![]() ![]() The decrease of tensile strength mainly caused by the incompatibility between the rPS and LDPE phases. The tensile strength and modulus of printed specimens with rPS/LDPE were decreased due to the increase of LDPE content. However, the tensile strength of printed specimens with rPS/LDPE blends were lower than printed specimen with neat rPS. The formulated rPS/LDPE blend with different blend ratio exhibited a good printability when the printing temperature and extrusion rate fixed at 240☌ and 120%. For this research, the recycled polystyrene (rPS) was extracted from Styrofoam waste and blended with low-density polyethylene (LDPE), then extruded into filament using a filament extruder. This research demonstrates an alternate recycling method of Styrofoam waste by converting it into 3D printing filament for Fused Deposition Modelling (FDM). ![]() Styrofoam is a non-biodegradable material which its disposal causes serious environment issues. Styrofoam is widely used as packaging material for many applications like home furniture and electrical appliance. Our results show how each type of unit cell structure is suitable for each specific type of human bone. The deviation between the lab results and the simulated ones was up to 10%. The average Young’s modulus values were 11 GPa, 9 GPa, and 8 GPa for the Octahedral lattice type, both the 3D lattice infill type and the double-pyramid lattice and face diagonals type, and the double-pyramid lattice with cross type, respectively. Detailed comparative analysis was conducted between the laboratory and the numerical results. Stress–strain characteristics were determined, and the effective Young’s modulus was calculated. Ti6Al4V was selected as the material for the samples. Three samples of each unit cell type were 3D printed, using direct metal laser sintering technology, and tested according to the ISO standards. Four types of unit cell were designed using the ANSYS software and investigated through comparison between the results of laboratory compression tests and those of the finite element simulation. The purpose of this study was to investigate the effects of different lattice structures under laboratory conditions and in a numerical manner to choose the best unit cell design, able to generate a structure as close to that of human bone as possible. The focus is on enhancing the structure of the implants to improve their biomechanical properties, thus reducing the imperfections for the patient and increasing the lifespan of the prosthesis. The development of medical implants is an ongoing process pursued by many studies in the biomedical field. ![]()
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