Location

La Jolla, CA

Start Date

1-1-1987 12:00 AM

Description

Fiber-reinforced composite materials have excited significant interest among industries needing to fabricate structures which are both light in weight and high in stiffness. Therefore, much attention has been paid by researchers over the past decade to composite materials and their properties. One active area of endeavor has been the topic of wave propagation studies [1–8]. Several theoretical approaches have been attempted to render tractable the complicated problem of wave propagation in an anisotropic material with microstructure. Many of these theories are quite useful in their region of applicability. We have reviewed briefly this earlier work in a previous paper [9] and will not recapitulate those comments here. The specific problem with which we are now concerned centers on the role of the structure itself and the influence of its surrounding media on dispersive behavior in guided wave propagation. Since all our measurements have been conducted in a frequency regime where the sound wavelength is much larger than the fiber diameter, we adopt a continuum mixture approach to account for the combined fiber-matrix mechanical properties of the composite. A detailed description of this model is found elsewhere in these Proceedings [10].

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

6B

Chapter

Chapter 6: Advanced Composites

Section

Properties

Pages

1085-1092

DOI

10.1007/978-1-4613-1893-4_124

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Ultrasonic Dispersion in Fluid-Coupled Composite Plates

La Jolla, CA

Fiber-reinforced composite materials have excited significant interest among industries needing to fabricate structures which are both light in weight and high in stiffness. Therefore, much attention has been paid by researchers over the past decade to composite materials and their properties. One active area of endeavor has been the topic of wave propagation studies [1–8]. Several theoretical approaches have been attempted to render tractable the complicated problem of wave propagation in an anisotropic material with microstructure. Many of these theories are quite useful in their region of applicability. We have reviewed briefly this earlier work in a previous paper [9] and will not recapitulate those comments here. The specific problem with which we are now concerned centers on the role of the structure itself and the influence of its surrounding media on dispersive behavior in guided wave propagation. Since all our measurements have been conducted in a frequency regime where the sound wavelength is much larger than the fiber diameter, we adopt a continuum mixture approach to account for the combined fiber-matrix mechanical properties of the composite. A detailed description of this model is found elsewhere in these Proceedings [10].