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Abstract
Fused Filament Fabrication is an Additive Manufacturing method that can produce bespoke components due to the high number of printing parameters available. Each of them plays a significant role in the final mechanical properties of the 3D printed device. This study aimed to uncouple the role of the mesostructure and crystallinity in the final mechanical performance of carbon black/PLA 3D printed samples as a function of the printing parameters. A thermodynamic model was developed to determine the influence of printing parameters, such as nozzle diameter and layer height, in the final crystallinity. Specimens were mechanically tested under uniaxial tensile loads to determine the main deformation and failure mechanisms and results showed that samples were strongly influenced by the printing direction. Furthermore, the nozzle diameter played a significant role in the mesostructure and failure mechanisms, resulting in large differences in ductility for samples printed at raster direction 45º. It was also found that the layer height had a strong influence on the temperature profile and the resulting crystallinity. The importance of crystallinity over porosity to improve the ductility of the material is a substantial contribution to the current state of the art. This work provides the basic fundamentals to manufacturing 3D printed components with tailored mechanical properties for specific loading conditions.
Original language | English |
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Article number | 117156 |
Number of pages | 36 |
Journal | Composite Structures |
Volume | 319 |
Early online date | 19 May 2023 |
DOIs | |
Publication status | Published - 1 Sept 2023 |
Keywords / Materials (for Non-textual outputs)
- Additive manufacturing
- Crystallinity
- Mechanical response
- Modelling
Fingerprint
Dive into the research topics of 'An experimental and numerical study of the mechanical response of 3D printed PLA/CB polymers'. Together they form a unique fingerprint.Research output
- 4 Article
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Development of an electro-thermo-mechanical 4D printed multi-shape smart actuator: experiments and simulation
Delbart, R., Robert, C., Truong Hoang, T-Q. & Martinez-Hergueta, F., Nov 2024, In: Composites Part A: Applied Science and Manufacturing. 186, 108381.Research output: Contribution to journal › Article › peer-review
Open AccessFile -
Electro-mechanical characterisation and damage monitoring by acoustic emission of 3D printed CB/PLA
Roumy, L., Truong Hoang, T-Q., Touchard, F., Robert, C. & Martinez-Hergueta, F., Mar 2024, In: Materials. 17, 5, 1047.Research output: Contribution to journal › Article › peer-review
Open AccessFile -
Multiscale characterisation of the electrical response of 3D printed carbon black Polylactic acid
Delbart, R., Noble, T., Roumy, L., Fernandez Toribio, J. C., Robert, C., Truong Hoang, T-Q. & Martinez-Hergueta, F., 19 Aug 2023, (E-pub ahead of print) In: Journal of Materials Science. 58, 32, p. 13118-13135Research output: Contribution to journal › Article › peer-review
Open AccessFile