Computer modeling of piezoresistive gauges
Abstract
A computer model of piezoresistive gauge subject to shock loading is developed. The time-dependent two-dimensional response of the gauge is calculated. The stress and strain components of the gauge are determined assuming elastic-plastic material properties. The model is compared with experiment for four cases. An ytterbium foil gauge in a PPMA medium subjected to a 0.5 Gp plane shock wave, where the gauge is presented to the shock with its flat surface both parallel and perpendicular to the front. A similar comparison is made for a manganin foil subjected to a 2.7 Gp shock. The signals are compared also with a calibration equation derived with the gauge and medium properties accounted for but with the assumption that the gauge is in stress equilibrium with the shock medium.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- August 1981
- Bibcode:
- 1981STIN...8214500N
- Keywords:
-
- Computerized Simulation;
- Piezoelectric Gages;
- Stress-Strain-Time Relations;
- Foils (Materials);
- Manganin (Trademark);
- Mathematical Models;
- Yttrium;
- Instrumentation and Photography