Seikei-Kakou
Online ISSN : 1883-7417
Print ISSN : 0915-4027
ISSN-L : 0915-4027
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Volume 34, Issue 10
Displaying 1-35 of 35 articles from this issue
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Index
Foreword
Seikei-Kakou Annual Meeting 2022
Technical Notes-Keynote Lectures in Seikei-Kakou Annual Meeting 2022
Report on 32nd “Aoki-Katashi” Award
Technical Report
Report from Universities and Institutions in Japan : 227
Original Paper
  • Relationship between the Index Representing Fiber Orientation State Derived from X-ray Diffraction Image and Tensile Properties in Discontinuous Carbon Fiber Reinforced Polyamide 6
    Mariko Terada, Makoto Ichiki, Atsuhiko Yamanaka, Yukitane Kimoto, Koji ...
    2022 Volume 34 Issue 10 Pages 388-394
    Published: September 20, 2022
    Released on J-STAGE: October 20, 2022
    DOIhttps://doi.org/10.4325/seikeikakou.34.388
    JOURNAL FREE ACCESS
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    The fiber orientation state in carbon fiber reinforced polyamide 6 composites was expressed by an order parameter (S2) that is used to express the orientation state of Nematic Liquid Crystal. S2 was derived from the X-ray diffraction image of the composites that reflects the fiber orientation distribution. As the specimens, composites of various fiber content were prepared and, regardless of the content, S2 and their tensile properties showed positive correlation. Furthermore, we predicted the relation between the fiber content and tensile modulus in the case of the quasi-isotropic composites used by the measured tensile modulus and S2 to compare with those calculated by the modified Halpin-Tsai model that takes into account the fiber length distribution of the specimens. Because of the similarity between the results derived from the different methods, it was found that S2 is a useful index that represents the condition of fiber orientation in the fiber reinforced composite materials.

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