Understanding Tensile and Fracture Behavior of Pla Specimens Fabricated Via Fused Deposition Modeling: Evaluating Thickness, Scale and Printing Sequence

摘要: Geometrical factors play a key role in determining the dimensional accuracy and mechanical properties of additively manufactured components. This research investigates the influence of thickness, scale, and printing sequence on Polylactic Acid (PLA) specimens produced via Fused Deposition Modeling (FDM) with special focus on tensile and fracture properties of the printed parts. The trends of experimental results were then linked to the microstructures and observations on failure mechanisms and the fabrication process conditions. Additionally, a boundary effect model was employed to evaluate fracture behavior of tested specimens, demonstrating its applicability as an engineering tool for fracture prediction of FDM parts with different scales and thicknesses. The findings of this work underscore the importance of considering geometric factors and printing strategies for effective design and failure analysis of additive manufacturing components.