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Smart Structures and Systems Volume 22, Number 1, July 2018 , pages 71-79 DOI: https://doi.org/10.12989/sss.2018.22.1.071 |
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Experimental nonlinear vibrations of an MRE sandwich plate |
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Jiawei Zhang, Tanju Yildirim, Gursel Alici, Shiwu Zhang and Weihua Li
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| Abstract | ||
| The nonlinear vibration analysis of a magneto-rheological elastomer (MRE) sandwich plate is conducted experimentally. Experiments have been performed in order to construct the frequency-response curves in the vicinity of the fundamental natural frequency of an MRE sandwich plate (plate A) in either the absence or presence of a localised external magnetic field at 3 different geometrical locations, for both small and medium magnetic fields. Furthermore, experiments have also been conducted on a pure aluminium plate (plate B) with an equal thickness to the MRE sandwich plate (plate A) in order to examine the influence of the MRE layer on the nonlinear dynamics of the system. An electrodynamic shaker was used to directly force each system and the displacement at the centre of the plate was measured. Meanwhile, permanent magnets were used to apply a localised magnetic field for the experiments where the MRE sandwich plate was subject to an external magnetic field. It was observed all the MRE systems displayed strong hardening-type nonlinear behaviour, however, with increasing magnetic field this behaviour transitioned to a weak hardening-type nonlinearity. | ||
| Key Words | ||
| experiments; sandwich plate; magneto-rheological elastomer; frequency-response; nonlinear dynamics | ||
| Address | ||
| Jiawei Zhang and Weihua Li: School of Mechanical, Materials and Mechatronics Engineering, University of Wollongong, NSW 2522, Australia Tanju Yildirim: College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China Gursel Alici: School of Mechanical, Materials and Mechatronics Engineering, University of Wollongong, NSW 2522, Australia; ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Innovation Campus, NSW 2522, Australia Shiwu Zhang: Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui 230027, China | ||