Stochastic fracture of additively manufactured porous composites

Stochastic fracture of additively manufactured porous composites

Abstract Extrusion-based fused deposition modeling (FDM) introduces inter-bead pores into dense materials, which results in part-to-part mechanical property variations, i.e., low mechanical reliability. In addition, the internal structure of FDMed materials can be made porous intentionally to tailor...

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Autores principales: Özgür Keleş, Eric H. Anderson, Jimmy Huynh, Jeff Gelb, Jouni Freund, Alp Karakoç
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2018
Materias:
Stochastic Fracture
Raster Orientation
Fused Deposition Modeling (FDMed)
Weibull Modulus
FDMed Materials
Medicine
R
Science
Q
Acceso en línea:https://doaj.org/article/3f83fa067c3343efb4b048c393a3c968
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spelling oai:doaj.org-article:3f83fa067c3343efb4b048c393a3c9682021-12-02T15:08:58ZStochastic fracture of additively manufactured porous composites10.1038/s41598-018-33863-42045-2322https://doaj.org/article/3f83fa067c3343efb4b048c393a3c9682018-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-33863-4https://doaj.org/toc/2045-2322Abstract Extrusion-based fused deposition modeling (FDM) introduces inter-bead pores into dense materials, which results in part-to-part mechanical property variations, i.e., low mechanical reliability. In addition, the internal structure of FDMed materials can be made porous intentionally to tailor mechanical properties, introduce functionality, reduce material consumption, or decrease production time. Despite these potential benefits, the effects of porosity on the mechanical reliability of FDMed composites are still unclear. Accordingly, we investigated the stochastic fracture of 241 FDMed short-carbon-fiber-reinforced-ABS with porosity ranging from 13 to 53 vol.% under tensile load. Weibull analysis was performed to quantify the variations in mechanical properties. We observed an increase in Weibull modulus of fracture/tensile strength for porosity higher than ~40 vol.% and a decrease in Weibull modulus of fracture strain for an increase in porosity from 25 to 53 vol.%. Micromechanics-based 2D simulations indicated that the mechanical reliability of FDMed composites depends on variations in bead strength and elastic modulus of beads. The change in raster orientation from 45°/−45° to 0° more than doubled the Weibull modulus. We identified five different types of pores via high-resolution X-ray computed tomography. A 22% and 48% decrease in carbon fiber length due to extrusion was revealed for two different regions of the filament.Özgür KeleşEric H. AndersonJimmy HuynhJeff GelbJouni FreundAlp KarakoçNature PortfolioarticleStochastic FractureRaster OrientationFused Deposition Modeling (FDMed)Weibull ModulusFDMed MaterialsMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-12 (2018)
institution DOAJ
collection DOAJ
language EN
topic Stochastic Fracture
Raster Orientation
Fused Deposition Modeling (FDMed)
Weibull Modulus
FDMed Materials
Medicine
R
Science
Q
spellingShingle Stochastic Fracture
Raster Orientation
Fused Deposition Modeling (FDMed)
Weibull Modulus
FDMed Materials
Medicine
R
Science
Q
Özgür Keleş
Eric H. Anderson
Jimmy Huynh
Jeff Gelb
Jouni Freund
Alp Karakoç
Stochastic fracture of additively manufactured porous composites
description Abstract Extrusion-based fused deposition modeling (FDM) introduces inter-bead pores into dense materials, which results in part-to-part mechanical property variations, i.e., low mechanical reliability. In addition, the internal structure of FDMed materials can be made porous intentionally to tailor mechanical properties, introduce functionality, reduce material consumption, or decrease production time. Despite these potential benefits, the effects of porosity on the mechanical reliability of FDMed composites are still unclear. Accordingly, we investigated the stochastic fracture of 241 FDMed short-carbon-fiber-reinforced-ABS with porosity ranging from 13 to 53 vol.% under tensile load. Weibull analysis was performed to quantify the variations in mechanical properties. We observed an increase in Weibull modulus of fracture/tensile strength for porosity higher than ~40 vol.% and a decrease in Weibull modulus of fracture strain for an increase in porosity from 25 to 53 vol.%. Micromechanics-based 2D simulations indicated that the mechanical reliability of FDMed composites depends on variations in bead strength and elastic modulus of beads. The change in raster orientation from 45°/−45° to 0° more than doubled the Weibull modulus. We identified five different types of pores via high-resolution X-ray computed tomography. A 22% and 48% decrease in carbon fiber length due to extrusion was revealed for two different regions of the filament.
format article
author Özgür Keleş
Eric H. Anderson
Jimmy Huynh
Jeff Gelb
Jouni Freund
Alp Karakoç
author_facet Özgür Keleş
Eric H. Anderson
Jimmy Huynh
Jeff Gelb
Jouni Freund
Alp Karakoç
author_sort Özgür Keleş
title Stochastic fracture of additively manufactured porous composites
title_short Stochastic fracture of additively manufactured porous composites
title_full Stochastic fracture of additively manufactured porous composites
title_fullStr Stochastic fracture of additively manufactured porous composites
title_full_unstemmed Stochastic fracture of additively manufactured porous composites
title_sort stochastic fracture of additively manufactured porous composites
publisher Nature Portfolio
publishDate 2018
url https://doaj.org/article/3f83fa067c3343efb4b048c393a3c968
work_keys_str_mv AT ozgurkeles stochasticfractureofadditivelymanufacturedporouscomposites
AT erichanderson stochasticfractureofadditivelymanufacturedporouscomposites
AT jimmyhuynh stochasticfractureofadditivelymanufacturedporouscomposites
AT jeffgelb stochasticfractureofadditivelymanufacturedporouscomposites
AT jounifreund stochasticfractureofadditivelymanufacturedporouscomposites
AT alpkarakoc stochasticfractureofadditivelymanufacturedporouscomposites
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