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 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.

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

Effects of Hybridization on the Impact Performance of Flax-carbon Fiber Composites

2017 ◽  
Author(s):  
MOHAMMAD RAVANDI ◽  
UMEYR KUREEMUN ◽  
MIHAELA BANU ◽  
WERN SZE TEO ◽  
HEOW PUEH LEE
Keyword(s):  
Carbon Fiber ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
Impact Performance ◽  
The Impact

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

Polylactic acid/carbon fiber composites: Effects of polylactic acid-g-maleic anhydride on mechanical properties, thermal behavior, surface compatibility, and electrical characteristics

2017 ◽  
Vol 52 (3) ◽  
pp. 405-416 ◽  
Author(s):  
Yi-Jun Pan ◽  
Zheng-Ian Lin ◽  
Ching-Wen Lou ◽  
Chien-Lin Huang ◽  
Mong-Chuan Lee ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Maleic Anhydride ◽  
Polylactic Acid ◽  
Electromagnetic Interference ◽  
Reactive Extrusion ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
Shielding Effectiveness ◽  
Interfacial Compatibility

This study uses a reactive extrusion for the grafting of maleic anhydride on polylactic acid in order to form polylactic acid grafted maleic anhydride that serves as a compatibilizer between polylactic acid and carbon fiber. The effects of different ratios of the free radical initiator to maleic anhydride as well as the amounts of polylactic acid grafted maleic anhydride on the mechanical properties, interfacial compatibility, thermal behaviors, and electrical properties of the polylactic acid/carbon fiber composites are discussed. The test results indicate that using polylactic acid grafted maleic anhydride as compatibilizer improves the interfacial compatibility of polylactic acid/carbon fiber composites, which in turn contributes to a high electrical conductivity and the electromagnetic interference shielding effectiveness, while decreasing the surface resistance and increases. In addition, the amount of polylactic acid grafted maleic anhydride has a positive influence on their tensile properties, flexural strength, and impact strength. The differential scanning calorimetry results indicate that a high polylactic acid grafted maleic anhydride content is also conducive to crystallinity, but is not in related to the melting temperature. According to the scanning electronic microscope observation, the fractured composites that are inflicted by an impact have considerably few traces of the fibers being pulled out, which is ascribed to polylactic acid that can completely enwrap carbon fiber. Therefore, the incorporation of polylactic acid grafted maleic anhydride is proven to strengthen polylactic acid/carbon fiber composites, exemplified by their improved interfacial compatibility and properties.

The Impact Behavior of Glass and Carbon Fiber Composites

1984 ◽  
Vol 23 (2) ◽  
pp. 217-227 ◽  
Author(s):  
A. Golovoy ◽  
M. F. Cheung ◽  
H. Van Oene
Keyword(s):  
Carbon Fiber ◽  
Fiber Composites ◽  
Impact Behavior ◽  
Carbon Fiber Composites ◽  
The Impact
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