caa a22 4500 463223187 CHVBK 20180405153218.0 cr unu---uuuuu 170326e20070301xx s 000 0 eng 10.1007/s10853-006-1011-x doi (NATIONALLICENCE)springer-10.1007/s10853-006-1011-x Effect of water on the fatigue behaviour of a pa66/glass fiberscomposite material [Elektronische Daten] [S. Barbouchi, V. Bellenger, A. Tcharkhtchi, Ph. Castaing, T. Jollivet] The aim of this study is to evaluate the effect of the humidity on the long term behaviour of glass fiber reinforced thermoplastic in fatigue. Two sets of samples were studied, one set contained 0.2wt% of water, the second 3.5wt%. The fatigue tests are performed at a 10Hz frequency, at room temperature and two various relative humidity ratios, 50% RH and 96% RH. The S-N curve of dried samples (0.2%) is above the one of humid samples (3.5%), the endurance limit at 107 cycles for dried samples is equal to 40MPa against 35MPa for the second set. For a given strain, the fatigue life is higher for humid samples because the induced stress is much lower due to the plasticizing effect of water. Though the tests are carried out at room temperature (23°C), the sample temperature at the surface reaches values higher than Tg and whatever the applied strain, the matrix is in a rubbery state when the fracture occurs. On the basis of S.E.M. examinations, the following scenario is proposed: crack initiation at the fiber end, crack propagation along the fiber sides going with debonding, then crack propagation in the rubbery matrix. Springer Science+Business Media, LLC, 2007 Barbouchi S. LIM, ENSAM 151 Bd de l'Hôpital, 75013, Paris, France aut Bellenger V. LIM, ENSAM 151 Bd de l'Hôpital, 75013, Paris, France aut Tcharkhtchi A. LIM, ENSAM 151 Bd de l'Hôpital, 75013, Paris, France aut Castaing Ph CETIM, IPC, 74 Route de la Jonelière, BP 82617, 44326, Nantes Cedex 3, France aut Jollivet T. CETIM, IPC, 74 Route de la Jonelière, BP 82617, 44326, Nantes Cedex 3, France aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/6(2007-03-01), 2181-2188 0022-2461 42:6<2181 2007 42 10853 https://doi.org/10.1007/s10853-006-1011-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1011-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Barbouchi S. LIM, ENSAM 151 Bd de l'Hôpital, 75013, Paris, France aut NATIONALLICENCE 700 1- Bellenger V. LIM, ENSAM 151 Bd de l'Hôpital, 75013, Paris, France aut NATIONALLICENCE 700 1- Tcharkhtchi A. LIM, ENSAM 151 Bd de l'Hôpital, 75013, Paris, France aut NATIONALLICENCE 700 1- Castaing Ph CETIM, IPC, 74 Route de la Jonelière, BP 82617, 44326, Nantes Cedex 3, France aut NATIONALLICENCE 700 1- Jollivet T. CETIM, IPC, 74 Route de la Jonelière, BP 82617, 44326, Nantes Cedex 3, France aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/6(2007-03-01), 2181-2188 0022-2461 42:6<2181 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer