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- W3105817532 abstract "This work describes the in-plane uniaxial tensile mechanical properties of two-dimensional graded rectangular perforations metamaterials using numerical homogenization finite element approaches benchmarked by experimental results. The metamaterial configuration is based on graded patterns of centre-symmetric perforated cells that can exhibit an auxetic (negative Poisson’s ratio) behavior. Global and local equivalent mechanical properties of the metamaterial are measured using digital image correlation techniques mapped over Finite Element models to identify strain patterns and related stress distributions at different scales. The samples and their numerical counterpart are parametrized against the spacing and aspect ratios of the cells. The overall stiffness behavior of the graded perforated metamaterial plates features a higher degree of compliance that depends both on the geometries of the cells of the graded areas, but also on the graded pattern used. Local Poisson’s ratio effects show a general constraint of the auxetic behavior compared to the case of uniform plates, but also interesting and controllable shape changes due to the uniaxial tensile loading applied." @default.
- W3105817532 created "2020-11-23" @default.
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- W3105817532 date "2021-04-01" @default.
- W3105817532 modified "2023-10-12" @default.
- W3105817532 title "Two-dimensional graded metamaterials with auxetic rectangular perforations" @default.
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- W3105817532 doi "https://doi.org/10.1016/j.compstruct.2020.113313" @default.
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