Controlling The Damping Behavior Of Pitch-Based Carbon Fibers

Item

Title
Controlling The Damping Behavior Of Pitch-Based Carbon Fibers
Report Number
WL-TR-91-3078 Volume III, p. HAA-1 thru HAA-11
Creator
Eckel, Andrew J.
Jones, Stephen J.
Corporate Author
National Aeronautics and Space Administration
Clemson University
Date
1991
Date Issued
1991-08
Extent
11
Identifier
ADA241313
Format
1 online resource
Abstract
The damping capacity of intercalated graphite fibers has been found to be significantly greater than that of pristine fibers. An effort is discussed to control and optimize the damping behavior via intercalation. A resonant flexural free decay test method was used to measure the damping of single pristine and intercalated pitch-based carbon fibers (Thornel PlOO). The fibers were tested in high vacuum, at temperatures from 77 K to 675 K, and at frequencies from 50 to 2000 hz. The fibers were intercalated by two methods. The resulting damping capacities are compared and contrasted. The effects of
changes in the intercalation processes are discussed as a means of controlling the fiber damping capacity. In addition, the retention of increased damping capacity following thermal cycling was measured and is discussed.
Description
The damping capacity of intercalated graphite fibers has been found to be significantly greater than that of pristine fibers. An effort is discussed to control and optimize the damping behavior via intercalation. A resonant flexural free decay test method was used to measure the damping of single pristine and intercalated pitch-based carbon fibers (Thornel PlOO). The fibers were tested in high vacuum, at temperatures from 77 K to 675 K, and at frequencies from 50 to 2000 hz. The fibers were intercalated by two methods. The resulting damping capacities are compared and contrasted. The effects of
changes in the intercalation processes are discussed as a means of controlling the fiber damping capacity. In addition, the retention of increased damping capacity following thermal cycling was measured and is discussed.
Distribution Classification
1
Distribution Conflict
No
DTIC Record Exists
No
Illinois Tech Related
No
Photo Quality
Not Needed
Report Availability
Full text available
Type
article
Is Part Of
Proceedings of Damping '91: 13-15 February 1991 San Diego, California (GCA-1 through JCB-17)
Media
articleHAA

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Title Class
Proceedings of Damping '91: 13-15 February 1991 San Diego, California (GCA-1 through JCB-17)

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