Nonlinear Guided Wave Spectroscopy for Early Damage Detection
Conference: Publication Date: 16 March 2015Testing Method: ,
Material degradation often starts with changes in the microstructure that do not affect the bulk linear elastic material behavior. Degradation may continue to form macroscale damage and eventually cause failure. Few nondestructive methods are available to assess microstructural features. Such methods would enable condition-based life prediction at a much earlier point in the service life of the structure and change the way life cycles are managed. The potential of mixing primary guided wave modes to generate combinational higher harmonics that are sensitive to the early stages of damage development is demonstrated. The method is based on the interaction of two ultrasonic guided waves at a point. The interaction of these waves generates higher harmonics at combinational frequencies due to the lattice anharmonicity. Combinational frequencies are much preferred to integer multiples of the excitation frequency from a measurement system perspective. The spectroscopy method is applicable for plates and shells (including pipes) and will be demonstrated on an aluminum plate using magnetostrictive transducers and the fundamental shear horizontal mode. The results indicate that localized microstructural damage can be detected without the use of a historical baseline.
- Chillara, V.K. and Lissenden, C.J., 2012, “Interaction of guided wave modes in isotropic nonlinear elastic plates: higher harmonic generation,” J. Appl. Phys. 111, 124909.
- Chillara, V.K. and Lissenden, C.J., 2013, “Analysis of second harmonic guided waves in pipes using a large radius asymptotic approximation for axis-symmetric longitudinal modes,” Ultrasonics 53:862-869.
- Chillara, V.K. and Lissenden, C.J., 2014, “Nonlinear guided waves in plates: a numerical perspective,” Ultrasonics Vol. 54, pp. 1553-1558.
- Lissenden, C.J., Liu, Y., Choi, G.W., Yao, X., 2014, “Effect of localized microstructure evolution on higher harmonic generation of guided waves,” J. Nondestruct. Eval. 33(2):178-186.
- Liu, Y., Chillara, V.K., Lissenden, C.J., 2013a, “On selection of primary modes for generation of strong internally resonant second harmonics in plate,” J. Sound Vib. 332(19):4517-4528.
- Liu, Y., Khajeh, E., Lissenden, C.J., Rose, J.L., 2013b, “Interaction of torsional and longitudinal guided waves in weakly nonlinear circular cylinders,” J. Acoustic Soc. Am. 133(5):2541-2553.
- Liu, Y., Lissenden, C.J., Rose, J.L., 2013c, “Cumulative second harmonics in weakly nonlinear plates and shells,” In: Kundu T. (ed) Health Monitoring of Structural and Biological Systems, Proceedings of SPIE, Vol. 8695, paper 869528.
- Liu, Y., Chillara, V.K. Lissenden, C.J. Rose, J.L., 2013d, “Cubic nonlinear shear horizontal and Rayleigh Lamb waves in weakly nonlinear plates,” J. Appl. Phys. Vol. 114:114908.
- Liu, Y., Lissenden, C.J., Rose, J.L., 2014a, “Higher order interaction of elastic waves in weakly nonlinear circular cylinders. I. analytical foundation,” J. Appl. Phys. 115:214901.
- Liu, Y., Khajeh, E., Lissenden, C.J., Rose, J.L., 2014b, “Interaction of elastic waves in weakly nonlinear circular cylinders. II. physical interpretation and numerical simulation,” J. Appl. Phys. 115:214902.
- Rose, J.L., 2014, Ultrasonic Guided Waves in Solid Media, Cambridge.
- Van Den Abeele, K.E.A., Johnson, P.A., Sutin, A., 2000, “Nonlinear elastic wave spectroscopy (NEWS) techniques to discern material damage, part I: nonlinear wave modulation spectroscopy (NWMS)”, Res. Nondestr. Eval. 12:17- 30.
60 Page Views
0 PDF Downloads
0 Facebook Shares