Title :
Numerical analysis of the interaction of Rayleigh wave to the sub-surface cracks
Author :
Wei Wang ; Yong-dong Pan ; Zheng Zhong
Author_Institution :
Sch. of Aerosp. Eng. & Appl. Mech., Tongji Univ., Shanghai, China
Abstract :
The interaction of ultrasonic waves with cracks is analyzed numerically in this paper. The nonlinear effect due to the asymmetric stiffness called contact acoustic nonlinearity (CAN) is focused. Longitudinal wave and Raleigh wave are excited separately to investigate their nonlinear interaction with cracks. Numerical results demonstrate that super-harmonics and sub-harmonics can be generated, and frequency of Rayleigh wave only in certain range can excite the harmonics when has some relations with depth of crack.
Keywords :
Rayleigh waves; elastic constants; numerical analysis; surface cracks; ultrasonic waves; Rayleigh wave; asymmetric stiffness; contact acoustic nonlinearity; longitudinal wave; nonlinear effect; nonlinear interaction; numerical analysis; sub-harmonics; subsurface cracks; superharmonics; ultrasonic wave interaction; Acoustics; Harmonic analysis; Numerical models; Strain; Stress; Surface cracks; Surface waves; Contact acoustic nonlinearity; Harmonics; Numerical analysis;
Conference_Titel :
Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA), 2013 Symposium on
Conference_Location :
Changsha
Print_ISBN :
978-1-4799-3289-4
DOI :
10.1109/SPAWDA.2013.6841091
