| Summary |
The present study aims at confirming the elasto-plastic characteristics of ETFE film under the biaxial tensions. First, in the uni-axial loading tests, the characteristics of the film with different thickness are analyzed. Second, in the bi-axial loading tests with several stress ratios, it is examined that the relationships of equivalent stress and equivalent plastic strain satisfies the yield criterion of Mises and the hypothesis of strain-hardening. Third, the pressurizing examination concerning plane film with square boundary is executed. And the analysis that mitates the examination is executed.
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