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Transverse Coefficient of Thermal Expansion Measurements of Carbon Fibers Using ESEM at High TemperaturesThe transverse coefficient of thermal expansion (CTE) of single IM7, T1000, and P55 carbon fibers are measured at elevated temperatures. The specimens are prepared by press-fitting fiber tows into 0.7mm-diameter cavity in a graphite disk of 5mm in diameter and 3mm high. The specimens are placed on a crucible in an ESEM, and images of the fiber cross section are taken as the fibers are heated up to 800 C. Holding time, heating and cool down cycles are also introduced. The geometrical changes are measured using a graphics tablet. The change in area/perimeter is calculated to determine the strain and transverse CTE for each fiber. In a complimentary computational effort, displacements and stresses are calculated with finite element models.
Document ID
20030105969
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Ochoa, O.
(Texas A&M Univ. College Station, TX, United States)
Jiang, J.
(Texas A&M Univ. College Station, TX, United States)
Putnam, D.
(Texas A&M Univ. College Station, TX, United States)
Lo, Z.
(Texas A&M Univ. College Station, TX, United States)
Ellis, A.
(Texas A&M Univ. College Station, TX, United States)
Effinger, Michael
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Subject Category
Nonmetallic Materials
Meeting Information
Meeting: 27th Annual Conference on Composites, Materials and Structures
Location: Cocoa Beach, FL
Country: United States
Start Date: January 27, 2003
End Date: January 31, 2003
Funding Number(s)
CONTRACT_GRANT: NAG8-1882
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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