Location

La Jolla, CA

Start Date

1-1-1993 12:00 AM

Description

Due to their higher strength-weight ratio, greater stiffness, stronger corrosion and wear resistance, longer fatigue life, and better thermal insulation, fiber-reinforced composite materials have been widely applied, for example, in the aerospace, automobile, marine, spacecraft, and construction industries. Evaluation of material properties, detection of defects, and prediction of life of these material is important but difficult. In the last decade, considerable attention has been focused on the use of acousto-ultrasonic (AU) and Leaky-Lamb wave techniques to evaluate material properties or changes in material properties due to fiber misorientation, flaws an defects, fiber/matrix debonding, or external loading [1–4 AU approach, with bibliography, was presented by Vary setup with a personal computer (PC) used to analyze the AU waveforms was described by Kiernan and Duke [4]. Propagation of Leaky—Lamb waves in fiber-reinforced composites was investigated theoretically and experimentally by Chimenti and Nayfeh [10, 11]. A general discussion of elastic waves in solids can be found in Ref. 9.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

12B

Chapter

Chapter 5: Engineered Materials

Section

Composite Properties

Pages

1225-1232

DOI

10.1007/978-1-4615-2848-7_156

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

An Acousto-Ultrasonic NDE Technique for Monitoring Material Anisotropy

La Jolla, CA

Due to their higher strength-weight ratio, greater stiffness, stronger corrosion and wear resistance, longer fatigue life, and better thermal insulation, fiber-reinforced composite materials have been widely applied, for example, in the aerospace, automobile, marine, spacecraft, and construction industries. Evaluation of material properties, detection of defects, and prediction of life of these material is important but difficult. In the last decade, considerable attention has been focused on the use of acousto-ultrasonic (AU) and Leaky-Lamb wave techniques to evaluate material properties or changes in material properties due to fiber misorientation, flaws an defects, fiber/matrix debonding, or external loading [1–4 AU approach, with bibliography, was presented by Vary setup with a personal computer (PC) used to analyze the AU waveforms was described by Kiernan and Duke [4]. Propagation of Leaky—Lamb waves in fiber-reinforced composites was investigated theoretically and experimentally by Chimenti and Nayfeh [10, 11]. A general discussion of elastic waves in solids can be found in Ref. 9.