Mechanical behaviour of 3D-printed metamaterials with tunable stifness
Keywords:
metamaterials, additive manufacturing, tunable compressive stiffnessAbstract
The concept of mechanical metamaterials has received special attention during the last years due to the advances in additive manufacturing techniques that allows fabrication of structures with complex architectures. The special design of metamaterials micro architecture offers the possibilities to obtain unprecedented mechanical properties that could be exploited to create advanced materials with novel functionalities. This paper presents the design, fabrication and testing of cellular metamaterials obtained by fused deposition molding, an affordable additive technology. Cellular structures with comparative cell dimensions but different geometries have been printed out and subjected to uniaxial compression test. The understanding of mechanical behavior of proposed structures leads to the possibility to create metamaterials with tunable compressive or bending stiffness. For the designed cellular metamaterials the results of experimental investigations are compared with those obtained by finite element analysis.
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