Mechanical behaviour of 3D printed composite parts with short carbon fiber reinforcements

Somireddy, Madhukar; Singh, Chandra Veer; Czekanski, Aleksander

doi:10.1016/j.engfailanal.2019.104232

Cited by 97 publications

(44 citation statements)

References 39 publications

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“…The strain at break ε B , is found to be decreasing with an increase in fiber length for PCF 3D printed specimens, this phenomenon is addressed by several authors, 25,34,43–46 where the polymer chain mobility is heavily constrained due to incorporation of rigid CFs and also enhanced fiber‐matrix cohesion. In addition, both PCF and MLF 3D printed specimens showed highly anisotropic properties due to the fact that most of the fibers are aligned in the flow direction 41,46–48 …”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Impact of processing conditions and sizing on the thermomechanical and morphological properties of polypropylene/carbon fiber composites fabricated by material extrusion additive manufacturing

Savandaiah

Maurer

Gall

et al. 2020

J of Applied Polymer Sci

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For the 3D printed composites, fiber alignment is affected by the direction of melt‐flow during extrusion of filaments and subsequently through the printing nozzle. The resulting fibers orientation and the fiber‐matrix compatibility have a direct correlation with mechanical properties. This study investigates the impact of processing conditions on the state of the carbon fiber types and their orientation on the mechanical properties of 3D‐printed composites. Short and long carbon fibers were used as starting reinforcing materials, and the state of fibers at the beginning and on the printed parts were evaluated. Strong anisotropy in terms of mechanical properties (flexural and impact properties) was observed for the samples printed with different printing orientations. Interestingly, the number of voids in the printed composites was found to be correlated with the fiber types. The present work provides a step towards the optimization of tailored composite properties by additive manufacturing.

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Section: Resultsmentioning

confidence: 99%

“…In addition, both PCF and MLF 3D printed specimens showed highly anisotropic properties due to the fact that most of the fibers are aligned in the flow direction. 41,[46][47][48]…”

Section: F I G U R E 8 3d Viewsmentioning

confidence: 99%

Impact of processing conditions and sizing on the thermomechanical and morphological properties of polypropylene/carbon fiber composites fabricated by material extrusion additive manufacturing

Savandaiah

Maurer

Gall

et al. 2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…In this study, an experimental approach with a fractional orthogonal array design [10] was conducted to investigate the effect of various processing factors on the mechanical properties of 3D-printed carbon fiber-reinforced (CFR)-PLA parts [11,12], so as to optimize the printing process. After printing, the mechanical properties of the printed CFR-PLA parts was measured by tensile and impact testers, while their morphology was characterized by a scanning electron microscope (SEM).…”

Section: Introductionmentioning

confidence: 99%

Parameters Affecting the Mechanical Properties of Three-Dimensional (3D) Printed Carbon Fiber-Reinforced Polylactide Composites

Lee

2020

Polymers

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Three-dimensional (3D) printing is a manufacturing technology which creates three-dimensional objects layer-by-layer or drop-by-drop with minimal material waste. Despite the fact that 3D printing is a versatile and adaptable process and has advantages in establishing complex and net-shaped structures over conventional manufacturing methods, the challenge remains in identifying the optimal parameters for the 3D printing process. This study investigated the influence of processing parameters on the mechanical properties of Fused Deposition Modelling (FDM)-printed carbon fiber-filled polylactide (CFR-PLA) composites by employing an orthogonal array model. After printing, the tensile and impact strengths of the printed composites were measured, and the effects of different parameters on these strengths were examined. The experimental results indicate that 3D-printed CFR-PLA showed a rougher surface morphology than virgin PLA. For the variables selected in this analysis, bed temperature was identified as the most influential parameter on the tensile strength of CFR-PLA-printed parts, while bed temperature and print orientation were the key parameters affecting the impact strengths of printed composites. The 45° orientation printed parts also showed superior mechanical strengths than the 90° printed parts.

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“…Subsequently, short fibers were added to the resin matrix via premixing to form high-performance thermoplastic resin composites. The main research includes fiber content and length control, process parameter optimization, and printing accuracy adjustment [9][10][11]. The tensile strength of the printed component is usually in the range of 10-100 MPa, and the modulus of elasticity is usually in the range of 1-9 GPa [12,13].…”

Section: Introductionmentioning

confidence: 99%

Interfacial Bonding Mechanism and Mechanical Performance of Continuous Fiber Reinforced Composites in Additive Manufacturing

Fan

Shan

Zou

et al. 2021

Chin. J. Mech. Eng.

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The additive manufacturing of continuous fiber composites has the advantage of a high-precision and efficient forming process, which can realize the lightweight and integrated manufacturing of complex structures. However, many void defects exist between layers in the printing process of additive manufacturing; consequently, the bonding performance between layers is poor. The bonding neck is considered a key parameter for representing the quality of interfacial bonding. In this study, the formation mechanism of the bonding neck was comprehensively analyzed. First, the influence of the nozzle and basement temperatures on the printing performance and bonding neck size was measured. Second, CT scanning was used to realize the quantitative characterization of bonding neck parameters, and the reason behind the deviation of actual measurements from theoretical calculations was analyzed. When the nozzle temperature increased from 180 to 220 °C, CT measurement showed that the bonding neck diameter increased from 0.29 to 0.34 mm, and the cross-sectional porosity reduced from 5.48% to 3.22%. Finally, the fracture mechanism was studied, and the influence of the interfacial bonding quality on the destruction process of the materials was determined. In conclusion, this study can assist in optimizing the process parameters, which improves the precision of the printing parts and performance between the layers.

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Mechanical behaviour of 3D printed composite parts with short carbon fiber reinforcements

Cited by 97 publications

References 39 publications

Impact of processing conditions and sizing on the thermomechanical and morphological properties of polypropylene/carbon fiber composites fabricated by material extrusion additive manufacturing

Impact of processing conditions and sizing on the thermomechanical and morphological properties of polypropylene/carbon fiber composites fabricated by material extrusion additive manufacturing

Parameters Affecting the Mechanical Properties of Three-Dimensional (3D) Printed Carbon Fiber-Reinforced Polylactide Composites

Interfacial Bonding Mechanism and Mechanical Performance of Continuous Fiber Reinforced Composites in Additive Manufacturing

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