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Volume 34 (2008)
- Issue 6 Pages 211-
- Issue 5 Pages 173-
- Issue 4 Pages 133-
- Issue 3 Pages 95-
- Issue 2 Pages 51-
- Issue 1 Pages 3-
Volume 34, Issue 6
Displaying 1-3 of 3 articles from this issue
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Research paper
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Goichi BEN, Nao SUGIMOTO, Yoshio AOKI, Hyoung-Soo KIM, Yuka IIZUKA2008 Volume 34 Issue 6 Pages 211-218
Published: 2008
Released on J-STAGE: July 15, 2010
JOURNAL FREE ACCESSCarbon fiber reinforced plastic (CFRP) laminates are used in various industrial fields because they have excellent properties of the specific strength and specific stiffness. The CFRP has a potential of weight reduction in the automotive structure which can contribute to the improvement of mileage as well as the reduction of carbon dioxide. On the other hand, the safety issue in case of collision should be also clarified for employing the CFRP as automotive structures. In this paper, Al alloy beams reinforced with the CFRP were examined by both experiments and numerical analysis as candidates to replace the conventional steel door guarder beam used inside the automotive door. The experimental relations of impact loading to the deformation of the Al alloy beams with different thicknesses, widths and types of CFRP showed a good agreement with those of numerical results. These results show that the numerical method developed here is useful for estimating the impact behavior of Al guarder beams with CFRP layers.View full abstractDownload PDF (1889K) -
Limin BAO, Natsuki KAMADA, Danna QIAN, Tomohiro SHIRAYI, Sotomi GOTOU, ...2008 Volume 34 Issue 6 Pages 219-225
Published: 2008
Released on J-STAGE: July 15, 2010
JOURNAL FREE ACCESSA thin cylinder of fiber-reinforced plastics (FRP) material is used as a kind of structure material in large quantities for robot arms, ariplanes and aerospace applications because of its lightweight and high strength. In order to improve the mechanical properties of the cylinder, this study developed the biomimetic design of a thin cylinder with nodes that imitate a bamboo structure by the VaRTM method. The effects of inserted nodes on the bending properties of a thin CFRP cylinder were examined by the four-point bending test. It is evident that the flexural rigidity and bending buckling load were increased; the validity of the node has also been confirrnedView full abstractDownload PDF (2915K) -
Keiko WATANABE, Takayuki KUSAKA, Masaki HOJO, Toshiyasu FUKUOKA, Masay ...2008 Volume 34 Issue 6 Pages 226-232
Published: 2008
Released on J-STAGE: July 15, 2010
JOURNAL FREE ACCESSThe crack propagation behavior of CFRP laminates reinforced with Zanchor was experimentally investigated to find out the toughening mechanism under the mode II loading. The Zanchor is a novel technique of out-of-plane reinforcement to improve the interlaminar strength by entangling in-plane fibers in the through-thickness direction using special needles. Experimental result demonstrated that the effect of Zanchor process was remarkable for the improvement of mode II interlaminar fracture toughness of composite materials, where the fracture toughness proportionally increased with the Zanchor density. Moreover, broken traces of the fiber bundles oriented to the through-thickness direction were observed, whereas no fiber bridgings. Therefore, it was revealed that the key factor of the increase in mode II fracture toughness would be the breaking energy of fiber bundles, which was different from that under mode I loading.View full abstractDownload PDF (2048K)
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