A laser interferometer dilatometer for thermal expansion measurements of compositesA high precision Fizeau type, laser interferometer dilatometer system has been developed for low expansion composite materials. The strain resolution is about 1 microstrain. The system is automated to operate over a large temperature range and record data during the test in real time. A technique has been developed to reduce the fringe data in real time to length changes. The dilatometer system is described and thermal expansion measurements for several fiber-reinforced and particle filled composites are presented.
Document ID
19860028587
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Tompkins, S. S. (NASA Langley Research Center Hampton, VA, United States)
Bowles, D. E. (NASA Langley Research Center Hampton, VA, United States)
Kennedy, W. R. (Kentron International, Inc. Hampton, VA, United States)