Damage of additively manufactured polymer materials: experimental and probabilistic analysis

Damage of additively manufactured polymer materials: experimental and probabilistic analysis

This paper presents a study on the tensile, fracture, damage, and reliability properties of 3D printed polylactic acid (PLA), based on a series of experiments. The study focuses on polylactic acid (PLA) samples produced using fused filament manufacturing (FFF) technology, specifically examining unid...

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Bibliographic Details
Main Authors: Hachimi Taoufik, Ait Hmazi Fouad, Majid Fatima
Format: Article
Language:English
Published: Gruppo Italiano Frattura 2025-07-01
Series:Fracture and Structural Integrity
Subjects:
damage analysis
reliability analysis
3d materials
fused filament fabrication
crack length
Online Access:https://www.fracturae.com/index.php/fis/article/view/5465/4262
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Summary:This paper presents a study on the tensile, fracture, damage, and reliability properties of 3D printed polylactic acid (PLA), based on a series of experiments. The study focuses on polylactic acid (PLA) samples produced using fused filament manufacturing (FFF) technology, specifically examining unidirectional print orientations of 0�, 45�, and 90�. Tensile testing demonstrated significant anisotropy in mechanical behavior, The specimens oriented at 0� exhibited the highest tensile strength, while those at 90� showed the lowest. An increase in artificial crack length (a) resulted in a progressive decrease in the mechanical properties. Weibull analysis confirmed the presence of significant anisotropic behavior in 3D-printed PLA specimens, with ultimate stress (su0) values ranging from 39.82 MPa for the 90� orientation to 44.69 MPa for the 0� orientation, and elastic stress (se0) values from 35.49 MPa (90�) to 39.11 MPa (0�), indicating greater strength for the 0� oriented specimens. Damage evolution analysis showed accelerated damage, with the 90� orientation demonstrating the fastest rate of damage compared to the 0� and 45� orientations. This indicates that the 90� orientation is more vulnerable to crack propagation and has diminished structural integrity under stress.
ISSN:1971-8993

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