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Study on UV laser machining quality of carbon fibre reinforced composites
Authors:Z.L. Li  H.Y. Zheng  G.C. Lim  P.L. Chu  L. Li
Affiliation:1. Singapore Institute of Manufacturing Technology (SIMTech), 71 Nanyang Drive, Singapore 638075;2. Laser Processing Research Centre, School of Mechanical, Aerospace and Civil Engineering, University of Manchester, Oxford Road, Manchester M139PL, United Kingdom;1. School of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China;2. Key Laboratory of Aero Engine Extreme Manufacturing Technology of Zhejiang Province, Ningbo 315201, China;3. PKU-HKUST ShenZhen-HongKong Institution, Shenzhen 518057, China;1. Center of Physics and Engineering of Advanced Materials (CeFEMA), Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;2. Instituto Superior de Engenharia de Lisboa, Avenida Conselheiro Emídio Navarro No. 1, 1959-007 Lisboa, Portugal;3. Instituto Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;4. DEMec, FEUP, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal;5. Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial, Rua Dr. Roberto Frias 400, 4200-465 Porto, Portugal;1. TRUMPF Laser- und Systemtechnik GmbH, Johann-Maus-Straße 2, 71254 Ditzingen, Germany;2. Institut für Strahlwerkzeuge, University of Stuttgart, Pfaffenwaldring 43, D-70569 Stuttgart, Germany;3. GKN Aerospace Deutschland GmbH, Brunhamstr. 21, 81249 München, Germany;1. Department of Chemical, Materials and Production Engineering, University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy;2. CIRTIBS Laboratory, University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy;3. Department of Industrial Engineering, University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy;1. School of Mechanical Engineering, Donghua University, Shanghai, China;2. Shanghai Collaborative Innovation Center for High Performance Fiber Composites, Donghua University, Shanghai, China;3. Institute of Artificial Intelligence, Donghua University, Shanghai, China;1. Joining and Welding Research Institute, Osaka University, 1-11 Mihogaoka, Ibaraki, Osaka, Japan;2. Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan;3. Institute of Laser Technology, 1-8-4 Utsubo-honmachi, Nishi-Ku, Osaka, Japan;4. Advanced Laser and Process Technology Research Association, 1-17-1, Toranomon, Minato-ku, Tokyo 105-0001, Japan
Abstract:
The large differences in material properties of the carbon fibre and the epoxy resin in carbon fibre reinforced plastic (CFRP) composite make laser processing very challenging. The heat affected zone (HAZ) has been the major obstacle for wide industry applications of laser machining of CFRP composites. This paper investigates the quality of CFRP machined by a diode pumped solid state (DPSS) UV laser. The results show that minimum HAZ (about 50 μm) is achievable in machining of CFRP composite by using short pulsed UV laser. The study found that heat is easily accumulated in the material during laser processing, especially when the carbon fibres are sliced into small pieces. The paper discusses how to make use of the heat accumulation and how to avoid potential damage by the heat accumulation. Bearing strengths test and fracturing mechanisms study were conducted. Method of characterization of thermal damage in polymer matrix is developed.
Keywords:
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