Experimental data for compression tests on periodic and graded tensegrity-inspired metamaterials

The dataset contains the results of experimental tests performed on four configurations of additively manufactured tensegrity-inspired metamaterials. The analysed specimens include periodic and graded lattice architectures designed for two loading scenarios: uniform compression and concentrated compression. Specifically, the dataset comprises results for periodic and graded metamaterials with a soft-layer gradation under uniform load, as well as periodic and graded metamaterials with concentric gradation under concentrated load.

All specimens were fabricated using the ProJet MJP 2500 Plus printer by 3D Systems and manufactured from VisiJet M2R-WT resin, which according to the technical data sheet has a tensile modulus of 2000 MPa, tensile strength of 39 MPa, and elongation at break of 20% (values determined according to ASTM D638).

The lattices were subjected to quasi-static uniaxial compression tests using a universal testing machine INSTRON 5567 equipped with a load cell INSTRON 2525-816 with a measurement accuracy of 0.5 N. The tests were carried out under displacement control at a constant loading rate of 5 mm/min, while the corresponding force values were recorded directly by the testing machine. During testing, the specimens were placed between grease-coated loading plates to minimise friction and allow unrestricted deformation of the lattice nodes.

The dataset includes raw force-displacement data obtained from compression tests performed on five specimens for each metamaterial configuration. The provided data correspond to the experimental results used to evaluate stiffness, load-bearing capacity, deformation mechanisms, and specific energy absorption of the analysed tensegrity-inspired metamaterials.