RESEARCH AND DEVELOPMENT OF A HIGH TEMPERATURE CAPACITANCE STRAIN GAGE
Abstract
The report describes the research and development of a high temperature capacitance strain gage. The investigation consisted of a material and configuration study followed by a manufacturing and evaluation phase. The final configuration was a stress frame with a capacitor element composed of stainless steel plates and mica dielectric insulators. The overall size of the stress frame was 1 by 1 by 0.1 inch. Of the 40 sensors constructed, 15 were evaluated and 25 were delivered to the Air Force Flight Dynamics Laboratory. The gages were tested from 75F (24C) to 1500F (816C) on a constant moment bending beam with strains up to 0.0015 inch per inch. From the results obtained it can be concluded that the developed capacitance gage provides a positive and accurate means of measuring strain at temperatures up to at least 1500F (816C). Not all of the contract target specifications were met but the unique configuration of the gage allows for precalibration which does provide a gage that outperforms the intent of the target specifications in every respect.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1968
- Accession Number
- AD0834962
Entities
People
- Lester E. Vaughn
- O. L. Gillette
Organizations
- Hughes Aircraft Company