Experiment and modeling of uniaxial tension fatigue performances for filled natural rubbers |
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| Affiliation: | 1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130012, PR China;2. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, PR China;4. Ningbo Tuopu Group Co., Ltd., Ningbo 315800, PR China;5. Pan Asia Technical Automotive Center Co., Ltd., Shanghai 201201, PR China;1. LMA, CNRS, UPR 7051, Aix-Marseille Univ, Centrale Marseille, F-13402 Marseille Cedex 20, France;2. Ecole Hassania des Travaux Publics, KM 7, Route d’El Jadida, B.P 8108, Oasis, Casablanca, Morocco;1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China;2. Beijing Engineering Research Center of Advanced Elastomers, Beijing University of Chemical Technology, Beijing 100029, China;3. Centre for Elastomer Research, Technological University Dublin, Dublin, Ireland;4. School of Textile and Garment, Qingdao University, Qingdao 266071, China;1. École Centrale de Nantes, Institut de Recherche en Génie Civil et Mécanique (GeM), UMR CNRS 6183, BP 92101, 44321 Nantes Cedex 3, France;2. Arts et Métiers ParisTech, I2M-DuMAS, UMR CNRS 5295, Bordeaux, France;3. Synchrotron Soleil, L’Orme des Merisiers, BP 48, 91192 Gif sur Yvette, France;4. Michelin, Centre Technique de Ladoux, Clermont-Ferrand, France;1. Univ Rennes, CNRS, IPR (Institute of Physics Rennes), UMR 6251, F-35000 Rennes, France;2. Cooper Standard, 194 route de Lorient, 35043 Rennes, France;3. LC-DRIME, Joint Research Laboratory, Cooper Standard, Institut de Physique UMR 6251, Campus de Beaulieu, Bât. 10B, F-35042 Rennes Cedex, France;4. Laboratoire de Génie Civil et Génie Mécanique EA 3913, IUT-Université de Rennes 1, France |
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| Abstract: | A tension fatigue model of filled natural rubbers is investigated to study the contributions of two key factors, namely, the damage parameter and the specimen geometry used in the fatigue experiment. The uniaxial tension fatigue experiments were carried out for three filled natural rubber specimens with different geometry: a dumbbell simple tension specimen (STS), a dumbbell cylindrical specimen (DCS), and a hollow cylindrical specimen (HCS). The commonly used damage parameters for fatigue life prediction are discussed. The fatigue life prediction models are formulated using the measured tension fatigue life of the STS together with different damage parameters. The effectiveness of the models is established in terms of a correlation coefficient characterizing the error between the measured and predicted fatigue lives. It is concluded that all the damage parameters considered in the study can effectively estimate the tension fatigue life with correlation coefficients exceeding 0.9. The fatigue life model formulated for the STS was also found to be appropriate for predicting the fatigue life of specimens with different geometry (DCS and HCS) suggesting that the relationship between the tension fatigue life and the damage parameters is independent of the specimen geometry. One may thus conduct tension fatigue tests with STS alone in order to model the tension fatigue life of rubbers with alternate geometry. |
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| Keywords: | Fatigue life prediction Fatigue testing Damage parameter Filled natural rubber |
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