Experimental dynamic performance of an Aluminium-MRE shallow shell
Jiawei Zhang,Tanju Yildirim,Guru Prakash Neupane,Yuechuan Tao,Jiang Bingnong,Weihua Li
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.
(1) Jiawei Zhang, Yuechuan Tao — School of Electrical and Information Engineering, The University of Sydney, Sydney, NSW2006, Australia
(2) Tanju Yildirim, Guru Prakash Neupane — Research School of Electrical, Energy and Materials Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, ACT 2601, Australia
(3) Jiang Bingnong — School of Mechanical and Mechatronic Engineering, University of Technology Sydney, Sydney NSW2007
(4) Weihua Li — School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong 2522, Australia.
PDF Viewer
Preview is limited to the first 3 pages. Sign in to access the full PDF.
