Accession Number : ADA119186

Title :   Piezoresistance Response of Ytterbium under Static and Dynamic Loading.

Descriptive Note : Final technical rept. Jan 81-Jan 82,

Corporate Author : SRI INTERNATIONAL MENLO PARK CA

Personal Author(s) : Gupta,Y M ; Walter,D F

PDF Url : ADA119186

Report Date : Apr 1982

Pagination or Media Count : 26

Abstract : Resistance change measurements in yitterbium foils (encapsulated in a PMMA matric) subjected to quasi-static triaxial (to 0.4 GPa) and shock wave loading (to 1.2 GPa) have been obtained. The use of a solid matrix in the quasi-static experiments is a new feature and ensures consistent comparisons between the two types of experiments. Two sets of gauge orientations, with respect to the matrix stresses, were examined in each type of experiment. Experimental results were analyzed in terms of the recently developed theoretical analysis. Both sets of experimental data confirm the general theoretical framework; an important difference between the static and dynamic measurements can be explained on the basis of the inclusion analysis. Results from these data have pointed out areas in need of refinement in the theoretical work and provided calibration data for lateral stress measurement in uniaxial strain experiments. These necessary theoretical developments, along with a determination of the piezoresistive coefficients, will be examined in the future. (Author)

Descriptors :   *Piezoelectric materials, *Ytterbium, *Static loads, *Dynamic loads, Resistance, Calibration, Measurement, Stresses, Matrix materials, Gages, Foils(Materials)

Subject Categories : Electricity and Magnetism
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE