Location

Snowmass Village, CO

Start Date

1-1-1995 12:00 AM

Description

A new volume integral equation method (VIEM) is used to study problems involving wave scattering by multiple inclusions and cracks. The major objective of this study is to determine the characteristics of the scattered field in metal matrix composites with large fibers in presence of microcracks and other defects. Since composites consist of a large number of closely packed fibers, the elastic field in these materials is strongly affected by the interaction between microcracks and the fibers. Thus, to analyze the effects of microcracks on the scattered field in composites is of particular interest in ultrasonic NDE for crack detection and characterization. In this paper we consider the scattering of elastic waves by a distribution of long parallel fibers in presence or absence of interface debonding. We use the VIEM to calculate the scattering cross section from the fibers and discuss the possible application of the results in the nondestructive characterization of the fibermatrix interface degradation in structural composites.

Volume

14B

Chapter

Chapter 5: Engineered Materials

Section

Composite Defects

Pages

1303-1310

DOI

10.1007/978-1-4615-1987-4_166

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Scattering of Elastic Waves by Multiple Inclusions and Cracks

Snowmass Village, CO

A new volume integral equation method (VIEM) is used to study problems involving wave scattering by multiple inclusions and cracks. The major objective of this study is to determine the characteristics of the scattered field in metal matrix composites with large fibers in presence of microcracks and other defects. Since composites consist of a large number of closely packed fibers, the elastic field in these materials is strongly affected by the interaction between microcracks and the fibers. Thus, to analyze the effects of microcracks on the scattered field in composites is of particular interest in ultrasonic NDE for crack detection and characterization. In this paper we consider the scattering of elastic waves by a distribution of long parallel fibers in presence or absence of interface debonding. We use the VIEM to calculate the scattering cross section from the fibers and discuss the possible application of the results in the nondestructive characterization of the fibermatrix interface degradation in structural composites.