構造的非対称積層を有する複合材料パイプのたわみが生じない条件について

概要

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Composite pipes with structurally unsymmetric laminated configurations (SULC pipes) have been proposed by the authors. The deformation of a cantilevered SULC pipe under bending and twisting loads applied at its tip was analyzed, and it was shown that the SULC pipe has a torsionfree loading axis (TFLA), that is, a transverse load applied along this axis does not cause twist deformation, and such axis is concluded to be the elastic principal axis for the pipe. In this study, it is found the SULC pipe has a deflection-free loading axis (DFLA), that is, a transverse load applied along this axis does not cause deflection. This axis is different from the geometric principal axis of the pipe, and is a function of the laminate configuration. The relationship between positions of TFLA, DFLA, and the geometric principal axis is obtained. Structures made of isotropic materials generally do not have such DFLA. The relationship between the deflection curve of the pipe and loading condition is analyzed. The analytical results show good agreement with the experimental results. Coupling deformation produced by isotropic beams with unsymmetric elastic properties on the cross section is analyzed through comparison with the coupling deformation of the SULC pipes.
社団法人日本機械学会の論文
1994-02-25