An Investigation of Strain Sensitivity
Abstract
The following findings are the result of experimental work with the tensoeffect of compacted lead sulfide powder; 1) no matter what the initial resistance of the tensoelement (strain gage), its resistance-vs-pressure characteristics are linear; 2) no definite relation between resistance and strain sensitivity was observed in specimens not thermally treated; 3) specimen resistance linearly decreases as temperature increases within 240-330 K; up to 180K, the resistance linearly increases; 4) the strain sensitivity slightly increases or remains constant within 290-330K; 5) with a load current of 1 ma, the characteristics are still linear; some tensoelements can operate with currents of 10 ma; 6) tensoelement resistances increase with time, their sensitivity remains constant; 7) the characteristics of most specimens have improved with time; 8) after a thermal (820K) treatment, the sensitivity reaches very high values, both sensitivity and resistance vary with time according to the same law which corresponds to Slater's barrier theory.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 16, 1969
- Accession Number
- AD0700369
Entities
People
- A. N. Arseneva-geil
Organizations
- Air Force Systems Command