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Abstract
The results are presented of experimentally investigating tension of gas-impermeable packages of woven metal grids formed by freely stacking up grid layers, maintaining the orientation of the wires. The results of experimentally studying tension of grid packages in the direction of wires show that their pre-cogging normally to the grid layers produces a considerable effect - it increases the tensile strength of the pre-cogged package. This effect can be observed even in a single grid layer. To identify the mechanism of this increase, cogging and tension of a single grid layer is numerically modeled in a 3D-formulation. Based on the results of numerical modeling it is found out that in the cross-sections of the wires large zones of residual compression stresses are present, which result in increasing the tensile strength of the specimen in the layer plane. Keywords: woven grid, orthotropy, static compression, tension, non-linearity, elasto-plasticity, numerical modeling, experiment, contact, finite element method.
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