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Indexed by:期刊论文

Date of Publication:2013-04-23

Journal:Applied Mechanics and Materials

Included Journals:EI、CPCI-S、Scopus

Volume:333-335

Page Number:1713-1718

ISSN No.:9783037857502

Key Words:Dispersion characteristics; Guided wave; Lamb waves; Electromagnetic ultrasonic; Nondestructive testing

Abstract:Electromagnetic ultrasonic nondestructive testing technology, which it have the advantages of withstand high temperature and without coupling agent, is widely used in Nondestructive Testing (NDT) field. To effectively detect the defects, the dispersion characteristics and multimode of guided waves in the plate are studied by the disperse simulation software, and the variation of dispersion curve is analyzed by the geometric parameters and materials of plate. The results showed that the dispersion characteristics of guided wave in the plate is depended on the thickness and material of plate, and dispersion and the multimode characteristics of plate are better at low frequencies and smaller thickness. This is helpful to selection of Electromagnetic acoustic transducer (EMAT) parameter and detection operating point of guided wave.