Resumo

MATOS, JOSÉ et al. EVALUATION OF MICROMAGNETIC LEVEL OF TENSILE STRESS IN WIRES OF FLEXIBLES RISERS. Dyna rev.fac.nac.minas [online]. 2013, vol.80, n.177, pp.108-114. ISSN 0012-7353.

This paper reports the use of a non-destructive method that uses micromagnetic parameters to measure the stress in a wire during a tensile test in different load levels. This wires forms the structural armature of flexible risers. In this work was considered the parameters of the hysteresis curve based on Harmonic Analysis of the Tangential Magnetic Field Strength, Analysis of Barkhausen Noise Signals and the Analysis of Incremental Permeability Signals during a tensile test with load controlling. A linear regression was used to analyze the data and to correlate with the know data of applied load of the test machine. The results showed an excellent relation between the obtained measures of the micromagnetic parameters and the load applied in the sample, demonstrating a potentiality of the technique in this kind of applications.

Palavras-chave : stress characterization; micromagnetic methods; ferromagnetism.

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