Damage in extrusion additive manufactured parts: effect of environment and cyclic loading

“…This degradation could also be influenced by the process parameters, architecture, interface, voids. Amirpasha and Moetazediana et al 19 studied the hydrolytic degradation of PLA used in 3D for medical application; they found that the unavoidable interface between 3D-printed layers did not affect the long-term performance of printed parts. The main hydrolytic degradation consists in the first stage of the increase of the crystallinity due the hydrolyzed amorphous regions then the reduction of molecular weight.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of 3D printed parts: Effect of ultraviolet PLA filaments ageing and water absorption

Souissi

Bennour

Khammassi

et al. 2022

Journal of Elastomers & Plastics

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In additive manufacturing, fused deposition modelling (FDM) is one of the most often-used technologies. Polylactic Acid (PLA) is the most frequently applied polymer for prototyping or for real uses. This study mainly focuses on the mechanical properties of PLA parts printed with filament exposed to UV light to mimic the effect of recycled filament. Three radiation periods were studied, respectively, 24 h, 48 h and 72 h. Tensile tests were carried out to characterize the influence of building orientation (On flat/on-edge) and raster angles (0°, 45°, 90°, 0°/90°, −45°/+45°). Failure modes were also discussed. Printed specimens were subjected to water absorption to assess the mechanical properties in real application. Generally with the same raster angle, the interlayer structure of specimens manufactured in on-edge orientation has greater adhesion than the specimens in flat orientation. The results show that mechanical properties are lower in case of flat building orientation and the raster angle has the same trend in both orientations. Elsewhere, edge orientation exhibited lower water absorption thanks to the inwall that protected the printed part. UV radiation enhances the interface between printed layers for the lower period. The mechanical properties were affected by the degradation of the bulk material in the direction of 90°.

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Fracture mechanisms of additively manufactured polylactide: Effect of in vitro hydrolytic degradation

Moetazedian

Gleadall

Silberschmidt

2022

Engineering Fracture Mechanics

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Damage in extrusion additive manufactured parts: effect of environment and cyclic loading

Cited by 4 publications

References 6 publications

Damage in extrusion additive manufactured biomedical polymer: Effects of testing direction and environment during cyclic loading

Damage in extrusion additive manufactured biomedical polymer: Effects of testing direction and environment during cyclic loading

Mechanical properties of 3D printed parts: Effect of ultraviolet PLA filaments ageing and water absorption

Fracture mechanisms of additively manufactured polylactide: Effect of in vitro hydrolytic degradation

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