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Akademický článek

Formulation of non-linear viscoelastic–viscoplastic constitutive equation for polyamide 6 resin

Autor: Jun Koyanagi, Kodai Hasegawa, Akio Ohtani, Takenobu Sakai, Kenichi Sakaue

Publikováno v: Heliyon, Vol 7, Iss 2, Pp e06335- (2021)

In this study, a non-linear viscoelastic–viscoplastic constitutive equation for polyamide 6 (PA6) is formulated and a new model is suggested for the viscoplastic part of the equation. The suggested model is empirical but can accurately predict the

Externí odkaz: https://doaj.org/article/dad8a0ffa7b24f95a8c5de442301fc3d

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Akademický článek

Effect on residual strength properties of needle punched chopped strand mat composites

Autor: Daiki ICHIKAWA, Tohru MORII, Hiroyuki HAMADA, Akio OHTANI

Publikováno v: Mechanical Engineering Journal, Vol 5, Iss 2, Pp 17-00445-17-00445 (2017)

In recent years, due to its high specific stiffness and strength, fiber reinforced plastics (FRP) are being used in aerospace components, automobile components, sports equipment, and in various other applications. Especially since composite laminates

Externí odkaz: https://doaj.org/article/13f6666732d14da98312d1dc820f3712

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Akademický článek

Parameterization, statistical measurement and numerical modeling of fluctuated meso/micro-structure of plain woven fabric GFRP laminate for quantification of geometrical variability

Autor: Kohei HAGIWARA, Shintaro ISHIJIMA, Naoki TAKANO, Akio OHTANI, Asami NAKAI

Publikováno v: Mechanical Engineering Journal, Vol 4, Iss 4, Pp 17-00053-17-00053 (2017)

This paper proposed a stochastic multiscale modeling method by parameterization and quantification of the fluctuated meso/micro-structure of plain woven fabric glass fiber reinforced plastics (GFRP) fabricated by hand layup. The experimental results

Externí odkaz: https://doaj.org/article/3a0d3d8525e540bdacf1e53b512182cf

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Akademický článek

Effect of braided structure on mechanical properties of CFRP pipes

Autor: Takeshi SAITO, Hiroki ASHIDA, Masaya HIROSE, Tadashi UOZUMI, Akio OHTANI, Asami NAKAI

Publikováno v: Nihon Kikai Gakkai ronbunshu, Vol 82, Iss 837, Pp 15-00354-15-00354 (2016)

The purpose of this study is to clarify the effect of the fiber crimps in braided carbon fiber reinforced plastics pipe (Braid pipe). Braid pipes with different crimp angles were fabricated by using carbon fiber with different fineness for the braidi

Externí odkaz: https://doaj.org/article/88bc9991c96544b8bb5b42d514e29cd0

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