Monitoring of Strains and Deflections of a Steel Cantilever, using a Contactless Measurement Method

Abstract

The aim of the experimental and analytical work was to monitor and analyze the strains and deflections of steel cantilevers using a bistable glass-coated microwire, as a contactless measurement method. For verification and comparison, the results obtained from the applied bistable microwire (Fe75Si 9B 10P 5Tb 1), the results of a standard resistance strain gauge and dial indicator were used. Since the microwire used, has a metallic (magnetic) core, verifying the possibility of separating the influence of the parasitic external magnetic field from the measured deformations, was the first goal of the implementation of the bending test on steel cantilevers. Another goal was to find a relationship between the switching field of the microwire and the strains measured by the strain gauge, depending on the applied load during the experimental test. Both goals were achieved within this research.