Stochastic fracture of additively manufactured porous composites

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Keleş, Özgür Anderson, Eric H. Huynh, Jimmy Gelb, Jeff Freund, Jouni Karakoç, Alp 2018-11-09T13:06:41Z 2018-11-09T13:06:41Z 2018-12-01
dc.identifier.citation Keleş , Ö , Anderson , E H , Huynh , J , Gelb , J , Freund , J & Karakoç , A 2018 , ' Stochastic fracture of additively manufactured porous composites ' Scientific Reports , vol 8 , no. 1 , 15437 . DOI: 10.1038/s41598-018-33863-4 en
dc.identifier.issn 2045-2322
dc.identifier.other PURE UUID: 7c69e90b-3f08-48bb-8c21-8846ebab3d5e
dc.identifier.other PURE ITEMURL:
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dc.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. en
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Scientific Reports en
dc.relation.ispartofseries Volume 8, issue 1 en
dc.rights openAccess en
dc.subject.other General en
dc.subject.other 216 Materials engineering en
dc.title Stochastic fracture of additively manufactured porous composites en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department San Jose State University
dc.contributor.department Department of Mechanical Engineering
dc.contributor.department Department of Bioproducts and Biosystems
dc.subject.keyword General
dc.subject.keyword 216 Materials engineering
dc.identifier.urn URN:NBN:fi:aalto-201811095661
dc.identifier.doi 10.1038/s41598-018-33863-4
dc.type.version publishedVersion

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