| Summary |
A formulation of a modified tension field model, which can allow small constant compressive stresses in wrinkled membranes, is presented. The lower bound of compressive stresses allowed is controlled by a constant parameter, the choice of which has a great influence on mechanical behaviors of wrinkled membranes. Both a modified stress-strain relation and its incremental form, which is needed for nonlinear finite element analysis, are derived by using projection approach in explicit form. A buckling behavior of an inflatable cylindrical beam is investigated by using the presented tension field model to show the effectiveness of the presented formulation.
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