Lamb wave techniques are emerging as one of the most effective methods for damage detection in aeronautic structures. Lamb waves are guided waves that exist in thin wall structures with free boundaries. For a plate having a thickness of the order of a wavelength or so, surface Rayleigh waves can degenerate into Lamb waves. These waves can travel over large distances with little attenuation thus allowing the inspection of large plate-like structures with little loos of energy. The problem arrives with their dispersive nature. That is, for a given frequency multiple modes can exist, making defect identification difficult. The analytical dispersion curves give us an idea of the various existing modes and its velocities for each frequency of excitation. Therefore, it becomes necessary to choose the optimal frequency excitation, and the appropriate actuator location, to obtain the modes more adequate to defects detection. A finite element program can help in this task.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Selective excitation of Lamb wave modes in thin aluminium plates using bonded piezoceramics. FEM modelling and measurements


    Additional title:

    Selektive Anregung von Plattenwellenmoden in dünnen Aluminiumblechen mittels geklebter Piezokeramik. FEM-Modellierung und Messung


    Contributors:


    Publication date :

    2006


    Size :

    7 Seiten, 7 Bilder, 5 Quellen



    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




    Design of mode selective actuators for Lamb wave excitation in composite plates

    Schmidt, Daniel / Sinapius, Michael / Wierach, Peter | Springer Verlag | 2013


    Design of mode selective actuators for Lamb wave excitation in composite plates

    Schmidt, Daniel / Sinapius, Michael / Wierach, Peter | Online Contents | 2013



    Lamb wave assessment of fatigue damage in aluminum plates

    Grondel, S. / Moulin, E. / Delebarre, C. | Tema Archive | 1999