Ultrasonic plate wave evaluation of composite laminates

Author

Chimenti, D.E.

Author_Institution

Center for Nondestructive Evaluation, Johns Hopkins Univ., Baltimore, MD, USA

fYear

1991

fDate

8-11 Dec 1991

Firstpage

863

Abstract

An ultrasonic method for the nondestructive evaluation (NDE) of composite laminates using mode-converted plate waves is explained analytically and physically, and the validity of the analytical modeling is demonstrated in direct comparisons which have been made to experiments. The NDE technique developed from these studies is discussed in terms of applications to several specific categories of composite defects. A simple model of reflection from zones of porosity is developed and compared to data. Results of two-transducer LLW scans of composite plates with seeded defects are presented, showing the nature and extend of the LLW spectrum perturbation caused by the various types of flaws

Keywords

flaw detection; laminates; surface acoustic waves; ultrasonic materials testing; composite laminates; leaky Lamb waves; mode-converted plate waves; model; nondestructive evaluation; reflection; seeded defects; spectrum perturbation; ultrasonic method; zones of porosity; Acoustic waves; Anisotropic magnetoresistance; Geometry; Inspection; Laminates; Pulse measurements; Quality assurance; Reflection; Surface treatment; Viscosity;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1991. Proceedings., IEEE 1991

Conference_Location

Orlando, FL

Type

conf

DOI

10.1109/ULTSYM.1991.234069

Filename

234069