Fatigue life prediction of magnetorheological elastomers subjected to dynamic equi-biaxial cyclic loading |
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| Authors: | Yanfen Zhou Stephen Jerrams Anthony Betts Lin Chen |
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| Affiliation: | 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 |
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| Abstract: | Prediction of fatigue life is of great significance in ensuring that dynamically loaded rubber components exhibit safety and reliability in service. In this text, the dynamic equi-biaxial fatigue behaviour of magnetorheological elastomer (MREs) using a bubble inflation method is described. Wöhler (S–N) curves for both isotropic and anisotropic MREs were produced by subjecting the compounds to cycling over a range of stress amplitudes (σa) between 0.75 MPa and 1.4 MPa. Changes in physical properties, including variation in stress–strain relations and complex modulus (E*) during the fatigue process were analysed. It was found that the complex modulus of MRE samples decreased throughout the entire fatigue test and failure took place at a limiting value of approximately 1.228MPa ± 4.38% for isotropic MREs and 1.295 ± 10.33% for anisotropic MREs. It was also determined that a dynamic stored energy criterion can be used as a plausible predictor in determining the fatigue life of MREs. |
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| Keywords: | Magnetic materials Fatigue Mechanical properties Hysteresis |
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