Graphite/polyimide tension tests at elevated and cryogenic temperatures

Interim results for characterizing tension properties of graphite/polyimide laminates are reported. Existing test procedures for resin-matrix composites were evaluated for use through the extreme temperature range indicated above. Of particular concern was the performance of resistance strain gages at the elevated temperatures and tests were carried out to compare their performance against that of a capacitive strain gage. Limited design data are reported for graphite/polyimide laminates which are being produced through the CASTS Project.