TY - GEN
T1 - Experimental investigation into dynamics of flat and bistable plates
AU - Shaw, A.
AU - Neild, S. A.
AU - Wagg, D. J.
AU - Weaver, M. P.
PY - 2012
Y1 - 2012
N2 - Bistable plates have two stable states between which they may 'snap', and are attracting interest in the field of adaptive structures. This work presents results of an experimental investigation into the vibrations of both flat and bistable composite plates with free edges, employing a novel video method to capture the full field of vibration in 3 dimensions. For flat plates, it is shown that deflection shapes of vibration can transform from the mode shape as amplitude is increased, and that at certain frequencies two deflection shapes can be achieved depending on initial conditions. For bistable plates, it is noted that lower vibration modes can be linear up to moderate amplitudes, whereas at high amplitude highly nonlinear 'snapping' oscillations are shown. We discuss these effects in terms of the anisotropic stiffness of CFRP, and the geometric coupling between doubly-curved out of plane deflection shapes and in-plane deformations.
AB - Bistable plates have two stable states between which they may 'snap', and are attracting interest in the field of adaptive structures. This work presents results of an experimental investigation into the vibrations of both flat and bistable composite plates with free edges, employing a novel video method to capture the full field of vibration in 3 dimensions. For flat plates, it is shown that deflection shapes of vibration can transform from the mode shape as amplitude is increased, and that at certain frequencies two deflection shapes can be achieved depending on initial conditions. For bistable plates, it is noted that lower vibration modes can be linear up to moderate amplitudes, whereas at high amplitude highly nonlinear 'snapping' oscillations are shown. We discuss these effects in terms of the anisotropic stiffness of CFRP, and the geometric coupling between doubly-curved out of plane deflection shapes and in-plane deformations.
UR - http://www.scopus.com/inward/record.url?scp=84906345166&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84906345166
SN - 9781622768257
T3 - International Conference on Noise and Vibration Engineering 2012, ISMA 2012, including USD 2012: International Conference on Uncertainty in Structure Dynamics
SP - 2535
EP - 2546
BT - International Conference on Noise and Vibration Engineering 2012, ISMA 2012, including USD 2012
PB - Katholieke Universiteit Leuven
T2 - 25th International Conference on Noise and Vibration engineering, ISMA2012 in conjunction with the 4th International Conference on Uncertainty in Structural Dynamics, USD 2012
Y2 - 17 September 2012 through 19 September 2012
ER -