Influence of a dynamic consolidation force on in situ consolidation quality of thermoplastic composite laminate

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Berend Denkena
  • Carsten Schmidt
  • Maximilian Kaczemirzk
  • Max Schwinn

External Research Organisations

  • Clausthal University of Technology
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Details

Original languageEnglish
Article number88
JournalJournal of Composites Science
Volume5
Issue number3
Publication statusPublished - 22 Mar 2021

Abstract

For achieving high quality of in situ consolidation in thermoplastic Automated Fiber Placement, an approach is presented in this research work. The approach deals with the combination of material pre-heating and sub-ultrasonic vibration treatment. Therefore, this research work investigates the influence of frequency dependent consolidation pressure on the consolidation quality. A simplified experimental setup was developed that uses resistance electrical heating instead of the laser to establish the thermal consolidation condition in a universal testing machine. Consolidation experiments with frequencies up to 1 kHz were conducted. The manufactured specimens are examined using laser scanning microscopy to evaluate the bonding interface and differential scanning calorimetry to evaluate the degree of crystallinity. Additionally, the vibration-assisted specimens were compared to specimens manufactured with static consolidation pressure only. As a result of the experimental study, the interlaminar pore fraction and degree of compaction show a positive dependency to higher frequencies. The porosity decreases from 0.60% to 0.13% while the degree of compaction increases from 8.64% to 12.49% when increasing the vibration frequency up to 1 kHz. The differential scanning calorimetry experiments show that the crystallinity of the matrix is not affected by vibration-assisted consolidation.

Keywords

    AFP, CFRP, In situ consolidation, Thermoplastic, Vibration

ASJC Scopus subject areas

Cite this

Influence of a dynamic consolidation force on in situ consolidation quality of thermoplastic composite laminate. / Denkena, Berend; Schmidt, Carsten; Kaczemirzk, Maximilian et al.
In: Journal of Composites Science, Vol. 5, No. 3, 88, 22.03.2021.

Research output: Contribution to journalArticleResearchpeer review

Denkena, B, Schmidt, C, Kaczemirzk, M & Schwinn, M 2021, 'Influence of a dynamic consolidation force on in situ consolidation quality of thermoplastic composite laminate', Journal of Composites Science, vol. 5, no. 3, 88. https://doi.org/10.3390/jcs5030088
Denkena, B., Schmidt, C., Kaczemirzk, M., & Schwinn, M. (2021). Influence of a dynamic consolidation force on in situ consolidation quality of thermoplastic composite laminate. Journal of Composites Science, 5(3), Article 88. https://doi.org/10.3390/jcs5030088
Denkena B, Schmidt C, Kaczemirzk M, Schwinn M. Influence of a dynamic consolidation force on in situ consolidation quality of thermoplastic composite laminate. Journal of Composites Science. 2021 Mar 22;5(3):88. doi: 10.3390/jcs5030088
Denkena, Berend ; Schmidt, Carsten ; Kaczemirzk, Maximilian et al. / Influence of a dynamic consolidation force on in situ consolidation quality of thermoplastic composite laminate. In: Journal of Composites Science. 2021 ; Vol. 5, No. 3.
Download
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abstract = "For achieving high quality of in situ consolidation in thermoplastic Automated Fiber Placement, an approach is presented in this research work. The approach deals with the combination of material pre-heating and sub-ultrasonic vibration treatment. Therefore, this research work investigates the influence of frequency dependent consolidation pressure on the consolidation quality. A simplified experimental setup was developed that uses resistance electrical heating instead of the laser to establish the thermal consolidation condition in a universal testing machine. Consolidation experiments with frequencies up to 1 kHz were conducted. The manufactured specimens are examined using laser scanning microscopy to evaluate the bonding interface and differential scanning calorimetry to evaluate the degree of crystallinity. Additionally, the vibration-assisted specimens were compared to specimens manufactured with static consolidation pressure only. As a result of the experimental study, the interlaminar pore fraction and degree of compaction show a positive dependency to higher frequencies. The porosity decreases from 0.60% to 0.13% while the degree of compaction increases from 8.64% to 12.49% when increasing the vibration frequency up to 1 kHz. The differential scanning calorimetry experiments show that the crystallinity of the matrix is not affected by vibration-assisted consolidation.",
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