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Polymers
Volume 14
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10.3390/polym14071401
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Article

Research on Void Dynamics during In Situ Consolidation of CF/High-Performance Thermoplastic Composite

by
Qinghua Song
1,
Weiping Liu
1,*,
Jiping Chen
1,
Dacheng Zhao
2,
Cheng Yi
1,
Ruili Liu
1,
Yi Geng
1,
Yang Yang
1,
Yizhu Zheng
1 and
Yuhui Yuan
1
1
Composites Center, COMAC Shanghai Aircraft Manufacturing Co., Ltd., Shanghai 201324, China
2
College of Material Science and Engineering, Donghua University, Shanghai 201620, China
*
Author to whom correspondence should be addressed.
Polymers 2022, 14(7), 1401; https://doi.org/10.3390/polym14071401
Submission received: 21 February 2022 / Revised: 20 March 2022 / Accepted: 22 March 2022 / Published: 30 March 2022
(This article belongs to the Special Issue Advanced Thermoplastic Polymers and Composites)
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Abstract

Automated fiber placement (AFP) in situ consolidation of continuous CF/high-performance thermoplastic composite is the key technology for efficient and low-cost manufacturing of large thermoplastic composites. However, the void in the in situ composite is difficult to eliminate because of the high pressure and the short consolidation time; the void content percentage consequently is the important defect that determines the performance of the thermoplastic composite parts. In this paper, based on the two-dimensional Newtonian fluid extrusion flow model, the void dynamics model and boundary conditions were established. The changes of the void content percentage were predicted by the cyclic iteration method. It was found that the void content percentage increased gradually along the direction of the layers’ thickness. With the increasing of the laying speed, the void content percentage increased gradually. With the increasing of the pressure of the roller, the void content percentage gradually decreased. When the AFP speed was 11 m/min and the pressure of the compaction roller reached 2000 N, the void content percentage of the layers fell below 2%. It was verified by the AFP test that the measured results of the layers’ thickness were in good agreement with the predicted results of the model, and the test results of the void content percentage were basically equivalent to the predicted results at different AFP speeds, which indicates that the kinetic model established in this paper is representative to predict the void content percentage. According to the metallographic observation, it was also found that the repeated pressure of the roller was helpful to reduce the void content percentage.
Keywords: thermoplastic composites; automated fiber placement; in situ consolidation; void content; processing parameters thermoplastic composites; automated fiber placement; in situ consolidation; void content; processing parameters

Share and Cite

MDPI and ACS Style

Song, Q.; Liu, W.; Chen, J.; Zhao, D.; Yi, C.; Liu, R.; Geng, Y.; Yang, Y.; Zheng, Y.; Yuan, Y. Research on Void Dynamics during In Situ Consolidation of CF/High-Performance Thermoplastic Composite. Polymers 2022, 14, 1401. https://doi.org/10.3390/polym14071401

AMA Style

Song Q, Liu W, Chen J, Zhao D, Yi C, Liu R, Geng Y, Yang Y, Zheng Y, Yuan Y. Research on Void Dynamics during In Situ Consolidation of CF/High-Performance Thermoplastic Composite. Polymers. 2022; 14(7):1401. https://doi.org/10.3390/polym14071401

Chicago/Turabian Style

Song, Qinghua, Weiping Liu, Jiping Chen, Dacheng Zhao, Cheng Yi, Ruili Liu, Yi Geng, Yang Yang, Yizhu Zheng, and Yuhui Yuan. 2022. "Research on Void Dynamics during In Situ Consolidation of CF/High-Performance Thermoplastic Composite" Polymers 14, no. 7: 1401. https://doi.org/10.3390/polym14071401

APA Style

Song, Q., Liu, W., Chen, J., Zhao, D., Yi, C., Liu, R., Geng, Y., Yang, Y., Zheng, Y., & Yuan, Y. (2022). Research on Void Dynamics during In Situ Consolidation of CF/High-Performance Thermoplastic Composite. Polymers, 14(7), 1401. https://doi.org/10.3390/polym14071401

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