Influence of lattice geometry on energy absorption and puncture resistance in 3D-Printed ABS structures for advanced medical implants

This study explores the mechanical behavior and quasi-static puncture failure of additively manufactured (AM) Acrylonitrile Butadiene Styrene (ABS) with varying lattice structures. Mechanical properties such as tensile strength, flexural strength, interlaminar shear strength (ILSS), and energy absorption were tested according to ASTM standards. Among the designs, the triangular lattice structure showed superior performance, with a 4.97% increase in tensile strength (26.21 MPa), a 26.91% rise in flexural strength (43.11 MPa), and a 14.57% improvement in ILSS (6.29 MPa) compared to the square lattice. Quasi-static puncture testing using a stainless-steel hemispherical indenter revealed that the triangular structure achieved the highest total energy absorption (25.08 J) and specific energy absorption (0.611 J/g). These results demonstrate that triangular ABS lattices offer improved mechanical strength and puncture resistance, making them suitable for applications in biomedical implants and advanced engineering systems.