Details
| Original language | English |
|---|---|
| Title of host publication | High-Power Laser Materials Processing |
| Subtitle of host publication | Applications, Diagnostics, and Systems IX |
| Editors | Stefan Kaierle, Stefan W. Heinemann |
| Publisher | SPIE |
| ISBN (electronic) | 9781510633094 |
| Publication status | Published - 2 Mar 2020 |
| Externally published | Yes |
| Event | High-Power Laser Materials Processing: Applications, Diagnostics, and Systems IX 2020 - San Francisco, United States Duration: 4 Feb 2020 → 5 Feb 2020 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 11273 |
| ISSN (Print) | 0277-786X |
| ISSN (electronic) | 1996-756X |
Abstract
Carbon fibre reinforced plastics (CFRP), particularly with a thermoplastic matrix material, have increasingly been used in the last decades. This is especially true in industrial sectors with a strong focus on lightweight applications such as the aviation industry. During the production of CFRP parts imperfections can occur resulting in the need of rework. Furthermore, a damage can occur in service time. In both cases, a large amount of carbon fibres and matrix material has to be mechanically removed, which comes along with high tool wear. Afterwards, the area has to be refilled. This is done by adhesive bonding of CFRP patches. Normal adhesives have long curing times of several hours. To enhance the repair process of thermoplastic CFRP, a two step laser based process was developed. In the first step, CFRP is removed by laser ablation, which allows a high reproducibility and accuracy. Goal is to generate a flat surface with a defined matrix amount. In the second step, laser heat conduction welding is used to refill the removed area with thermoplastic patches. This study was conducted with a carbon fiber fabric within a polyphenylene sulfide matrix. In order to develop a high quality heat conduction process, the ablation process was optimized to generate a defined surface. For the evaluation of the welding process, lap shear samples were welded with different setups. These samples were tested and fraction pattern evaluated.
Keywords
- Ablation, CFRP, PPS, Repair, Welding
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Computer Science(all)
- Computer Science Applications
- Mathematics(all)
- Applied Mathematics
- Engineering(all)
- Electrical and Electronic Engineering
Cite this
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- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
High-Power Laser Materials Processing: Applications, Diagnostics, and Systems IX. ed. / Stefan Kaierle; Stefan W. Heinemann. SPIE, 2020. 112730G (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11273).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Laser based repair of CFRP for the aerospace industry
AU - Wippo, Verena
AU - Hirt, Simon
AU - Dittmar, Hagen
AU - Jaeschke, Peter
AU - Kaierle, Stefan
AU - Overmeyer, Ludger
N1 - Funding Information: The authors would like to thank the Federal Ministry for Economic Affairs and Energy (BMWI) for funding these investigations within the project HyPatchRepair (20E1721B) of the German federal aeronautical research program.
PY - 2020/3/2
Y1 - 2020/3/2
N2 - Carbon fibre reinforced plastics (CFRP), particularly with a thermoplastic matrix material, have increasingly been used in the last decades. This is especially true in industrial sectors with a strong focus on lightweight applications such as the aviation industry. During the production of CFRP parts imperfections can occur resulting in the need of rework. Furthermore, a damage can occur in service time. In both cases, a large amount of carbon fibres and matrix material has to be mechanically removed, which comes along with high tool wear. Afterwards, the area has to be refilled. This is done by adhesive bonding of CFRP patches. Normal adhesives have long curing times of several hours. To enhance the repair process of thermoplastic CFRP, a two step laser based process was developed. In the first step, CFRP is removed by laser ablation, which allows a high reproducibility and accuracy. Goal is to generate a flat surface with a defined matrix amount. In the second step, laser heat conduction welding is used to refill the removed area with thermoplastic patches. This study was conducted with a carbon fiber fabric within a polyphenylene sulfide matrix. In order to develop a high quality heat conduction process, the ablation process was optimized to generate a defined surface. For the evaluation of the welding process, lap shear samples were welded with different setups. These samples were tested and fraction pattern evaluated.
AB - Carbon fibre reinforced plastics (CFRP), particularly with a thermoplastic matrix material, have increasingly been used in the last decades. This is especially true in industrial sectors with a strong focus on lightweight applications such as the aviation industry. During the production of CFRP parts imperfections can occur resulting in the need of rework. Furthermore, a damage can occur in service time. In both cases, a large amount of carbon fibres and matrix material has to be mechanically removed, which comes along with high tool wear. Afterwards, the area has to be refilled. This is done by adhesive bonding of CFRP patches. Normal adhesives have long curing times of several hours. To enhance the repair process of thermoplastic CFRP, a two step laser based process was developed. In the first step, CFRP is removed by laser ablation, which allows a high reproducibility and accuracy. Goal is to generate a flat surface with a defined matrix amount. In the second step, laser heat conduction welding is used to refill the removed area with thermoplastic patches. This study was conducted with a carbon fiber fabric within a polyphenylene sulfide matrix. In order to develop a high quality heat conduction process, the ablation process was optimized to generate a defined surface. For the evaluation of the welding process, lap shear samples were welded with different setups. These samples were tested and fraction pattern evaluated.
KW - Ablation
KW - CFRP
KW - PPS
KW - Repair
KW - Welding
UR - http://www.scopus.com/inward/record.url?scp=85083335313&partnerID=8YFLogxK
U2 - 10.1117/12.2540479
DO - 10.1117/12.2540479
M3 - Conference contribution
AN - SCOPUS:85083335313
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - High-Power Laser Materials Processing
A2 - Kaierle, Stefan
A2 - Heinemann, Stefan W.
PB - SPIE
T2 - High-Power Laser Materials Processing: Applications, Diagnostics, and Systems IX 2020
Y2 - 4 February 2020 through 5 February 2020
ER -