Fatigue resistance of natural rubber in seawater with comparison to air |
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| Affiliation: | 1. Ecole Centrale de Nantes, Institut de Recherche en Génie Civil et Mécanique (GeM), UMR CNRS 6183, Nantes, France;2. IFREMER, Centre de Bretagne, Marine Structures Laboratory, Brest, France;1. Centre for Elastomer Research, Focas Research Institute, Dublin Institute of Technology, Dublin 8, Ireland;2. Applied Electrochemistry Group, Focas Research Institute, Dublin Institute of Technology, Dublin 8, Ireland;3. Beijing Aeronautical Science and Technology Research Institute, Commercial Aircraft Corporation of China, PR China;1. IFREMER Centre de Bretagne, Marine Structures Laboratory, BP70, 29280 Plouzane, France;2. Thales Underwater Systems, TUS, Route des Dolines, BP 157, 06903 Sophia-Antipolis Cedex, France;3. PIMM, Arts et Métiers ParisTech, 151 Bd de l''Hôpital, 75013 Paris, France;1. Key Laboratory of Rubber-plastics, Ministry of Education/Shandong Provincial, Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology, Qing Dao, 266042, PR China;2. Institute of Molecular Aggregation Science, Tianjin Universit, Tian Jin, 300457, PR China;1. Univ Lyon, INSA Lyon, CNRS, MATEIS UMR5510, F-69621, Lyon, France;2. Centre de technologies, Manufacture Française des Pneumatiques Michelin, 63040, Clermont Ferrand Cedex 9, France |
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| Abstract: | Fatigue properties of filled natural rubber in seawater environment are investigated by uniaxial fatigue and crack propagation experiments, and the damage is analyzed by scanning electron microscopy. The behavior under relaxing and non-relaxing loading conditions is studied and the results are compared to those obtained in air environment. For relaxing loading conditions, fatigue behavior is the same in both environments. Under non-relaxing conditions at large strain levels, for which the influence of strain-induced crystallization is important, fatigue life is longer in seawater. Such behavior could be explained by increased internal temperatures of specimens tested in air due to lower heat conductivity of air as compared to seawater. Such conclusion is also supported by the damage mechanisms observed under non-relaxing loading conditions. |
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| Keywords: | Natural rubber Fatigue Environmental effects Seawater Strain-induced crystallization |
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