High Speed Processing of Low-Melt Polyaryletherketone Prepreg Using in-Situ Consolidation Automated Fiber Placement

Chadwick, Ashley; Schiel, Ines; Nowotny, Sebastian; Raps, Lukas

doi:10.33599/nasampe/s.23.0036

Cited by 2 publications

(4 citation statements)

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“…TC1225 by Toray Advanced Composites was used in previous publications and Part 1 of this work. [5][6][7] For this material, Seneviratne et al found a short beam strength of 42 % (33.5 MPa) of press-consolidated reference, low crystallinity values at 4.1 to 5.1 % and high porosity of 3.9 % to 5.8 %. Signifigant strength knockdown factors compared to press-consolidated reference were found in Part 1 of this work for unheated tooling, as well.…”

Section: Important Work In the Field: Press Versus In-situmentioning

confidence: 81%

“…This novel material promises similar mechanical properties as PEEK-based composites combined with lower melt-temperature (307°C, PEEK: 343°C) and lower melt viscosity, facilitating AFP processing and enabling higher layup rates. 4,5 CF/LM-PAEK prepreg tape is available from different manufacturers and with varying compositions. TC1225 by Toray Advanced Composites was used in previous publications and Part 1 of this work.…”

Section: Important Work In the Field: Press Versus In-situmentioning

confidence: 99%

“…6,7 The results were extended in an investigation of layup speed sensitivity of TC1225 and a second CF/LM-PAEK material with 55 % fiber volume fraction. 5 Part 1 of this work investigated in-situ consolidation of 60 % fiber volume fraction (FVF) prepreg tape material, optimized for established production technologies (autoclave and hot press). Heated tooling and post process tempering were investigated with regards to their impact on mechanical and thermal properties.…”

Section: Intimate Contactmentioning

confidence: 99%

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Characteristics of in-situ automated fiber placement carbon-fiber-reinforced low-melt polyaryl ether ketone laminates part 2: Effect of prepreg composition

Raps,

Chadwick,

Mössinger

et al. 2024

Journal of Composite Materials

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This paper presents an investigation into prepreg tape composition and its impact on the consolidation quality of in‐situ Automated Fiber Placement-manufactured laminates. Three different prepreg tape materials were investigated in terms of fiber distribution, porosity and surface roughness. Laminates were manufactured using the in-situ Automated Fiber Placement process and subsequently tested using microanalysis and mechanical testing methods. Higher quality prepreg tape material yielded lower porosity laminates and increased mechanical strength results. The best in-situ Automated Fiber Placement-manufactured laminates achieved 82 % and 88 % of hot-pressed reference tensile- and compressive strength, respectively. Prepreg tape with disadvantageous composition for in‐situ consolidation yielded up to 74 % knockdown compared to the best in-situ consolidated laminates. A five-point bending test was successfully used to determine interlaminar shear strength with significant results relating to consolidation quality. A correlation was successfully established between prepreg composition, resulting laminate consolidation quality and mechanical properties.

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Section: Important Work In the Field: Press Versus In-situmentioning

confidence: 81%

Section: Important Work In the Field: Press Versus In-situmentioning

confidence: 99%

Section: Intimate Contactmentioning

confidence: 99%

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Characteristics of in-situ automated fiber placement carbon-fiber-reinforced low-melt polyaryl ether ketone laminates part 2: Effect of prepreg composition

Raps,

Chadwick,

Mössinger

et al. 2024

Journal of Composite Materials

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“…Secondly, the median tensile strength of both UD (Figure 14(b)) and QI (Figure 14(d)) laminates are similarly low for the configurations of cold tooling , tempered and heated tooling (σT22 = 23 - 25 MPa, σtu = 696 - 725 MPa). The values of the cold tooling and heated tooling configuration have already been presented in previous works of the authors 32 and, 33 respectively. All mechanical values were highest with the post process step of hot pressing ( τ = 88 MPa, σcu = 486 MPa, σT22 = 52* MPa, σtu = 1040 MPa).…”

Section: Resultsmentioning

confidence: 99%

Characteristics of in-situ automated fiber placement carbon-fiber-reinforced low-melt polyaryl ether ketone laminates part 1: Manufacturing influences

Mössinger,

Raps,

Fricke

et al. 2024

Journal of Composite Materials

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This study presents an investigation into mechanical and thermal properties, as well as the microstructure of Automated Fiber Placement-manufactured laminates using a novel carbon fiber-reinforced low-melt polyaryl ether ketone polymer material. The material’s lower melting temperature and lower melt viscosity as compared to established high-temperature thermoplastic materials as PEEK, promises favourable characteristics for the Automated Fiber Placement process. This work aims at in-situ consolidation and the influence of a heated tooling and a post process tempering step, which both turned out to be promising in previous investigations. Laminates were manufactured using a cold tooling, a heated tooling configuration, a cold tooling with a subsequent tempering process step and a hot-pressed reference laminate. Differential Scanning Calorimetry showed that crystallinity values more than doubled for the heated tooling and post process tempering configurations, compared to the cold tooling, reaching 24% and 30%, respectively. Mechanical strength values showed an increase in interlaminar shear strength and compression strength but did not increase to the same extent as was expected from the increase in crystallinity. With Scanning Electron Microscopy differences in the microscopic structure of the polymer matrix could be detected. While the post process tempering step leads to a mostly lamellar crystalline structure, the heated tooling configuration and the post process hot pressing induce a predominance of crystalline spherulites, which might positively affect the mechanical performance. Computed Tomography scans revealed a high amount of porosity in the in-situ-manufactured samples and unprocessed tape material, which likely mitigated the positive effect of increased crystallinity.

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High Speed Processing of Low-Melt Polyaryletherketone Prepreg Using in-Situ Consolidation Automated Fiber Placement

Cited by 2 publications

References 0 publications

Characteristics of in-situ automated fiber placement carbon-fiber-reinforced low-melt polyaryl ether ketone laminates part 2: Effect of prepreg composition

Characteristics of in-situ automated fiber placement carbon-fiber-reinforced low-melt polyaryl ether ketone laminates part 2: Effect of prepreg composition

Characteristics of in-situ automated fiber placement carbon-fiber-reinforced low-melt polyaryl ether ketone laminates part 1: Manufacturing influences

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