Compressive mechanical property of a new three-dimensional aluminum based double-V lattice structure

Abstract A new three-dimensional (3D) double-V lattice structure intersected by two-dimensional (2D) double-V structures with negative Poisson's ratio was designed and fabricated by 3-D printing combined with investment casting method. The compressive mechanical behavior and the related mechanism of the new double-V structures have been analyzed. It is shown that the new structure shows a gradual hardening characteristic in the “plateau stage” and exhibits tunable auxetic behavior with varied structure parameters, i.e., the auxetic behavior becomes more pronounced as θ1 and θ2 decrease.