Magnetoelastic Testing of Uniaxial and Biaxial Stresses
Abstract Using strain gages and special cross shaped test samples, level of Barkhausen noise is measured as a function of uniaxial and biaxial strain in a low alloy structured steel. Based on experimental results, characteristics and limitations of uniaxial calibration curves are discussed. Concept of biaxial calibration surface and its use in magnetoelastic Barkhausen noise testing of biaxial stress/strain field is introduced. Practiced method for determining both components of principal stresses/strains is proposed.
KeywordsResidual Stress Biaxial Stress Transverse Strain Biaxial Strain Initial Residual Stress
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