A novel combined tubular 3D-printed lattice structures with coupling effects for enhancing energy absorption

• The integrated cylindrical Lidinoid, Split P, and Neovius with PSHM have been introduced for the first time. • The PSHM model demonstrated a negative Poisson ratio. • The coupling effect was observed between the cylindrical TPMS and PSHM structures because of opposite Poisson ratios. • The energy absorption density of the novel INPSHM structure was enhanced by about 77.61 % in comparison to the individual Neovius model. • Parametric studies were implemented on the PSHM model to improve the energy absorption density of the INPSHM structure. The current investigation focuses on presenting a novel integration of cylindrical Triply Periodic Minimal Surfaces (TPMSs) and Peanut-Shaped Hole Metamaterial (PSHM) structures with enhanced energy absorption density, manufactured using a three-dimensional (3D) printing technique. The main aim of this study was to enhance the energy absorption density of the integrated structure by employing the coupling effect. To achieve this purpose, the mechanical performance of six distinct cylindrical TPMS structures, including Schwarz P, Lidinoid, Gyroid, Split P, Schwarz D, and Neovius, as well as the PSHM under quasi-static uniaxial compression was experimentally and numerically evaluated. All the models were designed using CATIA software and fabricated using the stereolithography (SLA) 3D printing method. Also, their mechanical behavior was meticulously simulated in ABAQUS software, and the numerical results were in good agreement with the experimental ones as the maximum error is less than 6.4 % . The numerical analysis revealed that the Neovius structure, which possessed the highest energy absorption density and Poisson’s ratio in comparison to other TPMS models, was integrated with the PSHM structure to intensify the coupling effect between them. The integrated cylindrical TPMS as Lidinoid, Split P, and Neovius with PSHM have been introduced for the first time. A meticulous investigation revealed that the novel integrated Neovius with PSHM (INPSHM) structure has the highest energy absorption density among the other integrated models. The tremendous achievements provide novel insight into the enhancement of the energy absorption density of INPSHM structure by approximately 77.61% in comparison to the individual Neovius model. Moreover, parametric analyses were performed on the PSHM model to improve the energy absorption density of the INPSHM structure.