| Summary |
The present paper discusses an analytical estimation for strength of test piece on the membrane materials under biaxial tension. In the analysis, FEM based on the 8-node isoparametric element are utilized. In the constitutive equations, the fabric lattice model previously proposed by author which can express the visco-elasto-plastic characteristics and fracture characteristics, are utilized. From the analytical results, the fracture strength of test piece under biaxial tension was low compared with fracture strength based
on the constitutive equations, because of the stress concentrations.
As future researches, the proposal of the examination method which stress concentration cannot produce easily is required. And experiments for verification of the fracture strength curve are required to be compared with the fabric lattice model.
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