Researchers Delve Further Into 3D Printing Mechanical Metamaterials http://bit.ly/2Srerx0 Researchers from the Netherlands and Italy have recently published their findings on complex 3D printing research in Multi-material 3D printed mechanical metamaterials: Rational design of elastic properties through spatial distribution of hard and soft phases, authored by M.J. Mirzaali, A. Caracciolo, H. Pahlavani, S. Janbaz, and A.A. Zadpoor. Exploring the creation of mechanical metamaterials beyond previous designs of geometrical micro-architectures, a research team consisting of scientists from TU Delft and the Department of Mechanical Engineering, Politecnico di Milano worked with 3D printed lattice structures to make multi-material cellular solids. The ultimate goal was to customize the elastic modulus and unusual properties like Poisson’s ratio in varying directions. Other unusual properties in mechanical metamaterials include:
Some previous studies have been performed so far with negative Poisson’s ratio in hopes of manipulating properties for metamaterial functions.
For this study, the team combined new geometrical designs with complex spatial distributions, 3D printed, to customize the Poisson’s ratio and the elastic modulus. They also used computational models in the design process, after which many different samples were 3D printed, with three different unit cells put into use. An Object500 Connex3 3D printer was used to make the fifteen samples used, with five being left soft and the others made with multiple materials. Hard samples were printed with VeroCyan, while soft were made with Agilus30 Black. Gripping systems and pins were also created, using an Ultimaker, 3D printing with PLA.
Accuracy was confirmed for ‘numerical simulations’ by measuring them against testing models.
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Printing via 3DPrint.com | The Voice of 3D Printing / Additive Manufacturing https://3dprint.com December 29, 2018 at 03:06AM
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