Mechanical stress evaluation of steel utilizing its magnetic properties: an inverse problem approach

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• 作者：Vandenbossche ; Lode ; Dupr&eacute ; Luc ; De Wulf ; Marc ; Melkebeek ; Jan
• 关键词：75.60.Ej ; 81.40.Rs ; Magnetic hysteresis ; quasi-static/dynamic ; Everett mapping ; Stress evaluation
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2004
• 出版时间：May, 2004
• 年：2004
• 卷：272-276
• 期：Supplement
• 页码：E535-E537
• 全文大小：214 K

文摘

The evaluation technique presented below is able to identify uniaxial mechanical stress starting from experimentally observed magnetic properties. Aiming to evaluate time-varying stress, dynamic excitation conditions for the magnetic measurements are essential. The presented technique can be applied to materials for which the excess loss is negligible: the mechanical state of the material is then assumed to be correlated with its quasi-static magnetic characteristics only. For the extraction of the quasi-static magnetic properties out of the experimental observations, a dynamic hysteresis model has been used which describes the dynamic behaviour in terms of the induction B and dB/dt.