Location

Brunswick, ME

Start Date

1-1-1997 12:00 AM

Description

Guided waves scattered from defects in solid material might contain significant information about those defects. The major goal of non-destructive evaluation is to interpret the ultrasonic signatures from these defects. Scattering of Lamb waves from a normal, surface breaking defect is considered in this study. Reflection and transmission factors of the scattered modes are used to reconstruct the size of the flaws. Scattering Lamb waves from a crack have been investigated in [1–7]. Resonance phenomena for a crack parallel to the plate surface is considered in [5,6]. In this study, the boundary element method combined with the normal mode technique [1,8] is used to study the relationship between crack size and the parameters of the incident mode. Irregular behavior of the reflection coefficient for special parameters of the incident mode is used for size classification.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

16A

Chapter

Chapter 1: Standard Techniques

Section

UT Guided Waves

Pages

137-143

DOI

10.1007/978-1-4615-5947-4_18

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

The Boundary Element Method for Flaw Classification in Wave Guides

Brunswick, ME

Guided waves scattered from defects in solid material might contain significant information about those defects. The major goal of non-destructive evaluation is to interpret the ultrasonic signatures from these defects. Scattering of Lamb waves from a normal, surface breaking defect is considered in this study. Reflection and transmission factors of the scattered modes are used to reconstruct the size of the flaws. Scattering Lamb waves from a crack have been investigated in [1–7]. Resonance phenomena for a crack parallel to the plate surface is considered in [5,6]. In this study, the boundary element method combined with the normal mode technique [1,8] is used to study the relationship between crack size and the parameters of the incident mode. Irregular behavior of the reflection coefficient for special parameters of the incident mode is used for size classification.