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| Maurin, Romain; Baley, Christophe; Cartie, Denis D. R.; Davies, Peter. |
| This paper describes results from tests to examine the influence of through-thickness pinning on in-plane shear behaviour, measured by tensile loading of +/- 45A degrees specimens. Samples were produced by both aeronautical and marine manufacturing processes. As few previous studies have investigated pinning of marine composites these were also subjected to out-of-plane shear delamination tests. For both carbon/epoxy laminates the pins reduce the apparent in-plane shear modulus and strength. Pins modify the strain field measured by full-field image analysis, and slow damage development. A new damage mechanism, transverse pin cracking, was observed. |
| Tipo: Text |
Palavras-chave: Z-pinning; Shear; Mode II; Damage; Acoustic emission. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00113/22390/20186.pdf |
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| Maurin, Romain; Perrot, Yves; Bourmaud, Alain; Davies, Peter; Baley, Christophe. |
| Polyester resins are widely employed for pleasure boat construction. In order to satisfy new environmental legislation on styrene emissions resin suppliers have proposed modified formulations, but these show lower failure strains under tensile loading. This paper examines the influence of wet ageing on mechanical properties of low styrene polyester, together with standard polyester and vinyl ester resins, and their glass reinforced composites. Results are presented from accelerated ageing in natural sea water for nine months, at temperatures of 20, 40 and 60 degrees C. Nano-indentation was used to study local changes in the resin after ageing. The diffusion kinetics of the low styrene emission resins and their composites are similar to those for standard... |
| Tipo: Text |
Palavras-chave: Polymer matrix composites (PMCs); Environmental degradation; Mechanical testing. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00000/11104/7856.pdf |
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