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A combined optical-thermal model for near-infrared laser heating of thermoplastic composites in an automated tape placement process |
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| Affiliation: | 1. Composite Centre, AMRC (Advanced Manufacturing Research Centre) with Boeing, University of Sheffield, Sheffield S60 5ZT, UK;2. Physics Department, Faculty of Science, Mansoura University, Egypt;1. Institute for Carbon Composites, Technische Universität München, Faculty of Mechanical Engineering, Boltzmannstrasse 15, D-85748 Garching b. München, Germany;2. General Electric Global Research, Composites Manufacturing Laboratory, Freisinger Landstrasse 50, D-85748 Garching b. München, Germany;1. ARC Training Centre for Automated Manufacture of Advanced Composites, Research School of Engineering, Australian National University, Canberra, ACT 2600, Australia;2. Chair of Carbon Composites, TUM Department of Mechanical Engineering, Technical University of Munich, Boltzmannstrasse 15, D-85748 Garching, Germany |
| Abstract: | A combined optical-thermal model is presented for near-infrared laser heating of carbon fibre reinforced thermoplastic composites in an automated tape placement process. For the first time a three dimensional ray tracing model is presented for a near-infrared laser tape placement process which captures the unique anisotropic scattering behaviour of the composite. Predicted irradiance distributions on the composite are subsequently applied to a 2D non-linear finite element thermal model. It is shown that a shadow is present in the process and causes a significant drop in temperature prior to the consolidation zone. The effect of various source and surface model simplifications was also studied. The modelled temperature profiles agree well with experimental data. Substrate fibre orientation was investigated and found to have only a small influence on the temperature history. |
| Keywords: | A Polymer–matrix composites (PMCs) B Optical properties/techniques C Finite element analysis (FEA) E Thermal analysis |
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