3 織構造格子モデルに基づいた膜材料の構成方程式に関する研究 : 繰り返し載荷に対する応力・ひずみ関係の実験と解析との比較

概要

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The paper discusses the validity of the formerly proposed constitutive equations for fabric membranes under cyclic loadings. Based on the experiments and analyses, the equations for analyses consider the crimp interchange and material nonlinearties of the yarns and coatings and include the interaction between the yams and coatings as a nonlinear continuum. Therefore, the equations have a form which can be directly applied to FEM analysis. In the experiments two types of bi-axial loading tests and a shear loading test were performed. In one of the bi-axial loading tests the tensile stress ratio was kept constant during all the process of this experiment, and in another one the ratio was changed during the cyclic loading depending on the change of stress ratio. Shear loading test was executed by controlling shear strain with initially introduced tension stresses. The validity of the proposed constitutive equations was confirmed by comparing the stress-strain relationships of analytical results with those from experiments under cyclic loadings.
一般社団法人日本建築学会の論文
1997-03-20