Sandwich structures with repairable cores based on truncated cube cells

With dramatic increase in 3D printing applications industry, sandwich panels with printed cores have gained a lot of attention recently. In harmony global movement towards sustainability and low-carbon emission industries, easy-to-repair cost-effective would be very attractive structures. this regard, implementing separated cells for constructing lattice structures instead using back-to-back makes repairing local damages the core easier more cost-effective. Ideally, damaged cell can replaced an intact new without need to change whole structure. study, mechanical responses single truncated cube unit cell, well-known geometry regular lattices has been studied analytically, numerically, experimentally. Analytical relationships were derived stiffness, yield stress, Poisson's ratio cell. Samples tested mechanically large deformation regime. A good agreement between results from analytical derivations, numerical simulations, experiments was observed. It shown that equilateral structure stress at least twice simple Three types repairable different uniform densities as well four graded well. The functionally presented best performance while considering both energy absorption capacity mass. (Type 4) showed specific (SEA) by almost 21% decrease maximum displacement 2.5% respect second-ranking option.