Sensitivity of Automated Fibre Placement Parameters on Manufacturing Defects in Laminated Composites

Bottene, Alex Camilli; Mello, Wellington Lombardo Nunes de; Almeida, Rynaldo Zanotele Hemerly de

doi:10.4273/ijvss.4.4.03

Cited by 2 publications

(3 citation statements)

References 2 publications

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“…However, the demands of quality, repeatability, and accuracy of laying restrict high‐level lay‐up speeds 29 . Based on the lay‐up speed values studied in the literature, the lay‐up speed limits are determined as 0.1 and 0.4 m/s for low and high lay‐up speeds, respectively 30 …”

Section: Experimental Methodsmentioning

confidence: 99%

“…29 Based on the lay-up speed values studied in the literature, the lay-up speed limits are determined as 0.1 and 0.4 m/s for low and high lay-up speeds, respectively. 30 CF/PEKK composite laminates were manufactured by Coriolis C1 (Coriolis Composites) laser-assisted AFP system with a KUKA QUANTEC KR210R3100 robot with different process parameters given in Table 2 with the dimensions of 40 Â 60 Â 3 ± 0.1 mm 3 by laying up 20-layer CF/PEKK tapes onto a heated stainless steel tool at 130 C. The tool surface was covered with a 50 μm thick polyimide film (Thermalimide RCBS, Airtech Advanced Materials, UK) to ensure the easy separation of laminate. To control the temperature during laying, seven thermocouples connected to the control unit were placed in the tool corners.…”

Section: Manufacturing Of Composite Laminates With Afpmentioning

confidence: 99%

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An experimental implication of long‐term hot‐wet‐aged carbon fiber/polyether ketone ketone composites: The impact of automated fiber placement process parameters and process‐induced defects

Şükür

Elmas

Eskizeybek

et al. 2023

J of Applied Polymer Sci

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During the service life of aerospace‐grade composites, process parameters and process‐induced defects may become crucial. Most studies in this field have mainly focused on the relationship between process‐induced defects and mechanical performance. However, the potential impact of process parameters and process‐induced defects on the service life of composites serving under severe service conditions has received little attention. In this work, the effects of hydrothermal conditioning on the mechanical performance of carbon fiber/polyether ketone ketone (CF/PEKK) composites are examined, along with the correlation between automated fiber placement (AFP) process parameters and process‐induced defects. For this, gap and overlap defects integrated CF/PEKK laminates were exposed to a long‐term (90 days) hot‐wet aging environment to simulate the actual service conditions. Defect‐induced composite samples reached saturation point at the end of 30 days with a mass gain of 0.2 wt%. The aging process resulted in an increase in the degree of crystallization by almost 14% without a change in the chemical structure, indicating the postcrystallization of the PEKK matrix. Even though the thermo‐mechanical performance diminished (~25%) with the aging process, storage modulus was slightly affected by process parameters and process‐induced defects. Considering the flexural and shear test results after the aging process, the impact of gap and overlap defects on the service life of AFP composites can be minimized with higher compaction forces (600 N) and lower lay‐up speeds (0.1 m/s).

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Manufacturing Of Composite Laminates With Afpmentioning

confidence: 99%

An experimental implication of long‐term hot‐wet‐aged carbon fiber/polyether ketone ketone composites: The impact of automated fiber placement process parameters and process‐induced defects

Şükür

Elmas

Eskizeybek

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

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“…Bottenea et al. 12 presented the influence of feed rate, tow temperature, tow tension, and compaction pressure on gaps and overlaps in the laminate. Results revealed that gaps and overlaps were possible to be minimized or avoided by controlling above manufacturing parameters.…”

Section: Introductionmentioning

confidence: 99%

Effect of the attitude fine-adjustment of compaction roller on automated fiber placement defects and trajectory

Cheng

Zhao

Chen

et al. 2019

Journal of Reinforced Plastics and Composites

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Automated fiber placement shows great potential for fabricating complex aircraft structures. During AFP process, the process-induced defects and placement trajectory have important effect on the processing quality. These defects and trajectory are influenced by many factors, where the attitude of compaction roller is an important factor. By the attitude fine-adjustment of compaction roller, the placement defects and trajectory can be improved. It is necessary to study the effect of the attitude fine-adjustment of compaction roller on placement defects and trajectory. The attitude includes yaw and roll of compaction roller, and the placement defects mainly refer to the fitness degree and fiber pull-up. Firstly, the placement ability of compaction roller is defined by making full use of the allowable distance. Then, the yaw angle and position of compaction roller are calculated by differential geometry. Meanwhile, the yaw distance and placement width are given. Secondly, the fiber pull-up is defined and described as planar sinusoidal based on the fiber waviness theory. Then the roll angle and position of compaction roller are given. Finally, a series of experiments and simulations had been conducted to verify the feasibility of the developed method. Results demonstrate that the method can improve the placement defects and trajectory.

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Sensitivity of Automated Fibre Placement Parameters on Manufacturing Defects in Laminated Composites

Cited by 2 publications

References 2 publications

An experimental implication of long‐term hot‐wet‐aged carbon fiber/polyether ketone ketone composites: The impact of automated fiber placement process parameters and process‐induced defects

An experimental implication of long‐term hot‐wet‐aged carbon fiber/polyether ketone ketone composites: The impact of automated fiber placement process parameters and process‐induced defects

Effect of the attitude fine-adjustment of compaction roller on automated fiber placement defects and trajectory

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