Abstract
The guided wave scattering process by different defects in plate structures is studied with a boundary element method. The purpose is to separate sharp crack-like defects from smooth volumetric-like ones by analyzing the transmission and reflection factors. The traditional normal mode expansion technique has been combined with the boundary element discretization to form a hybrid BEM scheme. With this method, the scattered near-fields and the transmission and reflection coefficients of the far-fields on individual modes can be obtained simultaneously. Several features related to the Lamb mode reflection and transmission process in a plate with these defect types are extracted and compared. The theoretical analysis provides a guideline for data acquisition and feature selection for use in the decision algorithm development program via neural nets.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 885-888 |
| Number of pages | 4 |
| Journal | Proceedings of the IEEE Ultrasonics Symposium |
| Volume | 1 |
| State | Published - 1998 |
| Event | Proceedings of the 1998 International Ultrasonics Symposium - Sendai, Miyagi, Jpn Duration: Oct 5 1998 → Oct 8 1998 |
All Science Journal Classification (ASJC) codes
- Acoustics and Ultrasonics