Designing curing conditions in order to analyse the influence of process-induced stresses upon some mechanical properties of carbon / epoxy laminates at constant Tg and degree of cure
| Autor: | Ihab El Sawi, Philippe Olivier |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Materials science
Micromechanics Thermosetting polymer 02 engineering and technology Epoxy Composite laminates 021001 nanoscience & nanotechnology 020303 mechanical engineering & transports 0203 mechanical engineering Acoustic emission visual_art Ultimate tensile strength visual_art.visual_art_medium General Materials Science Composite material 0210 nano-technology Curing (chemistry) Tensile testing |
| Zdroj: | International Journal of Material Forming. 3:1373-1389 |
| ISSN: | 1960-6214 1960-6206 |
| Popis: | In the aim to study of the effects of process-induced stresses upon some mechanical properties of simple stacking sequence composite laminates, three different cure cycles were designed. This was achieved on the basis of a cure kinetics modelling. A minimum number of curing parameters were modified in order to restrain changes in material physical properties. Those latter were determined from the molecular network of the thermosetting matrix to the fibres volume fraction and thermal expansion of the laminated plates. The level of process-induced stresses generated by the three cure cycles was assessed by measuring the out-of-plane deflection on unsymmetrical laminated strips. Manufactured laminates were submitted to a set of tensile tests in order to determine the changes in their mechanical properties due to the different curing conditions. All the mechanical tests were followed by acoustic emission. This has enabled to distinguish the occurrence of the various damaging processes with respect to curing conditions and therefore process-induced stresses. Lastly, process-induced stresses on a micromechanical level were theoretically determined. This determination has enabled a first analysis of the effects of process-induced stresses upon mechanical properties to be settled. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink