著者

邉 吾一 谷本 安浩 橋本 美穂

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.47, no.3, pp.287-292, 1998-03-15 (Released:2009-06-03)

参考文献数

2

被引用文献数

1 1

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The first experiment for obtaining the static transverse shear modulus and failure strain of CFRP Laminates is presented in this paper. In order to obtain these values, the difference in vertical displacement of two points on the neutral axis of a short beam specimen is measured by a newly devised electro-optical extensometer. The transverse isotropy is first confirmed by our proposed method. Furthermore, the experimental results of transverse shear modulus and failure strain are compared with those based on a classical lamination theory and a three dimensional FEM code, respectively.

著者

坂田 憲泰 岸谷 直美 邉 吾一

出版者

The Japan Society for Composite Materials

雑誌

日本複合材料学会誌 (ISSN:03852563)

巻号頁・発行日

vol.37, no.3, pp.111-118, 2011 (Released:2012-02-25)

参考文献数

5

被引用文献数

1

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Isogrid structures have a higher specific strength and stiffness, they are composed of triangular grid stiffeners and a face layer. One of features in isogrid structures is the offset part which is effective for avoiding stress concentration at the cross points of grid stiffeners. These structures are being mainly used for aerospace applications. In order to produce a metal isogrid cylindrical shell, a majority of thick metal plate is milled to produce the isogrid panel and then its both ends are welded to each other. Therefore, unstable behaviors of isogrid structures are generally observed in the joint parts. However, the CFRP isogrid cylindrical shell can be simultaneously fabricated the parts of shell and grid with a filament winding method. In this study, a molding of isogrid CFRP cylindrical shells is proposed and their compression tests are also conducted to investigate the stiffening effects of isogrid CFRP cylindrical shell. Furthermore, the results of the compression tests are compared with numerical ones obtained by FEM.