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Investigating the interfacial adhesion in continuous carbon-fiber embedded PLA matrix composites
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School of Engineering |
Master's thesis
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en
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61
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Abstract
Additive manufacturing of continuous fiber embedded parts is a new approach to produce composites with new designs and materials. However, in order to achieve better quality, it is crucial to understand how printing parameters affect material properties.
This study aims to gather insight into additive manufacturing of continuous carbon-fiber embedded Polylactic acid (PLA) parts. The effect of parameters such as the embedded length of carbon fiber and the infill density of PLA is investigated, and the results are compared to see if there is any relation. It is found that both the embedded length and the infill density directly affect the volumetric fraction of the fiber-matrix interface, thus affecting peak load. Increasing the embedded length and the infill density increases the contact area between the carbon-fiber and the matrix, which increases the peak load of the sample under tensile force.
Knowing how the printing parameters affect the interfacial adhesion between the fiber and the matrix can give an opportunity to optimize these properties for the best performance of the continuous fiber composites produced with additive manufacturing. It can also be the first step to improve the capabilities of this method for new designs and materials and fully-commercialize it in new sectors.