Mechanical, microstructural and numerical investigations of 3D printed carbon fiber reinforced PEEK

Allouch, Marwa; Ben Fraj, Boutheina; Dhouioui, Manel; Kesssentini, Amir; Hentati, Hamdi; Wali, Mondher; Ferhi, Mounir

doi:10.1177/09544062231190534

Cited by 2 publications

(2 citation statements)

References 29 publications

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Section: Resultssupporting

confidence: 93%

“…The observed failure mode substantiates the brittle response of this sample for an RA of 90°. This result aligns with findings reported for the carbon fiber-reinforced polyether ether ketone 25 and carbon fiber-reinforced PLA. 26 It can be deduced that the inclination of the printing orientation relative to the loading path axis is able to dramatically deteriorate the mechanical performances of the printed composite.…”

Section: Effect Of Raster Anglesupporting

confidence: 93%

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Mechanical performances of printed carbon fiber-reinforced PLA and PETG composites

Ammar,

Ben Fraj,

Hentati

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part L:

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In this study, the 3D printing technology was adopted to produce carbon fiber-reinforced polylactic acid and polyethylene terephthalate glycol composites. Fused deposition modeling process was conducted at different settings of printing parameters, specifically, raster angle, printing speed, and extrusion temperature. Each of the selected printing parameters has a key role in making the best-printed part in terms of layer-by-layer deposition quality and mechanical performance. To examine how these process parameters affect the behavior of the printed parts, tensile tests were performed and mechanical properties were assessed. It was reported that the printing orientation, characterized by the raster angle, can be identified as the determining factor to define the fracture mode. Composite parts printed with 0° raster angle, aligning with the tensile loading path, exhibit the highest levels of stiffness and ductility. Ductile and brittle fractures corresponding to 0° and 90° raster angles, respectively, were illustrated through optical observations of failure profiles. Furthermore, the tensile test indicates that higher printing speed leads to a significant deterioration in mechanical performances, notably reducing the stiffness of the printed structures. Scanning electron microscopy analysis confirmed that increasing the printing speed results in greater porosity within the structure, thereby weakening its mechanical strength. Regarding the extrusion temperature, it was shown that elevating it enhances the mechanical characteristics of the printed parts, particularly in terms of strength and ductility. Referring to microstructural observations, this outcome is attributed to the improved adhesion between the deposited layers and the reduction in porosity at high extrusion temperature.

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Section: Resultssupporting

confidence: 93%

Section: Effect Of Raster Anglesupporting

confidence: 93%

Mechanical performances of printed carbon fiber-reinforced PLA and PETG composites

Ammar,

Ben Fraj,

Hentati

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part L:

Self Cite

View full text Add to dashboard Cite

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Behavior of sandwich structures with 3D-printed auxetic and non-auxetic cores under low velocity impact: Experimental and computational analysis

Allouch,

Mellouli,

Mallek

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part C:

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In recent years, impact-resistant structures are highly sought after in various fields such automotive and aerospace applications as they proved notable performances, garnering significant success. The aim of this study is to assess the behavior of the 3D-printable honeycombs subjected to low velocity impact, for providing insights into absorbed energy for different core designs: hexagonal, auxetic, and rectangular, considering an equal number of cells across all designs. This work reports the computational and experimental studies conducted for sandwich structures under different impact loading. The experimental impact tests are carried out using a drop weight impact-testing machine. The examined specimen comprises two face-sheets and architected cell core fabricated through the Fused Filament Fabrication (FFF) process made of polylactic acid (PLA). Variations in the geometric design of the cells result in the formation of cores with auxetic and non-auxetic topologies. Uniaxial tensile tests are performed to identify the mechanical properties of the involved biopolymer. The second attempt consists on comparing three architectural core structures under impact test using experimental and computational methods. Our findings highlight the specific influence of core topology on energy absorption in 3D-printed sandwich structures. Results indicate that while all three configurations (hexagonal, re-entrant, and rectangular) demonstrate comparable energy absorption values, the specific mechanisms and efficiencies vary, with re-entrant cores exhibiting distinct behaviors under impact.

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Mechanical, microstructural and numerical investigations of 3D printed carbon fiber reinforced PEEK

Cited by 2 publications

References 29 publications

Mechanical performances of printed carbon fiber-reinforced PLA and PETG composites

Mechanical performances of printed carbon fiber-reinforced PLA and PETG composites

Behavior of sandwich structures with 3D-printed auxetic and non-auxetic cores under low velocity impact: Experimental and computational analysis

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