Surface porosity development in tool-side facesheets of honeycomb core sandwich structures during co-cure
Co-cure of honeycomb core sandwich structures combines the consolidation of composite prepreg facesheets with bonding of facesheets to a low-density core in a single thermal cycle for efficient manufacturing. The coupling of multiple process phenomena and the complex geometry of honeycomb cores, how...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2022-04-01
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| Series: | Advanced Manufacturing: Polymer & Composites Science |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/20550340.2022.2056313 |
| _version_ | 1828725116229386240 |
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| author | Daniel Zebrine Elana Wadhwani Steven Nutt |
| author_facet | Daniel Zebrine Elana Wadhwani Steven Nutt |
| author_sort | Daniel Zebrine |
| collection | DOAJ |
| description | Co-cure of honeycomb core sandwich structures combines the consolidation of composite prepreg facesheets with bonding of facesheets to a low-density core in a single thermal cycle for efficient manufacturing. The coupling of multiple process phenomena and the complex geometry of honeycomb cores, however, can lead to defects in cured parts. Effects of co-cure on void formation at the tool-side facesheet surface remain unclear. We employ autoclave processing and an in situ visualization technique to elucidate physical mechanisms by which surface porosity forms, and the effects of pressure on this formation. Results displayed a multi-stage development, including evacuation of entrapped air, followed by evolution and subsequent entrapment of dissolved volatiles in the prepreg resin, and demonstrated the utility of elevated pressure in reducing porosity. These findings describe the physics underlying porosity formation at the tool-facesheet interface, and provide insight into potential mitigation strategies to produce sandwich panels with defect-free facesheet surfaces. |
| first_indexed | 2024-04-12T13:21:38Z |
| format | Article |
| id | doaj.art-57d1a169f13044c3b2d462ab43e2fba7 |
| institution | Directory Open Access Journal |
| issn | 2055-0340 2055-0359 |
| language | English |
| last_indexed | 2024-04-12T13:21:38Z |
| publishDate | 2022-04-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Advanced Manufacturing: Polymer & Composites Science |
| spelling | doaj.art-57d1a169f13044c3b2d462ab43e2fba72022-12-22T03:31:27ZengTaylor & Francis GroupAdvanced Manufacturing: Polymer & Composites Science2055-03402055-03592022-04-0182435510.1080/20550340.2022.2056313Surface porosity development in tool-side facesheets of honeycomb core sandwich structures during co-cureDaniel Zebrine0Elana Wadhwani1Steven Nutt2M.C. Gill Composites Center, Viterbi School of Engineering, University of Southern California, Los Angeles, CA, USAM.C. Gill Composites Center, Viterbi School of Engineering, University of Southern California, Los Angeles, CA, USAM.C. Gill Composites Center, Viterbi School of Engineering, University of Southern California, Los Angeles, CA, USACo-cure of honeycomb core sandwich structures combines the consolidation of composite prepreg facesheets with bonding of facesheets to a low-density core in a single thermal cycle for efficient manufacturing. The coupling of multiple process phenomena and the complex geometry of honeycomb cores, however, can lead to defects in cured parts. Effects of co-cure on void formation at the tool-side facesheet surface remain unclear. We employ autoclave processing and an in situ visualization technique to elucidate physical mechanisms by which surface porosity forms, and the effects of pressure on this formation. Results displayed a multi-stage development, including evacuation of entrapped air, followed by evolution and subsequent entrapment of dissolved volatiles in the prepreg resin, and demonstrated the utility of elevated pressure in reducing porosity. These findings describe the physics underlying porosity formation at the tool-facesheet interface, and provide insight into potential mitigation strategies to produce sandwich panels with defect-free facesheet surfaces.https://www.tandfonline.com/doi/10.1080/20550340.2022.2056313Sandwich structurescure behaviorprocess monitoringautoclave |
| spellingShingle | Daniel Zebrine Elana Wadhwani Steven Nutt Surface porosity development in tool-side facesheets of honeycomb core sandwich structures during co-cure Advanced Manufacturing: Polymer & Composites Science Sandwich structures cure behavior process monitoring autoclave |
| title | Surface porosity development in tool-side facesheets of honeycomb core sandwich structures during co-cure |
| title_full | Surface porosity development in tool-side facesheets of honeycomb core sandwich structures during co-cure |
| title_fullStr | Surface porosity development in tool-side facesheets of honeycomb core sandwich structures during co-cure |
| title_full_unstemmed | Surface porosity development in tool-side facesheets of honeycomb core sandwich structures during co-cure |
| title_short | Surface porosity development in tool-side facesheets of honeycomb core sandwich structures during co-cure |
| title_sort | surface porosity development in tool side facesheets of honeycomb core sandwich structures during co cure |
| topic | Sandwich structures cure behavior process monitoring autoclave |
| url | https://www.tandfonline.com/doi/10.1080/20550340.2022.2056313 |
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