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Investigation of microstructure and mechanical properties of 3D printed Nylon
Luleå University of Technology, Department of Engineering Sciences and Mathematics.
2017 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This thesis presents a multiscale investigation and characterization of additive manufactured Polyamide material using fused deposition modelling technique. Manufacturing was performed using Markforgeds – Mark one 3D printer.  A multiscale investigation dedicated to minimizing the effect of shape distortion during 3D printing are presented, focusing on both molecular alignment in microstructure and implementing internal structures in mesostructure. Characterization on samples investigating microstructure was performed with coefficient of linear thermal expansion measurement and 3-point bending experiment. Different samples with varying infill patterns are tested and results indicates an isotropic behaviour through the manufactured samples and implies no molecular alignment due to printing pattern. In meso-structure, an implemented internal pattern is investigated. All samples are measured with 3D scanning equipment to localize and measure the magnitude of shape distortion. Attempts to find relationships in shape distortion and porosity between the samples resulted in no observed trends. Compressive experiments where performed on samples in axial- and transverse directions resulting in anisotropic behaviour. The largest compressive stiffness is recorded in axial direction reaching 0,33 GPa. The study is done in collaboration with Swerea SICOMP and Luleå University of Technology.

Place, publisher, year, edition, pages
2017. , p. 45
Keyword [en]
Plastic, Nylon, Multiscale, Microstructure, Mesostructure Thermal distortion, Shape distortion, 3D printing, Additive manufacturing, Fused deposition modelling, FDM
National Category
Textile, Rubber and Polymeric Materials
Identifiers
URN: urn:nbn:se:ltu:diva-66304OAI: oai:DiVA.org:ltu-66304DiVA, id: diva2:1153278
External cooperation
Swerea SICOMP
Educational program
Materials Engineering, master's level (120 credits)
Supervisors
Examiners
Available from: 2017-11-17 Created: 2017-10-29 Last updated: 2017-11-17Bibliographically approved

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Textile, Rubber and Polymeric Materials

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CiteExportLink to record
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Citation style
  • apa
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  • nn-NB
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Output format
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