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

fYear

2013

fDate

25-27 Oct. 2013

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA), 2013 Symposium on

Conference_Location

Changsha

Print_ISBN

978-1-4799-3289-4

Type

conf

DOI

10.1109/SPAWDA.2013.6841091

Filename

6841091