Location

La Jolla, CA

Start Date

1-1-1998 12:00 AM

Description

A combination of studies of dispersion behavior (wave mode properties) with time domain Finite Element modelling constitutes a very useful approach to developing guided wave NDE techniques. The dispersion curves and the mode shapes reveal a lot of information about how a guided wave will behave in a plate and can be used to judge modes and frequencies that are likely to be sensitive to defects. However, because of their modal nature, the dispersion curves cannot predict how a guided wave will react with a local geometric change in a plate such as a defect, which is of great importance to Lamb wave testing. Finite element modelling can fill in this information.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

17A

Chapter

Chapter 4: NDE Sensors and Fields

Section

UT Sensors, Transducers and Fields

Pages

1003-1010

DOI

10.1007/978-1-4615-5339-7_129

Language

en

File Format

application/pdf

Share

COinS
 
Jan 1st, 12:00 AM

Simulation of Lamb Wave Propagation Using Pure Mode Excitation

La Jolla, CA

A combination of studies of dispersion behavior (wave mode properties) with time domain Finite Element modelling constitutes a very useful approach to developing guided wave NDE techniques. The dispersion curves and the mode shapes reveal a lot of information about how a guided wave will behave in a plate and can be used to judge modes and frequencies that are likely to be sensitive to defects. However, because of their modal nature, the dispersion curves cannot predict how a guided wave will react with a local geometric change in a plate such as a defect, which is of great importance to Lamb wave testing. Finite element modelling can fill in this information.