Calibration characteristics of IRAD GAGE vibrating wire stressmeter at normal and high temperature, volume 1

Calibration studies of the IRAD GAGE Vibrating Wire Stressmeter are described. The work was performed to understand and interpret the behavior and performance of the stressmeter in Climax granite. To help interpret the results obtained in Climax granite, the study also included calibration tests of the gage in other materials: Barre granite, aluminum, and Lucite. Stressmeter calibrations were carried out in thin rock slabs by determining the relation between the stressmeter readings and uniaxial plane stresses. Calibrations were also conducted under biaxial and triaxial stress fields.