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Proceedings Paper

Nonintrusive interfacial characterization of advanced composite materials
Author(s): Renee M. Kent
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Paper Abstract

It is well known that the fiber matrix interface plays the dominant role in the mechanical behavior of advanced composite materials. Engineering and control of the interface is paramount to producing the properties for desired mechanical performance of the ultimate composite structure. This is particularly critical for advanced composites (metal matrix composites, ceramic matrix composites) which are currently being investigated for structural applications in aerospace and other structures. In this work, we describe a technique for in situ interfacial characterization and determination, which is demonstrated for in-process analysis and mechanical behavior studies of composites. The methodology described herein is based on an optical analysis of a guided ultrasonic signal response, but with appropriate technology, the fundamental parameters used in this study can be effectively applied to other conventional and non-conventional detection systems. The approach for analyzing the process cycle of composite materials, in-line utilizes the multi-functional use of fibers as reinforcement and sensors. The fact that typical reinforcing fibers can be effectively used as ultrasonic wave guides implies a mechanism for transfer for ultrasonic information along the length of the fiber-matrix interface. Ultimately, this information can be fed back to the processing line to update the process for optimization and affordability of manufacture.

Paper Details

Date Published: 7 July 1995
PDF: 7 pages
Proc. SPIE 2455, Nondestructive Evaluation of Aging Aircraft, Airports, Aerospace Hardware, and Materials, (7 July 1995); doi: 10.1117/12.213544
Show Author Affiliations
Renee M. Kent, National Institute of Standards and Technology (United States)

Published in SPIE Proceedings Vol. 2455:
Nondestructive Evaluation of Aging Aircraft, Airports, Aerospace Hardware, and Materials
Tobey M. Cordell; Raymond D. Rempt, Editor(s)

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