visualized images and the fiber orientation angle distribution is evaluated by newly defined probability density function characterized by “orientation intensity”. The fiber orientation has the tendency that the fiber is oriented toward the parallel direction to matrix flow. The calculation for bending strength is carried out using the proposed evaluation method and the result can express the tendency of the size effect of experimental results.

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