Paper number 1117

DESIGN OF BEAM STRUCTURES WITH BRAIDED COMPOSITE TUBES

Hiroyuki HAMADA¹, Yukiko AZUMI¹, Tsuyoshi NISHIWAKI², Akio TANGE¹, Asami NAKAI ³ and Nobuo TAKEDA³

1Advanced Fibro-Science, Kyoto Institute of Technology
Matsugasaki, Sakyo-ku, Kyoto 606-8585, JAPAN
2Research Institute of Sports Science, ASICS Corporation
2-1, 6-chome, Takatsukadai, Nishi-ku, Kobe 651-2271, JAPAN
3CCR, University of Tokyo
4-6-1 Komaba, Meguro-ku, Tokyo, JAPAN

Summary

The purpose of this study is the establishment of designing method of FRP braided structures by using the Computer Aided Engineering system. The target is a scaffold made of CFRP braided composite tubes, all the dimensions of the scaffold is 450mm. The designing method includes the following 3 stages. In these stages, the stability, structural safety and material safety are checked by using the eigenvibration, buckling and static stress analyses, respectively. According to our concept, the most stable braided structure has the largest eigenfrequency among the proposed structures. The structural safety of the structure selected was checked by the buckling load. The material safety was checked by the comparison between composite tube strength measured and stress analysis results. Finally the scaffold designed by the proposed method was actually fabricated. The weight of scaffold fabricated by CFRP braided composite decreases by 71 percent in comparison with the conventional scaffold.

Keywords

scaffold, CAE system, eigenvibration analysis, buckling analysis, safety factor.