NDLI: Acousto-ultrasonic analysis of failure in ceramic matrix composite tensile specimens

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Acousto-ultrasonic analysis of failure in ceramic matrix composite tensile specimens

Content Provider	NASA Technical Reports Server (NTRS)
Author	Kautz, Harold E. Chulya, Abhisak
Copyright Year	1993
Description	Three types of acousto-ultrasonic (AU) measurements, stress-wave factor (SWF), lowest antisymmetric plate mode group velocity (VS), and lowest symmetric plate mode group velocity (VL), were performed on specimens before and after tensile failure. Three different Nicalon fiber architectures with ceramic matrices were tested. These composites were categorized as 1D (unidirectional fiber orientation) SiC/CAS glass ceramic, and 2D and 3D woven SiC/SiC ceramic matrix materials. SWF was found to be degraded after tensile failure in all three material categories. VS was found to be degraded only in the 1D SiC/CAS. VL was difficult to determine on the irregular specimen surfaces but appeared unchanged on all failed specimens. 3D woven specimens with heat-treatment at high temperature exhibited degradation only in SWF.
File Size	501645
Page Count	12
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19930019884
Archival Resource Key	ark:/13960/t7wm66g20
Language	English
Publisher Date	1993-06-01
Access Restriction	Open
Subject Keyword	Nondestructive Tests Ceramic Matrix Composites Heat Treatment Acoustic Measurement Tensile Tests Glass Silicon Carbides Ceramics Woven Composites Ultrasonic Tests Failure Analysis Stress Waves Fiber Orientation Matrix Materials Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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