scholarly journals The influence of dynamic rheological properties on carbon fiber-reinforced polyetherimide for large-scale extrusion-based additive manufacturing

2018 ◽  
Vol 99 (1-4) ◽  
pp. 411-418 ◽  
Author(s):  
Christine Ajinjeru ◽  
Vidya Kishore ◽  
John Lindahl ◽  
Zeke Sudbury ◽  
Ahmed Arabi Hassen ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Carbon Fiber ◽  
Rheological Properties ◽  
Large Scale ◽  
Fiber Reinforced ◽  
Dynamic Rheological Properties ◽  
Carbon Fiber Reinforced

Feasibility and Characterization of Large-Scale Additive Manufacturing With Long Fiber Reinforced Composites

2020 ◽  
Author(s):  
Aditya R. Thakur ◽  
Ming C. Leu ◽  
Xiangyang Dong
Keyword(s):  
Additive Manufacturing ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Large Scale ◽  
Flexural Modulus ◽  
High Deposition Rate ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Continuous Fiber ◽  
Long Carbon Fibers

Abstract A new additive manufacturing (AM) approach to fabricate long fiber reinforced composites (LFRC) was proposed in this study. A high deposition rate was achieved by the implementation of a single-screw extruder, which directly used thermoplastic pellets and continuous fiber tows as feedstock materials. Thus, the proposed method was also used as a large-scale additive manufacturing (LSAM) method for printing large-volume components. Using polylactic acid (PLA) pellets and continuous carbon fiber tows, the feasibility of the proposed AM method was investigated through printing LFRC samples and further demonstrated by fabricating large-volume components with complex geometries. The printed LFRC samples were compared with pure thermoplastic and continuous fiber reinforced composite (CFRC) counterparts via mechanical tests and microstructural analyses. With comparable flexural modulus, the flexural strength of the LFRC samples was slightly lower than that of the CFRC samples. An average improvement of 28% in flexural strength and 50% in flexural modulus were achieved compared to those of pure PLA parts, respectively. Discontinuous long carbon fibers, with an average fiber length of 20.1 mm, were successfully incorporated into the printed LFRC samples. The carbon fiber orientation, distribution of carbon fiber length, and dispersion of carbon fiber as well as porosity were further studied. The carbon fibers were highly oriented along the printing direction with a relatively uniformly distributed fiber reinforcement across the LFRC cross section. With high deposition rate (up to 0.8 kg/hr) and low material costs (< $10/kg), this study demonstrated the potentials of the proposed printing method in LSAM of high strength polymer composites reinforced with long carbon fibers.

scholarly journals Surface Figuring of Large Carbon Fiber Reinforced Polymer Antenna Reflector with A Dual-robots Fabrication System

2019 ◽  
Vol 215 ◽  
pp. 05005
Author(s):  
Qiang Xin ◽  
Haitao Liu ◽  
Jieli Wu ◽  
Lin Tang ◽  
Dailu Wang ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Large Scale ◽  
Chemical Properties ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Large Space ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced ◽  
Antenna Reflector

Carbon Fiber Reinforced Polymer (CFRP) has excellent physical and chemical properties which make it a promising material in making large space borne components, especially in making antenna reflectors and ultra-lightweight space mirrors. These components are usually in large scale to achieve the application requirements. In this research, a dual-robots fabrication system was in-house developed to meet the requirement for figuring a large off-axis parabolic CFRP antenna reflector with the size of 2.4m×4.58m. To make sure that whole surface of the antenna reflector could be covered by the fabrication system, the surface was divided into six regions to accomplish the fabrication. In addition, a special designed tool was utilized to adapt to the curvature variation of the surface. The final surface form accuracies obtained for areas ≤φ1750mm, ≤φ2400mm and the whole surface of the antenna reflector were 13.5μm RMS, 23.4μm RMS and 45.8μm RMS, respectively. Feasibility and surface figuring accuracy of the dual-robots system in fabricating large scale components were verified.

scholarly journals Additive manufacturing of two-phase lightweight, stiff and high damping carbon fiber reinforced polymer microlattices

2020 ◽  
Vol 32 ◽  
pp. 101106 ◽  
Author(s):  
Zhenpeng Xu ◽  
Chan Soo Ha ◽  
Ruthvik Kadam ◽  
John Lindahl ◽  
Seokpum Kim ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Carbon Fiber ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Two Phase ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

scholarly journals Additive manufacturing of short carbon fiber-reinforced polyamide composites by Fused Filament Fabrication: formulation, manufacturing and characterization

2021 ◽  
pp. 110358
Author(s):  
Yahya Abderrafai ◽  
Mohammad Hadi Mahdavi ◽  
Facundo Sosa-Rey ◽  
Chloé Hérard ◽  
Ivonne Otero Navas ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Carbon Fiber ◽  
Fiber Reinforced ◽  
Fused Filament Fabrication ◽  
Short Carbon Fiber ◽  
Carbon Fiber Reinforced ◽  
Short Carbon

Direct Write Additive Manufacturing of High-Strength, Short Fiber Reinforced Sandwich Panels

2020 ◽  
Author(s):  
Nashat Nawafleh ◽  
Emrah Celik
Keyword(s):  
Additive Manufacturing ◽  
Carbon Fiber ◽  
Mechanical Performance ◽  
Sandwich Panels ◽  
High Strength ◽  
Direct Write ◽  
Fiber Reinforced ◽  
Short Carbon Fiber ◽  
Carbon Fiber Reinforced ◽  
Short Carbon

Abstract Additive manufacturing (AM) is a novel technology which allows fabrication of complex geometries from digital representations without tooling. In addition, this technology results in low material waste, short lead times and cost reduction especially for the production of parts in low quantities. Current additive manufacturing processes developed for thermoplastic sandwich panels suffer from an unavoidable weak mechanical performance and low thermal resistance. To overcome these limitations, emphasis is paid in this study on direct write AM technology for the fabrication of short carbon fiber-reinforced sandwich panel composites. Sandwich panels using different infill densities with high strength (> 107 MPa), and high short carbon fiber volume (46%) were attained successfully. In parallel to the strength enhancement, these sandwich panels possessed reduced densities (0.72 g/cc3) due to their lightweight lattice core structures. The mechanical performance of the created sandwich panels was examined and compared to the unreinforced, base ink structures by performing compression tests. Successful fabrication and characterization of the additively manufactured thermoset-based carbon fiber reinforced, sandwich panels in this study can extend the range of applications for AM composites that require lightweight structures, high mechanical performance as well as the desired component complexity.

Sign in / Sign up

Export Citation Format

Share Document