To model the deformation of fabric polymer composite materials highly nonlinear in tension along the warp/weft threads, an analytical approach is proposed. Based on experimental data and the method of a deformable polyhedron, a tool is developed for an efficient selection of parameters for the model of a fabric composite consisting of equivalent orthogonally stacked unidirectional layers. A new version of the FARGR software module is developed, which makes it possible to design hybrid carbon-aramid fabric composites that show a significant nonlinear (pseudoplastic) mechanical behavior in tension experiments. The strain was measured by the optical (DIC) method. The failure of a carbon fiber layer occurred by fragmentation with stable delamination. In combination with aramid fabrics, such a fracture mechanism leads to the appearance of an extended pseudoplasticity plateau and to a potential insensitivity of such composites to stress concentrators.
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Translated from Mekhanika Kompozitnykh Materialov, Vol. 56, No. 5, pp. 867-880, September-October, 2020.
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Leshkov, E.V., Sapozhnikov, S.B. Modeling the Nonlinear Deformation and Damage of Carbon-Aramid Fabric Composites in Tension. Mech Compos Mater 56, 591–600 (2020). https://doi.org/10.1007/s11029-020-09906-1
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DOI: https://doi.org/10.1007/s11029-020-09906-1