面内捩りを受ける円形張力膜のしわ : ポリエステルフィルムとC種膜の実験

概要

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The problem of circular stretched membranes under inplane torsion is a typical example in studying wrinkling on membrane structures. In this paper experiments of the example are carried out. A feature of the experiment is that both isotropic polyester films and orthotropic coated fabrics are treated, since membranes used in spatial architectures are usually orthotropic. Few studies on wrinkling on orthotropic membranes can be found. Another feature of the experiment is that stresses in the wrinkled membranes are measured. For that purpose, first a method for measuring stresses in thin membranes is presented. Second stresses in the wrinkled circular membranes are measured by using the method, and finally principal stresses are obtained. The results show that (1)there are no compressive stresses in the wrinkled membranes, (2)directions of tensile principal stresses almost coincide with directions of wrinkles, and (3)in the coated fabrics, these two kinds of directions almost coincide with directions of fabrics. Photos of wrinkles on various kinds of membranes are also shown.
社団法人日本建築学会の論文
1997-04-30