Abstract
This chapter addresses aspects of Lamb wave propagation in CFRP plates and their interaction with different inhomogeneities and defects. Intrinsic inhomogeneities result from the manufacturing process combining rovings to fabrics or non-crimp fabrics and from the geometry of the structure. Some fabrics like twill even bring up ribs including certain angles with the warp and weft threads. Local geometric inhomogeneities result from design such as attached components or edges, holes or inserts.
Such inhomogeneities, caused by the material and the geometry of the CFRP component, induce diagnostic signals in SHM and have to be distinguished from defects the SHM system should detect.
The physical nature of both, the inhomogeneities and the defects, is the local change of the acoustic impedance of the plate. Therefore, both transmit and reflect parts of the acoustic energy of the incident wave. Differences in their behavior may be found in the degrees of transmission and reflection and in the occurrence of mode conversion.
The following investigations are focused on generation, properties, and basic interactions of fundamental S 0 and A 0 modes with inhomogeneities and defects.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Ahmad ZAB (2011) Numerical simulation of Lamb waves in plates using a semi-analytical finite element method. VDI Fortschritt-Berichte Reihe 20 Nr. 437
Alleyne D, Cawley P (1991) A two-dimensional Fourier transform method for the measurement of propagating multimode signals. J Acoust Soc Am 89:1159–1168
Boller C, Biemanns C, Staszewski WJ, Worden K, Tomlinson GR (1999) Structural damage monitoring based on an actuator-sensor system. In: SPIE Vol. 3668, Smart Structures and Integrated Systems, pp 285–294
Chang FK (1999) Composite structures with built-in diagnostic. In: Proceedings of the ICCM12, Paper 799
Fritzen CP, T SR (2009) Modelling of wave propagation and impedance spectra with the spectral element method. In: Proceedings of the 7th international workshop on structural health monitoring, pp 2282–2289
Giurgiutiu V (2008) Structural health monitoring with piezoelectric wafer active sensors. Academic Press, Elsevier
Huang H, Pamphile T, Derriso M (2008) The effect of actuator bending on Lamb wave displacement fields generated by a piezoelectric patch. Smart Mater Struct 17:1–13
Köhler B (2006) Dispersion relations in plate structures studied with a scanning laser vibrometer. In: Proceedings of the 9th European NDT conference, ECNDT
Li J, Liu S (2008) The application of time-frequency transform in mode identification of Lamb waves. In: Proceedings of the 17th world conference on nondestructive testing
Mook G, Willberg C, Gabbert U, Pohl J (2014) Lamb wave mode conversion in CFRP. In: Proceedings of the 11th European conference on non-destructive testing
Moulin E, Assaad J, Delebarre C, Kaczmarek H, Balageas D (1997) Piezoelectric transducer embedded in a composite plate: application to Lamb wave generation. J Appl Phys 82:2049–2055
Neumann MN, Hennings B, Lammering R (2014) Quasi continuous mode conversion of Lamb waves in CFPR plates due to inhomogeneity on micro and meso scale. In: Proceedings of the 7th European workshop on structural health monitoring
Osmont D, Dupont M, Lemistre M, Gouyon R, Kaczmarek H, Balageas D (1999) Piezoelectric based health monitoring systems for composite plates. In: Proceedings of the 10th international conference on adaptive structures and technologies, ICAST’99
Pohl J, Mook G (2010) SHM of CFRP-structures with impedance spectroscopy and Lamb waves. Int J Mech Mater Des 6:53–62
Pohl J, Mook G, Lammering R, von Ende S (2010) Laser-vibrometric measurement of oscillating piezoelectric actuators and of Lamb waves in CFRP plates for structural health monitoring. In: Proceedings of the 9th international conference on vibration measurements by laser and non-contact techniques, vol 1253, pp 65–72
Pohl J, Szewieczek A, Hillger W, Mook G, Schmidt D (2010) Determination of Lamb wave dispersion data for SHM. In: Proceeding of the 5th European workshop on structural health monitoring, pp 931–936
Salas KI, S NK, Cesnik CES (2009) Characterization of guided wave excitation and propagation in composite plates. In: Proceedings of the 7th international workshop on structural health monitoring, pp 651–658
Staszewski WJ, Lee B, Mallet K, Scarpa F (2004) Structural health monitoring using scanning laser vibrometry I: Lamb wave sensing. Smart Mater Struct 14:251–260
Su Z, Ye L (2009) Identification of damage using Lamb waves. Springer, Berlin
Vivar-Perez JM, Willberg C, Gabbert U (2009) Simulation of piezoelectric induced Lamb waves in plates. Proc Appl Math Mech 9:503–504
von Ende S, Lammering R (2009) Modeling and simulation of Lamb wave generation with piezoelectric plates. Mech Adv Mater Struct 16:188–197
Willberg C, Vivar-Perez JM, Ahmad ZAB, Gabbert U (2009) Simulation of piezoelectric induced Lamb waves in plates. In: Proceedings of the 7th international workshop on structural health monitoring, pp 2299–3006
Willberg C, Mook G, Gabbert U, Pohl J (2012) The phenomenon of continuous mode conversion of Lamb waves in CFRP plates. Key Eng Mater 518:364–374
Windisch T, Schwarz R, Schubert L, Köhler B (2010) Angle resolved study of Lamb wave generation and experimental investigation of wave attenuation by laser vibrometry. In: Proceeding of the 5th European conference on structural health monitoring
Żak A, Krawczuk M, Ostachowicz W (2010) Propagation of guided elastic waves in shell-type aircraft structural elements. In: Proceedings of the 5th European workshop on structural health monitoring, pp 1031–1038
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 Springer International Publishing AG
About this chapter
Cite this chapter
Mook, G., Pohl, J., Simonin, Y. (2018). Lamb Wave Generation, Propagation, and Interactions in CFRP Plates. In: Lammering, R., Gabbert, U., Sinapius, M., Schuster, T., Wierach, P. (eds) Lamb-Wave Based Structural Health Monitoring in Polymer Composites. Research Topics in Aerospace. Springer, Cham. https://doi.org/10.1007/978-3-319-49715-0_19
Download citation
DOI: https://doi.org/10.1007/978-3-319-49715-0_19
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-49714-3
Online ISBN: 978-3-319-49715-0
eBook Packages: EngineeringEngineering (R0)