期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 146, 期 3, 页码 487-492出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2014.03.059
关键词
Magnetic materials; Fatigue; Mechanical properties; Hysteresis
资金
- Irish Research Council, Ireland (Irish Research Council for Science, Engineering and Technology, IRCSET)
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. Miller (S-N) curves for both isotropic and anisotropic MREs were produced by subjecting the compounds to cycling over a range of stress amplitudes (sigma(a)) 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. (C) 2014 Elsevier B.V. All rights reserved.
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