DESIGN AND FABRICATION OF TRIPLY PERIODIC MINIMAL SURFACE POROUS GYROID STRUCUTRES FOR BIO MEDICAL APPLICATIONS USING FUSED DEPOSIT MODELING PROCESS

Abstract: This paper presents the efforts made in the design and fabrication of porous triply periodic minimal surface gyroid structure made of polylactic acid material in order to determine the difficulties faced while designing of porous structures produced with the fused deposit modeling for biomedical applications. The problem concerning with the fabrication of gyroid structure with conventional method. The work is focused on designing the gyroid triply periodic minimal surface polylactic acid structure and studying the design considerations of structures. The three-dimensional triply periodic minimal surface-based lattice structures with porosity ranging from 20% to 70% porosity were designed and fabricated. This work establishes the appropriate porosity to minimize the mismatch of elastic modulus between the implant and the bone by adding the porosity to the implant structure.

Keywords: Triply Periodic Minimal Surface, 3D printing, Fused Deposition Modeling Process, Gyroid, Porosity.