Location

Brunswick, ME

Start Date

1-1-1990 12:00 AM

Description

The propagation of ultrasound in fiber-reinforced composites is controlled by the relative magnitudes of characteristic length variables. These length variables are the wavelength (Λ), the fiber diameter (a), the thicknesses of plies (h), and the overall thickness of the component (H). It may generally be assumed that Λ is much larger than the fiber diameter (a ~ 8 µm). On the other hand wavelengths of the order of thicknesses of plies (h ~ 100 µm), but smaller than the overall thickness of the component may well occur. In that range of wavelengths the propagation of ultrasonic waves gives rise to interesting multiple reflection phenomena which are the topic of this paper.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

9B

Chapter

Chapter 7: Engineered Materials

Section

Properties of Composites

Pages

1379-1386

DOI

10.1007/978-1-4684-5772-8_177

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Localization of Ultrasound in Thick Composites

Brunswick, ME

The propagation of ultrasound in fiber-reinforced composites is controlled by the relative magnitudes of characteristic length variables. These length variables are the wavelength (Λ), the fiber diameter (a), the thicknesses of plies (h), and the overall thickness of the component (H). It may generally be assumed that Λ is much larger than the fiber diameter (a ~ 8 µm). On the other hand wavelengths of the order of thicknesses of plies (h ~ 100 µm), but smaller than the overall thickness of the component may well occur. In that range of wavelengths the propagation of ultrasonic waves gives rise to interesting multiple reflection phenomena which are the topic of this paper.