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http://dx.doi.org/10.12989/sss.2020.25.1.057

Experimental dynamic performance of an Aluminium-MRE shallow shell  

Zhang, Jiawei (School of Electrical and Information Engineering, The University of Sydney)
Yildirim, Tanju (Research School of Electrical, Energy and Materials Engineering, College of Engineering and Computer Science, The Australian National University)
Neupane, Guru Prakash (Research School of Electrical, Energy and Materials Engineering, College of Engineering and Computer Science, The Australian National University)
Tao, Yuechuan (School of Electrical and Information Engineering, The University of Sydney)
Bingnong, Jiang (School of Mechanical and Mechatronic Engineering, University of Technology Sydney)
Li, Weihua (School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong)
Publication Information
Smart Structures and Systems / v.25, no.1, 2020 , pp. 57-64 More about this Journal
Abstract
The nonlinear dynamics of a directly forced clamped-clamped-free-free magneto-rheological elastomer (MRE) sandwich shell has been experimentally investigated. Experiments have been conducted on an aluminium shallow shell (shell A) and an MRE-aluminium sandwich shallow shell with single curvature (shell B). An electrodynamic shaker has been used to directly force shells A and B in the vicinity of their fundamental resonance frequency; a laser displacement sensor has been used to measure the vibration amplitude to construct the frequency-response curves. It was observed that for an aluminium shell (shell A), that at small forcing amplitudes, a weak softening-type nonlinear behaviour was observed, however, at higher forcing amplitudes the nonlinear dynamical behaviour shifted and a strong hardening-type response occurred. For the MRE shell (shell B), the effect of forcing amplitude showed softening at low magnetic fields and hardening for medium magnetic fields; it was also observed the mono-curved MRE sandwich shell changed dynamics to quasiperiodic displacement at some frequencies, from a periodic displacement. The presence of a magnetic field, initial curvature, and forcing amplitude has significant qualitative and quantitative effects on the nonlinear dynamical response of a mono curved MRE sandwich shell.
Keywords
shallow shell; experimentation; mechanics; nonlinear experiments; magneto-rheological elastomer;
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Times Cited By KSCI : 2  (Citation Analysis)
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