Rheological investigation of nylon‐carbon fiber composites fabricated using material extrusion‐based additive manufacturing

2021 ◽  
Author(s):  
Arit Das ◽  
Martin Etemadi ◽  
Bradley A. Davis ◽  
Steven H. McKnight ◽  
Christopher B. Williams ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Carbon Fiber ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
Material Extrusion

scholarly journals Адитивне формування вуглекомпозитів на основі L-полілактиду

2020 ◽  
Vol 140 (6) ◽  
pp. 104-111
Author(s):  
Р. Ш. Іскандаров ◽  
Н. В. Сова ◽  
Б. М. Савченко ◽  
І. І. П'ятничук ◽  
В. А. Татаренко
Keyword(s):  
Tensile Strength ◽  
Additive Manufacturing ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Polymer Matrix ◽  
Fiber Composites ◽  
Carbon Composite ◽  
Test Method ◽  
Carbon Fiber Composites ◽  
Injection Molded

Study of the FFF additive manufacturing process of composite material based on L – polylactide (PLLA) with ultra-short carbon fibers. Tensile strength and elongation at break for all test specimens were determined according to ISO 527. Tensile modulus - ASTM D638-10, specimen density - PN-EN ISO 1183, microscopic examination - according to ASTM E2015 - 04 (2014). Charpy Shock Tests ISO 179 and ASTM D256. Bending test method ISO 178 and ASTM D 790. The rational modes of FFF additive manufacturing (AM) of carbon fiber composite based on PLLA was established. Properties of carbon fiber PLLA and unfilled PLLA was determinated for AM formed samples and injection molded samples. Carbon fiber composites have significantly higher flexural and tensile module us values compared to the original L-polylactide, which is due to the effect of polymer matrix reinforcement by the fibrous component. However, finished products obtained by AM PLLA carbon composite have a lower impact strength and tensile strength, which is likely to be due to the fact that the carbon fibers are short (50-60 mkm) and have a cavitations effect during injection molding and AM. Density of carbon fiber filled PLLLA was lower the theoretically calculated value for filament material as well for injection molded and AM formed samples. Density reduction probably the main cause of impact properties deterioration due to cavity forming around carbon fibers. Density and tensile properties of AM formed samples can be changed by AM slicing parameter – extrusion multiplier. Cavitation effect for carbon fiber composites observed for PLLA composite in form AM filament, injection molded parts and AM formed samples. Cavity forming was confirmed by optical microscopy and density measurement. Possible reason for cavity forming is orientation deformation of the fiber in polymer matrix during the formation of the filament. The effect of cavitation also persists in the AM of products from carbon composites due to the passage of the orientation at the exit of the printer nozzle.  The possibility of regulating the density and physical and mechanical properties of carbon composite products obtained by the additive manufacturing method has been established. Selection of rational values of the extrusion multiplier and the direction of the layers in the additive molding allows you to create products with the desired complex of properties.

scholarly journals Anisotropic Properties of Polylactic acid–carbon Fiber Composites Prepared by Droplet spray Additive Manufacturing

Materials ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 669 ◽  
Author(s):  
Yongfeng Li ◽  
Qingjun Ding ◽  
Hongyuan Zhao ◽  
Tingting Wu ◽  
Mingming Zhang ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Carbon Fiber ◽  
Polylactic Acid ◽  
Rapid Development ◽  
Functional Materials ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
Universal Method ◽  
The Impact ◽  
Droplet Spray

Anisotropic materials are important functional materials in many fields. The use of these materials is currently being expanded through the rapid development of additive manufacturing. However, there is still no universal method for fabricating two-dimensional anisotropic polymer composites. Here, polylactic acid–carbon fiber composites were prepared using the droplet spray method, and their mechanical and friction properties were studied. The tensile strength in the X–Y plane perpendicular to the direction of the droplet spray was significantly higher than that in the direction of droplet ejection. Similar trends were observed for the elongation at breaking and the impact strength. The friction coefficient was smallest in the X–Y plane. Scanning electron microscopy showed that carbon fibers were oriented in the X–Y plane, which enhanced the mechanical and friction properties in this plane.

scholarly journals Tensile properties and failure behavior of chopped and continuous carbon fiber composites produced by additive manufacturing

2019 ◽  
Vol 26 ◽  
pp. 227-241 ◽  
Author(s):  
Juan Naranjo-Lozada ◽  
Horacio Ahuett-Garza ◽  
Pedro Orta-Castañón ◽  
Wilco M.H. Verbeeten ◽  
Daniel Sáiz-González
Keyword(s):  
Additive Manufacturing ◽  
Carbon Fiber ◽  
Tensile Properties ◽  
Fiber Composites ◽  
Failure Behavior ◽  
Carbon Fiber Composites ◽  
Continuous Carbon Fiber

Rheology, crystal structure, and nanomechanical properties in large-scale additive manufacturing of polyphenylene sulfide/carbon fiber composites

2018 ◽  
Vol 168 ◽  
pp. 263-271 ◽  
Author(s):  
Peng Liu ◽  
Ralph B. Dinwiddie ◽  
Jong K. Keum ◽  
Rama K. Vasudevan ◽  
Stephen Jesse ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Additive Manufacturing ◽  
Carbon Fiber ◽  
Large Scale ◽  
Fiber Composites ◽  
Polyphenylene Sulfide ◽  
Carbon Fiber Composites ◽  
Nanomechanical Properties

scholarly journals Experimental Investigation of Additive Manufacturing of Continuous Carbon Fiber Composites with Multifunctional Electro-Tensile Properties

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6574
Author(s):  
Ritesh Ghimire ◽  
Frank Liou
Keyword(s):  
Tensile Strength ◽  
Additive Manufacturing ◽  
Electrical Properties ◽  
Carbon Fiber ◽  
Ultimate Tensile Strength ◽  
Tensile Properties ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
Continuous Carbon Fiber ◽  
Multifunctional Properties

Manufacturing processes for monofunctional and multifunctional materials vary depending on the design optimization. Multifunctional continuous carbon fiber composites provide great potential in achieving coupled structural and electrical properties for their applications in aircraft, unmanned aircraft systems, and spacecraft. Proper optimization of tensile and electrical properties offers benefits early in the design and continuous operational safety phases to obtain coupled multifunctional properties. In this paper, fused filament fabrication additive manufacturing (AM) technique was used to fabricate continuous carbon fiber solid laminated composites test coupons. The proposed new method characterizes the electrical conductivity’s coupled effects on the tensile properties, including the failure loads and modes. This paper addresses a novel way of integrating electrical function into the composites that significantly reduce weight, potentially replacing the bulky electrical wires. Tensile and electrical conductivity tests were concurrently conducted on coupons, and the results were plotted and tabulated. The results showed the multifunctional properties of the maximum ultimate tensile strength of 392 MPa with the maximum tensile load of 8907 N, and resistance of 37.5 G·Ω. The average values for ultimate tensile strength and maximum load were 371 MPa and 8459 N, respectively.

On the Influence of Moisture on Dielectric Properties of Polyetheretherketone (PEEK) Carbon-Fiber Composites

2000 ◽  
Author(s):  
Bruce K. Fink ◽  
Roy L. McCullough ◽  
John W. Gillespie ◽  
Jr.
Keyword(s):  
Dielectric Properties ◽  
Carbon Fiber ◽  
Fiber Composites ◽  
Carbon Fiber Composites

The Durability Characterization of High Temperature Polymer Matrix - Carbon Fiber Composites for Future Air Force Applications

2001 ◽  
Author(s):  
Roger J. Morgan ◽  
Jim Caruthers ◽  
Lawrence T. Drzal ◽  
Chuk Leung ◽  
Eugene Shin
Keyword(s):  
High Temperature ◽  
Carbon Fiber ◽  
Air Force ◽  
Polymer Matrix ◽  
Fiber Composites ◽  
Carbon Fiber Composites
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