Location

Snowbird, UT, USA

Start Date

1-1-1999 12:00 AM

Description

Horizontally polarized shear waves offer high sensitivity for inspection of adhesively bonded structures. They produce a strong shear deformation on the adherent-adhesive interface allowing a relatively direct estimation of the adhesive failure (disbonds). Compared to localized conventional point-by-point ultrasonic waves, horizontal shear guided waves can be launched over long distances and larger areas of structural parts can be covered. Guided horizontal shear waves have a multimodal character and do not exhibit mode conversion at interfaces. The first fundamental symmetric shear mode (HS0) propagates non-dispersively in isotropic materials, while higher orders modes are dispersive and behave as guided Lamb waves.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

18B

Chapter

Chapter 5: Engineered Materials

Section

Coatings, Interfaces, and Bonds

Pages

1501-1508

DOI

10.1007/978-1-4615-4791-4_193

Language

en

File Format

application/pdf

Share

COinS
 
Jan 1st, 12:00 AM

Disbond Detection and Characterization Using Horizontally Polarized Shear Waves and EMAT Probes

Snowbird, UT, USA

Horizontally polarized shear waves offer high sensitivity for inspection of adhesively bonded structures. They produce a strong shear deformation on the adherent-adhesive interface allowing a relatively direct estimation of the adhesive failure (disbonds). Compared to localized conventional point-by-point ultrasonic waves, horizontal shear guided waves can be launched over long distances and larger areas of structural parts can be covered. Guided horizontal shear waves have a multimodal character and do not exhibit mode conversion at interfaces. The first fundamental symmetric shear mode (HS0) propagates non-dispersively in isotropic materials, while higher orders modes are dispersive and behave as guided Lamb waves.