Effective elastic properties of 3D printed auxetic metamaterials

The work was supported by the grant project TK 01030108 - NEMENUS of the Technology Agency of the Czech Republic within the institutional support RVO: 61388998.Mechanical metamaterials are artificially produced structures that derive their properties from their periodically repeated structure rather than from mechanical properties of their base material. Often, these structures are manufactured by 3D printing. Nowadays the additive manufacturing technology can be used for producing complex bodies with complicated shapes and various properties which cannot be produced by conventional technologies. Such structures can posses superior properties such as e.g. the negative Poisson?s ratio. These materials exhibit a counter-intuitive behaviour when under the uniaxial tension, the structure expands transversely and vice versa. Applications of 3D printed bodies can be found in mechanical, biomechanical or aerospace engineering