期刊
ULTRASONICS
卷 87, 期 -, 页码 33-43出版社
ELSEVIER
DOI: 10.1016/j.ultras.2018.02.005
关键词
Nonlinearity; Lamb waves; Wave mixing; Numerical simulation
资金
- National Science Foundation of China [11604033, 11632004, 11372104, 51509139]
- Key Program for International Science and Technology Cooperation Projects of Ministry of Science and Technology of China [2016YFE0125900]
- Key Project of Natural Science Foundation of CQ CSTC [0241002432002]
This paper investigates the propagation of Lamb waves in thin plates with quadratic nonlinearity by one-way mixing method using numerical simulations. It is shown that an A(0)-mode wave can be generated by a pair of S-0 and A(0) mode waves only when mixing condition is satisfied, and mixing wave signals are capable of locating the damage zone. Additionally, it is manifested that the acoustic nonlinear parameter increases linearly with quadratic nonlinearity but monotonously with the size of mixing zone. Furthermore, because of frequency deviation, the waveform of the mixing wave changes significantly from a regular diamond shape to toneburst trains. (C) 2018 Elsevier B.V. All rights reserved.
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