TY - JOUR
T1 - Fabrication of doubly-curved CFRP shell structures with control over fiber directions
AU - Takezawa, Masahito
AU - Otoguro, Yuto
AU - Matsuo, Kohei
AU - Shibutani, Tadahiro
AU - Sakurai, Akio
AU - Maekawa, Takashi
N1 - Funding Information:
This work is supported by the Japan Society for the Promotion of Science , Grants-in-Aid for Scientific Research Grant Number 18H01355 and partially supported by JST CREST, Japan Grant Number JPMJCR1911 . We would like to thank Kenji Takizawa for extensive discussions on principal stretch and stress lines. We also thank former Yokohama National University students Mizuki Yamamoto, Haejun Lee, Riku Usami, Shun Iinuma, Taketoshi Suzuki, and Takuma Imai for their discussions at the early stages of this research. Finally, we would like to thank anonymous reviewers for their invaluable comments.
Funding Information:
This work is supported by the Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant Number 18H01355 and partially supported by JST CREST, Japan Grant Number JPMJCR1911. We would like to thank Kenji Takizawa for extensive discussions on principal stretch and stress lines. We also thank former Yokohama National University students Mizuki Yamamoto, Haejun Lee, Riku Usami, Shun Iinuma, Taketoshi Suzuki, and Takuma Imai for their discussions at the early stages of this research. Finally, we would like to thank anonymous reviewers for their invaluable comments.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/7
Y1 - 2021/7
N2 - We introduce a fabrication method of doubly-curved shell structures by CFRP with control over fiber directions. Doubly-curved surfaces are tessellated into structured quadrilateral patches according to the purpose of use. One can design the tessellation in the parameter space, and map it to the 3D parametric surface, or use the orthogonal net of curves on surfaces such as lines of curvature, principal stretch lines, and principal stress lines. These patches, which we call generalized principal patches, are flattened onto a plane, and connected one by one by aligning the equi-length adjacent edges using translations and rotations forming generalized principal strips. Carbon fiber tows are placed onto these strips with one stroke by tailored fiber placement embroidery machines so that the fibers are not disconnected within strips. Preforms are stacked layer by layer into a mold of particular parts, and VaRTM or L-RTM method is employed to fabricate CFRP parts. We demonstrated the effectiveness of our proposed method by manufacturing an automobile hood and a marine propeller blade.
AB - We introduce a fabrication method of doubly-curved shell structures by CFRP with control over fiber directions. Doubly-curved surfaces are tessellated into structured quadrilateral patches according to the purpose of use. One can design the tessellation in the parameter space, and map it to the 3D parametric surface, or use the orthogonal net of curves on surfaces such as lines of curvature, principal stretch lines, and principal stress lines. These patches, which we call generalized principal patches, are flattened onto a plane, and connected one by one by aligning the equi-length adjacent edges using translations and rotations forming generalized principal strips. Carbon fiber tows are placed onto these strips with one stroke by tailored fiber placement embroidery machines so that the fibers are not disconnected within strips. Preforms are stacked layer by layer into a mold of particular parts, and VaRTM or L-RTM method is employed to fabricate CFRP parts. We demonstrated the effectiveness of our proposed method by manufacturing an automobile hood and a marine propeller blade.
KW - CFRP
KW - Isogeometric Analysis
KW - Lines of curvature
KW - NURBS
KW - Principal stress/stretch lines
KW - Tailored fiber placement
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U2 - 10.1016/j.cad.2021.103028
DO - 10.1016/j.cad.2021.103028
M3 - Article
AN - SCOPUS:85104995623
VL - 136
JO - CAD Computer Aided Design
JF - CAD Computer Aided Design
SN - 0010-4485
M1 - 103028
ER -
