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