INVESTIGATION OF MECHANICAL PROPERTIES OF SLA 3D PRINTED RESIN IN BENDING MOMENT ANALYSIS USING FINITE ELEMENT METHOD
Abstract
This study investigates the mechanical properties of Stereolithography (SLA) 3D printed resin in bending moment analysis using the Finite Element Method (FEM). With the growing adoption of SLA in healthcare and manufacturing, understanding mechanical performance of SLA-printed components, particularly in bending, is crucial. The research evaluates influence of printing parameters and material composition on flexural strength and flexibility of dental resin samples. It examines internal geometries such as triangle and honeycomb structures and varying thickness-to-height ratios affecting bending strength. Bending tests followed ASTM D790 standards and results were compared with FEM simulations to validate material behavior. Simulations were performed using Abaqus Student 2025 software under conditions matching experimental tests. Results show geometry and thickness-to-height ratio significantly affect bending strength, with triangle geometry outperforming honeycomb. Samples with triangle geometry and 4.5 mm ratio achieved highest bending strength of 62.743 MPa, while honeycomb 9 mm reached 55.943 MPa. Post-processing such as UV curing improves mechanical properties of resin. This study provides insights for SLA 3D printing applications in dental prosthetics and offers a framework to optimize printing parameters for performance. It contributes to the development of predictive modeling combining FEM and experimental validation for improved design of additively manufactured resin components in biomedical applications. Future work will explore broader geometries, different resin formulations, and more complex loading conditions to enhance accuracy and reliability of simulation-based design methods for SLA printed structures in engineering and medical fields as well as improve clinical applicability in dental prosthetic fabrication processes and patient outcomes overall performance.
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