Manufacturing and characterization of continuous fiber-reinforced thermoplastic tape overmolded long fiber thermoplastic

Alwekar, Shailesh; Ogle, Ryan Christian; Kim, Seokpum; Vaidya, Uday

doi:10.1016/j.compositesb.2020.108597

Cited by 25 publications

(9 citation statements)

References 17 publications

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“…This trend is caused by the physical combination between fibers and the polymer melt, indicating that the presence of TPU constrains the displacement of carbon fiber tows during the tensile process, enhancing the strain and improving energy absorption. [25][26][27][28] Furthermore, the control group (without the TPU sheath) exhibits one-time breakage followed by brittleness breakage. The TPU sheath ensures the experimental groups undergoing two-stage fractures, which are separately attributed to the carbon fiber tows that provide mechanical support and the TPU sheath that offers ductility.…”

Section: Resultsmentioning

confidence: 99%

Combination and development of carbon filament tows: Application of coextrusion with long fiber‐reinforced thermoplastics

Lin

Bao

2021

Polymer Composites

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In this study, long fiber-reinforced thermoplastics (LFT) and coextrusion are applied to wrap carbon fiber tows in a thermoplastic polyurethane (TPU) outer layer. In this way, the proposed wrapped yarns have a sheath-core structure.Scanning electron microscopy observation reveals that TPU and carbon fiber tows form a physical combination that allows TPU to further enhance the tensile strength of carbon fiber tows by 35.87%, which is 19.62 ± 1.88 MPa. The tensile strain of carbon fiber tows also improves. LFT and coextrusion are performed to produce successive carbon fiber tows that can be successfully fabricated into textiles, possessing good fabric flexibility. The technique of carbon fiber tows can be applied to mass production feasibility for the field of carbon fiber composites.

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Section: Resultsmentioning

confidence: 99%

Combination and development of carbon filament tows: Application of coextrusion with long fiber‐reinforced thermoplastics

Lin

Bao

2021

Polymer Composites

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“…Because of the pores in the interface, the composites consume the strength of matrices completely when being bent. 29 With the weaving process, the properties of both matrices and voids among materials make the composite flexible while protecting the carbon fibers from friction.…”

Section: Resultsmentioning

confidence: 99%

Extrusion/hot pressing processing and laminated layers of continuous carbon fiber/thermoplastic polyurethane knitted composites

Lin

Bao

2021

Polymer International

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Extrusion is employed to combine carbon fiber tows and thermoplastic polyurethane (TPU) blend. TPU-cladded carbon fibers undergo knitting to form carbon fiber knitted composites. Microscopic observation proves that the compound carbon fibers are composed of a double-layered structure with interfacial bonding and fiber axial alignment. In addition, the TPU coating can reduce friction during knitting, which provides the carbon fiber knitted composites with flexibility and resilience. Regarding the mechanical properties, the tensile strength is in direct proportion to the number of lamination layers. In particular, sixlayered knitted composites exhibit an optimal tensile strength of 43.72 MPa, whereas four-layered knitted composites exhibit optimal tensile elongation. Through the manufacturing and evaluations in this study, continuous carbon fibers can be fabricated via extrusion, thereby obtaining a knitted structure that can be laminated to strengthen the mechanical properties and electromagnetic interference shielding efficacy of the laminated composites. Large composites can also be achieved, which overcomes the limits of continuous carbon fibers in subsequent production.

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“…Due to its definition and multiple dependencies, this quantity is prone to be predicted by the coupling of finite element simulations and neural networks, which will be a main focus in upcoming research activities. However, the gathered knowledge regarding process parameters (consolidation pressure, temperature, and time) on the interface properties of substrate/tape structures can be used in automotive or aerospace applications to further optimize current design or to increase the strength to weight ratio even more [ 4 , 24 , 25 , 26 ].…”

Section: Conclusion and Future Perspectivesmentioning

confidence: 99%

Interface Characterization of Consolidated PPGF Tapes on PPGF Mat Material

Kapshammer¹,

Miron²,

Dangl³

et al. 2023

Polymers

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Laminated composites with thermoset matrices are already well established in major engineering fields like automotive and aviation. The primary drawbacks of such thermoset-based composites are the high cycle times required during manufacturing and their limited potential for recycling. Providing an alternative to thermoset-based composites, thermoplastic matrix materials gained more and more momentum by addressing these previously mentioned drawbacks. The preferred manufacturing technique for these materials employs fiber-reinforced thermoplastic tapes consolidated and formed together with a compatible substrate. The most critical aspect for all these applications is the stress or load transfer between the thermoplastic tapes and the substrate. If the interface is too weak and fails prior to the substrate or tape, a high amount of theoretical mechanical performance is lost. The presented research investigates the influence of variations in manufacturing parameters, within the industrially relevant process window, on the interface strength of the final composite. The investigated composite material consists of PPGF UD tapes consolidated on a PPGF mat substrate. In particular, the influence of the consolidation parameters of pressure, temperature, and time are of special interest. The results of this work reveal a 400% increase in the measured mean strain energy release rate upon increasing the consolidation time from 60 s to 120 s at a consolidation temperature of 230 °C and a pressure of one bar. In contrast to this, an increase in the consolidation pressure, at constant temperature and time, leads to a minor improvement in the GC value of 20%. For testing and characterizing the corresponding interface properties, a mandrel peel testing setup was employed.

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Manufacturing and characterization of continuous fiber-reinforced thermoplastic tape overmolded long fiber thermoplastic

Cited by 25 publications

References 17 publications

Combination and development of carbon filament tows: Application of coextrusion with long fiber‐reinforced thermoplastics

Combination and development of carbon filament tows: Application of coextrusion with long fiber‐reinforced thermoplastics

Extrusion/hot pressing processing and laminated layers of continuous carbon fiber/thermoplastic polyurethane knitted composites

Interface Characterization of Consolidated PPGF Tapes on PPGF Mat Material

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