Ultrasonic techniques, such as the use of guided waves, can be ideal for finding damage in the plate and pipe-like structures used in aerospace applications. However, the interaction of waves with real flaw types and geometries can lead to experimental signals that are difficult to interpret. 3-dimensional (3D) elastic wave simulations can be a powerful tool in understanding the complicated wave scattering involved in flaw detection and for optimizing experimental techniques. We have developed and implemented parallel 3D elastodynamic finite integration technique (3D EFIT) code to investigate Lamb wave scattering from realistic flaws. This paper discusses simulation results for an aluminum-aluminum diffusion disbond and an aluminum-epoxy disbond and compares results from the disbond case to the common artificial flaw type of a flat-bottom hole. The paper also discusses the potential for extending the 3D EFIT equations to incorporate physics-based weak bond models for simulating wave scattering from weak adhesive bonds.
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17 May 2012
REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Volume 31
17–22 July 2011
Burlington, VT
Research Article|
May 17 2012
3D modeling of ultrasonic wave interaction with disbonds and weak bonds
C. Leckey;
C. Leckey
NASA Langley Research Center, Hampton, VA 23681,
USA
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M. Hinders
M. Hinders
Department of Applied Science, College of William and Mary, Williamsburg, VA 23187,
USA
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AIP Conf. Proc. 1430, 111–117 (2012)
Citation
C. Leckey, M. Hinders; 3D modeling of ultrasonic wave interaction with disbonds and weak bonds. AIP Conf. Proc. 17 May 2012; 1430 (1): 111–117. https://doi.org/10.1063/1.4716220
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