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Acoustic testing of high temperature panelsResults are presented of a series of thermal-acoustic tests conducted on the NASA Langley Research Center Thermal-Acoustic Test Apparatus to (1) investigate techniques for obtaining strain measurements on metallic and carbon-carbon materials at elevated temperature; (2) document the dynamic strain response characteristics of several superalloy honeycomb thermal protection system panels at elevated temperatures of up to 1200 F; and (3) determine the strain response and sonic fatigue behavior of four carbon-carbon panels at both ambient and elevated temperatures. A second study tested four carbon-carbon panels to document panel dynamic response characteristics at ambient and elevated temperature, determine time to failure and faliure modes, and collect continuous strain data up to panel failure. Strain data are presented from both types of panels, and problems encountered in obtaining reliable strain data on the carbon-carbon panels are described. The failure modes of the carbon-carbon panels are examined.
Document ID
19910027832
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Leatherwood, Jack D.
(NASA Langley Research Center Hampton, VA, United States)
Clevenson, Sherman A.
(NASA Langley Research Center Hampton, VA, United States)
Powell, Clemans A.
(NASA Langley Research Center Hampton, VA, United States)
Daniels, Edward F.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 14, 2013
Publication Date
October 1, 1990
Subject Category
Acoustics
Report/Patent Number
AIAA PAPER 90-3939
Accession Number
91A12455
Distribution Limits
Public
Copyright
Other

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