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Advisor(s)
Abstract(s)
An improvement of a curvature based numerical-experimental method for damage
location in structures [1] is presented. The Mach-Zehnder shearography interferometer
is used to measure the rotations field or the out-of-plane first order derivatives of
mode shapes displacement field [2, 3]. The curvatures or second order derivatives are
computed by a numerical method [4]. An aluminum beam with two small transversal
cuts was tested for damaged location. The experimental results show a high correlation
between the curvatures discontinuities field and the damages position. This study
also demonstrates the superior performance of the curvature method using measured
rotations field instead of measured displacements field.
Description
Keywords
Damage location Rotations field Mode shapes curvatures Interferometric techniques
Citation
Lopes, H.; Araújo dos Santos, J.V.; Mota Soares, C.M.; Guedes, R.M.; Vaz, M.A. (2008). An improved numerical-experimental method for damage location in structures. In The Ninth International Conference on Computational Structures Technology. Athens-Greece. ISBN 978-1-905088-22-5
Publisher
B.H.V. Topping and M. Papadrakakis