Investigations on stamping of C/PEEK laminates: Influence on meso-structure and macroscopic mechanical properties under severe environmental conditions |
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| Affiliation: | 1. Institute of Polymer Product Engineering, Johannes Kepler University, Altenbergerstraße 69, 4040 Linz, Austria;2. Institute of Polymer Injection Moulding and Process Automation, Johannes Kepler University, Altenbergerstraße 69, 4040 Linz, Austria;3. Center for Lightweight Composite Technologies, Engel Austria GmbH, Steyrer Straße 20, 4300 St. Valentin, Austria;1. Université de Lyon, LaMCoS UMR 5259, INSA-Lyon, 27 Av. Jean Capelle, F-69621 Villeurbanne, France;2. Solvay R&I, ARTi/APMD, 87 Rue des Frères Perret, 691192 Saint Fons, France;1. Institute of Polymer Product Engineering, Johannes Kepler University, Altenbergerstraße 69, 4040 Linz, Austria;2. Center for Lightweight Composite Technologies, ENGEL AUSTRIA GmbH, Steyrer Straße 20, 4300 St. Valentin, Austria;1. Groupe de Physique des Matériaux UMR 6634 CNRS, INSA Rouen, av. de l’Université, 76801 Saint Etienne du Rouvray, France;2. Université de Toulouse, INSA, UPS, Mines Albi – ICA/ISAE, 10 av. E. Belin, 31055 Toulouse, France;1. Département de génie mécanique, Université du Québec à Trois-Rivières, 3351 boul. des Forges, Trois-Rivières, QC G9A 5H7, Canada;2. Département de génie mécanique, École de technologies supérieures, 1100 rue Notre-Dame Ouest, Montréal, QC H3C 1K3, Canada |
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| Abstract: | This study was aimed at addressing the influence of stamping on the mechanical performance (tensile, in-plane shear and inter-laminar shear) of fabric reinforced thermoplastic laminates under severe conditions. The effects of processing have been discussed at different levels: influence on the micro-structure (porosity and mean free path) and meso-structure (reinforcement and matrix distribution), changes in the matrix properties as well as in the fiber/matrix interface. The obtained results and the SEM observations suggest that these changes are closely associated with the macroscopic mechanical behavior of laminates. Stamping proved to be a re-consolidation process, and the high stamping pressure promotes two primary mechanisms: re-compaction of the fiber network and migration of melted matrix. These mechanisms significantly influence the meso-structure properties (better interlaminar adhesion and fiber/matrix bonding), resulting in the improvement of the material properties. |
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| Keywords: | A Thermoplastic resin B Environmental degradation D Mechanical testing E Compression moulding |
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