Large-scale deformation and damage detection of 3D printed continuous carbon fiber reinforced polymer-matrix composite structures

2019 ◽  
Vol 212 ◽  
pp. 552-560 ◽  
Author(s):  
Congcong Luan ◽  
Xinhua Yao ◽  
Chuck Zhang ◽  
Ben Wang ◽  
Jianzhong Fu
Keyword(s):  
Carbon Fiber ◽  
Damage Detection ◽  
Composite Structures ◽  
Large Scale ◽  
Polymer Matrix Composite ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Reinforced Polymer ◽  
Continuous Carbon Fiber ◽  
3D Printed

Mechanical Finishing of 3D Printed Continuous Carbon Fiber Reinforced Polymer Composites via CNC Machining

2019 ◽  
Author(s):  
Pedram Parandoush ◽  
Timothy Deines ◽  
Dong Lin ◽  
Hao Zhang ◽  
Chang Ye
Keyword(s):  
Surface Roughness ◽  
Carbon Fiber ◽  
3D Printing ◽  
Surface Morphology ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Reinforced Polymer ◽  
Finishing Process ◽  
Continuous Carbon Fiber ◽  
3D Printed

Abstract 3D printing technology could be extremely beneficial for increasing the flexibly and reducing the cost of carbon fiber reinforced polymer composite (CFRP) production. However, this technology suffers from poor surface quality and uncertain engineering quality. Mechanical finishing processes could concurrently solve these surface issues with the 3D printed composites components. Herein, a mechanical finishing process for 3D printed CFRP composites via CNC milling is proposed to improve the surface quality of two 3D printing methods, namely fused deposition modeling (FDM) and laser assisted-laminated object manufacturing (LA-LOM). The 3D printed CFRP structures fabricated via both methods comprise of continuous carbon fiber reinforcement. The surface roughness and surface morphology of the original unfinished and finished surfaces with various cutting depths are extensively studied to investigate the feasibility of the proposed finishing technique. The surface morphology of the surfaces parallel and perpendicular to the 3D printed layers is the main focus of this work. After the CNC finishing process, the surface roughness of the 3D printed CFRP composites is improved by 70% and 60% for FDM and LA-LOM components, respectively. A smooth, consistent, and predictable surface morphology is achieved for various cutting depths demonstrating a substantial improvement over the original 3D printed surfaces.

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.

Enhanced damping characteristics of carbon fiber reinforced polymer–based shear thickening fluid hybrid composite structures

2020 ◽  
Vol 31 (20) ◽  
pp. 2291-2303
Author(s):  
Jaehyeong Lim ◽  
Sang-Woo Kim
Keyword(s):  
Carbon Fiber ◽  
Hybrid Composite ◽  
Composite Structures ◽  
Shear Thickening ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Shear Thickening Fluid ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

Lightweight carbon fiber reinforced polymer composite structures with high stiffness are at risk of resonant vibration. Our study proposes a methodology to reduce this risk by passively improving the damping ratio of carbon fiber reinforced polymer composite structures. We developed shear thickening fluid hybrid composite structures by applying polyimide tubes filled with shear thickening fluid having rheological properties into a composite laminate. In order to verify the proposed methodology, carbon fiber reinforced polymer–based shear thickening fluid hybrid composite beams were fabricated, and modal tests were subsequently performed to investigate their dynamic characteristics. The results revealed that the damping ratios for the initial six vibration modes of the carbon fiber reinforced polymer–based shear thickening fluid hybrid composite beam increased by 38%–174%; however, their Young’s modulus and tensile strength, respectively, decreased by 11.25% and 14.08% when compared to those of normal carbon fiber reinforced polymer composite beams. We believe that the proposed methodology to improve the damping ratio will contribute in reducing the risk of vibration resonance of carbon fiber reinforced polymer composite structures in various applications.

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