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.本数据集包含针对四种构型的增材制造类张拉整体超材料（tensegrity-inspired metamaterials）开展的实验测试结果。所分析的试样涵盖针对两种加载工况设计的周期性与梯度点阵结构：均匀压缩与集中压缩。具体而言，本数据集包含均匀载荷下采用软层梯度的周期性及梯度超材料的测试结果，以及集中载荷下采用同心梯度的周期性及梯度超材料的测试结果。 所有试样均由3D Systems公司的ProJet MJP 2500 Plus打印机制造，所用材料为VisiJet M2R-WT树脂；根据该材料的技术数据表，其拉伸模量为2000 MPa，拉伸强度为39 MPa，断裂伸长率为20%（测试依据ASTM D638标准执行）。 本次点阵结构测试采用配备INSTRON 2525-816型测力传感器（测量精度0.5 N）的INSTRON 5567型万能试验机，开展准静态单轴压缩试验。试验采用位移控制模式，加载速率恒定为5 mm/min，试验机直接记录对应载荷数值。测试过程中，试样置于涂有润滑脂的加载压板之间，以降低摩擦并允许点阵节点无约束变形。 本数据集包含每种超材料构型下5个试样的压缩试验原始力-位移数据。所提供的实验数据可用于评估所分析的类张拉整体超材料的刚度、承载能力、变形机制以及比吸能性能。