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Material Tests of 3D FGM

Graded stiffness Values of three Additive fabrication probes with 3D heterogenous properties

The following experiment investigates the creation of a three-dimensionally gradient material with varying degrees of stiffness with the aid of additive fabrication. The experiment employs a performance profile that is created through finite element analysis (FEA) for the creation of locally different mechanical properties. In the last step the physical probe in the dimensions 100mm x 100mm x 25mm will be mechanically tested to critically access the design methodology and material behavior.

It is claimed that a material can be produced with additive fabrication techniques that has a three dimensional zones of gradually varying stiffness. The experiment proposes a geometric assembly that is composed of a matrix geometry that has a three dimensional array of identical spheres with a gradually differing materiality embedded. Each sphere inhabits hereby a lattice cell of 2mm x 2mm x2mm with a radius of 0.9mm and a resolving distance to the lattice´s edge of 0.1mm. This spatial grid divides the entire virtual probe block into 50 x 50 x 12 modular units. Different material properties will be later assigned to the individual spheres in the lattice structure to be manufactured with the aid of the Connex technology.

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