Location

La Jolla, CA

Start Date

1-1-1993 12:00 AM

Description

One of the most important factors determining the properties of composite materials is the fiber-matrix interface. The material on either side of the interface may have large differences in mechanical properties which could leave the interface vulnerable to microcrack initiation during loading. Since this may lead to catastrophic failure of the composite, it is essential to understand the mechanical behavior of the fiber-matix interfaces at a microscopic level. It has been observed that in many cases the interface is not discontinuous, but rather forms a continuum of three dimensional interphases wherein the material properties vary gradually over a distance of a few microns. Such interphases have been observed using both electron and acoustic microscopies. The variation of elastic properties in this interphasial region is found to play a dominant role in determining the mechanical properties of the system.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

12B

Chapter

Chapter 5: Engineered Materials

Section

Interfaces

Pages

1491-1497

DOI

10.1007/978-1-4615-2848-7_190

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Examination of Fiber-Matrix Interfaces of Composite Materials Using Dual Beam Scanning Acoustic Microscopy

La Jolla, CA

One of the most important factors determining the properties of composite materials is the fiber-matrix interface. The material on either side of the interface may have large differences in mechanical properties which could leave the interface vulnerable to microcrack initiation during loading. Since this may lead to catastrophic failure of the composite, it is essential to understand the mechanical behavior of the fiber-matix interfaces at a microscopic level. It has been observed that in many cases the interface is not discontinuous, but rather forms a continuum of three dimensional interphases wherein the material properties vary gradually over a distance of a few microns. Such interphases have been observed using both electron and acoustic microscopies. The variation of elastic properties in this interphasial region is found to play a dominant role in determining the mechanical properties of the system.