Additive manufacturing of high-performance carbon-composites: An integrated multi-axis pressure and temperature monitoring sensor

Kim, Hang-Gyeom; Hajra, Sugato; Oh, Dongik; Kim, Namjung; Kim, Hoe Joon

doi:10.1016/j.compositesb.2021.109079

Cited by 29 publications

(36 citation statements)

References 39 publications

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“…The FFF printing technique is an efficient method to print any composite-based physical sensors due to various advantages. This technology allows the fabrication of even slight indentation on the final printed parts by employing support from lower layers [39].…”

Section: D Printing Of Modified Cnt Nanocompositesmentioning

confidence: 99%

“…MWCNTs/PLA filaments were obtained by first dispersing commercial MWCNTs' powders in dichloromethane (DCM) using a probetype ultrasonicator at 24.86 kHz and180 W for 5 min. Then, 50 g of dried PLA pellets were dissolved in 500 mL of the MWCNTs/DCM suspension by agitation at 600 rpm at room temperature for 8 h. The evaporation of DCM solvent occurred at 100 • C for 12 h. Finally, the dried MWCNTs/PLA composite was shredded and then extruded through a single screw extruder at 180 • C and 45 cm/min speed to fabricate the MWCNTs/PLA filament (Figure 8) [39].…”

Section: D Printing Of Modified Cnt Nanocompositesmentioning

confidence: 99%

“…Finally, to determine mechanical properties, the filament (before printing) was cut with a length of Polymers 2021, 13, 4007 8 of 17 70 mm. Then, the 3D specimen was printed out for the tensile test based on the ASTM D638 Type V specimen (Length: 9.53 mm, Width: 3.18 mm, and thickness: 3.2 mm) [39].…”

Section: D Printing Of Modified Cnt Nanocompositesmentioning

confidence: 99%

“…where: l is the length between the coated conductive epoxy and D is the filament diameter; H is height, and A is the area of coated conductive epoxy of the 3D printed sample [39]. Concerning the composite filament, the electrical conductivity enhanced dramatically to 0.5 wt% of filler contents.…”

Section: D Printing Of Modified Cnt Nanocompositesmentioning

confidence: 99%

“…where: l is the length between the coated conductive epoxy and D is the filament diameter; H is height, and A is the area of coated conductive epoxy of the 3D printed sample [39].…”

Section: D Printing Of Modified Cnt Nanocompositesmentioning

confidence: 99%

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Fabrication of High-Performance CNT Reinforced Polymer Composite for Additive Manufacturing by Phase Inversion Technique

Parnian

D’Amore

2021

Polymers

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Additive Manufacturing (AM) of polymer composites has enabled the fabrication of highly customized parts with notably mechanical properties, thermal and electrical conductivity compared to un-reinforced polymers. Employing the reinforcements was a key factor in improving the properties of polymers after being 3D printed. However, almost all the existing 3D printing methods could make the most of disparate fiber reinforcement techniques, the fused filament fabrication (FFF) method is reviewed in this study to better understand its flexibility to employ for the proposed novel method. Carbon nanotubes (CNTs) as a desirable reinforcement have a great potential to improve the mechanical, thermal, and electrical properties of 3D printed polymers. Several functionalization approaches for the preparation of CNT reinforced composites are discussed in this study. However, due to the non-uniform distribution and direction of reinforcements, the properties of the resulted specimen do not change as theoretically expected. Based on the phase inversion method, this paper proposes a novel technique to produce CNT-reinforced filaments to simultaneously increase the mechanical, thermal, and electrical properties. A homogeneous CNT dispersion in a dilute polymer solution is first obtained by sonication techniques. Then, the CNT/polymer filaments with the desired CNT content can be obtained by extracting the polymer’s solvent. Furthermore, optimizing the filament draw ratio can result in a reasonable CNT orientation along the filament stretching direction.

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Section: D Printing Of Modified Cnt Nanocompositesmentioning

confidence: 99%

Section: D Printing Of Modified Cnt Nanocompositesmentioning

confidence: 99%

Section: D Printing Of Modified Cnt Nanocompositesmentioning

confidence: 99%

Section: D Printing Of Modified Cnt Nanocompositesmentioning

confidence: 99%

“…where: l is the length between the coated conductive epoxy and D is the filament diameter; H is height, and A is the area of coated conductive epoxy of the 3D printed sample [39].…”

Section: D Printing Of Modified Cnt Nanocompositesmentioning

confidence: 99%

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Fabrication of High-Performance CNT Reinforced Polymer Composite for Additive Manufacturing by Phase Inversion Technique

Parnian

D’Amore

2021

Polymers

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Additively Manufactured Mechanical Metamaterial‐Based Pressure Sensor with Tunable Sensing Properties for Stance and Motion Analysis

et al. 2023

Self Cite

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Mechanical metamaterials are attracting considerable attention due to their unique properties not found in natural materials. Advanced geometrical shapes such as Menger cubes, origami templates, and gyroids offer exciting avenues for device engineering. In addition, the recent developments of various additive manufacturing technologies have expanded materials selection and geometrical complexities. Herein, a piezoresistive pressure sensor based on a 3D‐printed gyroid structure with a conformal coating of carbon nanotubes (CNTs) is presented. The gyroid structures are printed using fused deposition modeling (FDM) 3D printing with thermoplastic polyurethane (TPU), providing mechanical robustness even at low densities. By altering the relative density of the gyroid structure, Young's modulus can be tailored, ranging from 0.32 MPa at 30% relative density and 3.61 MPa at 80% relative density. The presented gyroid‐based pressure sensor achieves a wide sensing range of up to 1.45 MPa and a high sensitivity of 2.68 MPa−1. The sensor is integrated into a shoe for wearable applications, demonstrating its mechanical robustness and potential for human stance and motion monitoring.

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Additive Manufacturing of Flexible Strain Sensors Based on Smart Composites for Structural Health Monitoring with High Accuracy and Fidelity

Ahmed,

Bodaghi,

Nauman

et al. 2023

Adv Eng Mater

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This research introduces novel flexible spherical carbon nanoparticle‐based polyurethane conductive ink, which is employed to 3D print strain sensors by a lab‐developed Direct Ink Writing system. Rheological tests are performed, and sensors are pasted on Glass‐Fiber‐Reinforced Plastic specimens to study strain gauge behaviors under quasi‐static loading. The gauge factor in tensile loading is found to be layer width dependent as decreasing the strain gauge’s layer width increases the sensitivity of the strain sensor. A maximum gauge factor of 34 is achieved using a layer width of 0.2mm, 17 times greater than commercially available metal foil strain gauges. The four‐point bend tests are performed under tension/compression to assess the sensor’s strain‐sensing and damage‐monitoring ability. Fractographic analysis is coupled with strain monitoring using the developed sensor, which confirms that the failure progresses from intralaminar failure modes such as ply splitting in tension. At the same time, delamination leads to kink band formation under compression and the eventual failure of load‐bearing fibers. The developed sensor exhibits repeatable performance with low hysteresis and integrated non‐linearity errors for up to 1000 cycles. The developed sensors could be effectively employed for online in‐situ structural health monitoring of structures in different applications under static and dynamic loading.This article is protected by copyright. All rights reserved.

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Additive manufacturing of high-performance carbon-composites: An integrated multi-axis pressure and temperature monitoring sensor

Cited by 29 publications

References 39 publications

Fabrication of High-Performance CNT Reinforced Polymer Composite for Additive Manufacturing by Phase Inversion Technique

Fabrication of High-Performance CNT Reinforced Polymer Composite for Additive Manufacturing by Phase Inversion Technique

Additively Manufactured Mechanical Metamaterial‐Based Pressure Sensor with Tunable Sensing Properties for Stance and Motion Analysis

Additive Manufacturing of Flexible Strain Sensors Based on Smart Composites for Structural Health Monitoring with High Accuracy and Fidelity

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