| The in-depth contents |
| Publication year |
1994 |
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| Title |
Analysis and Experiments on the Wrinkｌing of Stretched Circular Membranes under In-plane Torsion |
| Author |
Tomoshi MIYAMURA,Yasuhiko HANGAl
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| Summary |
The shape of wrinkles on membrane structures depends on the stress field. In this paper，we investigate the stress field on wrinkled membranes by carrying out experiment and numerical analysis. We treat the circular stretched membrane under in-plane torsion，which is the classical problem in the study of wrinkling.
In the experiment using isotropic elastic membrane， the rate of increases of strains changes when wrinkling occurs. This shows that occurrence of wrinkles is a bifurcation phenomena. The principal stresses are evaluated from the strains that are measured by using three directional strain gages. It is found that there exists compression on the wrinkled membrane.
The shapes of wrinkles and stresses are computed by employing geometrically nonlinear finite element method. The difference between the shape of wrinkles and stresses on isotropic membrane and those on orthotropic membrane is shown. Directions of wrinkles almost coincide with the axes of elastic symmetry in orthotropic membrane.
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