Immersion Apparatus for Ultrasonic Measurements
NAVAL ORDNANCE LAB WHITE OAK MD
Pagination or Media Count:
An immersion apparatus for making ultrasonic measurements was constructed. The apparatus is used to measure longitudinal and shear sound speeds in polymeric materials as a function of temperature as well as sound absorption measurements. Polyhexamethylene adipamide, PMMA, polypropylene, polyoxymethylene, polyethylene, polystyrene, and Teflon were evaluated and the measurements were compared favorably with available literature values. Using the immersion apparatus, sound speed measurements are accurate to or -2 percent while absorption measurements are accurate to or -10 percent.
- Test Facilities, Equipment and Methods