Research on mixed-frequency nonlinear Lamb waves for micro-cracks detection in plate - 文章详情页

作者：

Jiao, J. (Jiao, J..) | Meng, X. (Meng, X..) | Fan, Z. (Fan, Z..) | He, C. (He, C..) | Wu, B. (Wu, B..)

收录：

Scopus

摘要：

As　linear　ultrasonic　technique　is　usually　limited　in　detection　of　micro-cracks　in　plate,　a　nonlinear　ultrasonic　technique　using　mixed-frequency　Lamb　waves　was　proposed.　Interaction　of　pure　S0　mode　Lamb　waves　and　micro-cracks　was　simulated　by　finite　element　method.　Spectrum　analysis　was　utilized　to　extract　the　amplitude　of　sum　frequency　and　difference　frequency　in　receiving　signal.　The　impact　of　crack　length　and　crack　thickness　on　the　amplitude　of　sum　and　difference　frequency　was　also　taken　into　account.　The　results　showed　that　there　is　a　positive　relationship　between　the　crack　length　and　the　amplitude　of　sum　and　difference　frequency,　and　this　two　amplitudes　would　decrease　while　the　crack　thickness　kept　increasing.　Then　an　experiment　was　conducted　to　prove　the　feasibility　of　micro-cracks　detection　using　the　mixed-frequency　nonlinear　Lamb　waves　technique.　©　2015　IEEE.

关键词：

Frequency-mixing; Micro-crack; Nonlinear Lamb waves

作者机构：

[ 1 ] [Jiao, J.]School of Mechanical Engineering, Beijing University of Technology, Beijing, 100124, China
[ 2 ] [Meng, X.]School of Mechanical Engineering, Beijing University of Technology, Beijing, 100124, China
[ 3 ] [Fan, Z.]School of Mechanical Engineering, Beijing University of Technology, Beijing, 100124, China
[ 4 ] [He, C.]School of Mechanical Engineering, Beijing University of Technology, Beijing, 100124, China
[ 5 ] [Wu, B.]School of Mechanical Engineering, Beijing University of Technology, Beijing, 100124, China

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