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Guided circumferential waves for nondestructive testing of interfacial surface defects in multi-layered thick-walled hollow cylinders

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2013年06期
Page:
875-879
Research Field:
Publishing date:

Info

Title:
Guided circumferential waves for nondestructive testing of interfacial surface defects in multi-layered thick-walled hollow cylinders
Author(s):
Zhang Huiling1Yin Xiaochun2He Bin1
1.Division of Mechanics,Nanjing University of Technology,Nanjing 211816,China;
2.School of Sciences,NUST,Nanjing 210094,China
Keywords:
multi-layered thick-walled hollow cylinders interfacial surface defects guided circumferential waves nondestructive testing
PACS:
TB122
DOI:
-
Abstract:
To test the interlayer interfacial surface defects of cylindrical structures,an analysis equation of the propagation of guided circumferential waves in multi-layered thick-walled hollow cylinders is deduced.The phenomena of the frequency dispersion and resultant displacement are studied by using computer programming when the guided circumferential waves are propagating in multi-layered thick-walled hollow cylinders.Compared with the frequency dispersion curves of guided circumferential waves in single-layered hollow cylinders,the phenomena of the frequency dispersion and mode interactions are found when guided circumferential waves are propagating in multi-layered thick-walled hollow cylinders.The first wave mode approaches to the Rayleigh wave when the frequency tends to infinity.The second wave mode has larger energy distribution near the interface,which can be used for the non-destructive detection of the interfacial surface defects.The maximum resultant displacement moves outward with the increase of the wave number.The frequency of the method proposed here can be used for the nondestructive testing when the energy is distributing near the interface.

References:

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Last Update: 2013-12-31