Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1998-07-14
2000-11-28
Noori, Max
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73763, 324 711, G01N 332
Patent
active
061519693
ABSTRACT:
EIS and EMIS methods of assessing the fatigue status of a material. The EIS method uses an electrochemical transducer cell to apply electrical perturbations to the material, and to acquire voltage and current measurements over a range of frequencies. The impedance at each frequency is calculated, resulting in impedance spectrum data. This data is correlated to reference data representing the fatigue life of the material. The EMIS method is similar except that mechanical instead of electrical perturbations are applied to the material.
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Hudak, Jr. Stephen J.
Miller Michael A.
Noori Max
Southwest Research Institute
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