Acoustic Emission Waveform Analysis in Composites

Thumbnail Image
Date
1991
Authors
Enoki, Manabu
Kishi, Teruo
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Research Projects
Organizational Units
Journal Issue
Is Version Of
Versions
Series
Series
Review of Progress in Quantitative Nondestructive Evaluation
Center for Nondestructive Evaluation

Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.

This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.

Department
Abstract

Many ceramic matrix composites have been investigated to enhance fracture toughness of ceramics. Especially in continuous fiber reinforced ceramics remarkable increase of toughness has been reported [1,2]. In such composites, it is very important that the mechanism of stress shielding can enhance fracture toughness, in which crack bridging and sliding of interface between matrix and fiber occur and then stress is transferred. The SiC fiber reinforced glass composite was used as a model material where friction between matrix and fiber provides stress transfer. The interfacial shear stress of this composite has been measured by the indentation method [3,4]. AE waveforms during this test were recorded. In this paper we try to identify the microfracture mechanisms by using AE radiation pattern which is a far-field displacement of AE waveform [5,6]. Quantitative parameters of microcracking such as size and mode in monolithic materials have been evaluated by using the advanced AE measuring system with 6 channels and analysis system [7]. However, there are many types of microfracture in these composites and mechanical model of each microfracture for AE is not clear. Here we try to classify microfractures into several types. And then fracture process of this composite will be discussed.

Comments
Description
Keywords
Citation
DOI
Copyright
Tue Jan 01 00:00:00 UTC 1991