An alternating current potential drop technique is presented that exploits anisotropic magnetostriction to monitor changes in applied stress in steel. The background to the technique is provided together with an ad hoc approximation that describes the sensitivity of the sensor to the underlying properties. A uniaxial loading experiment has been conducted on duplex and mild steel specimens showing that changes in stress are measureable. Saturation and hysteresis afflict the measurement, which, in addition to sensitivity to temperature and magnetisation, may undermine inversion. With the capabilities and limitations of the proposed technique introduced, guidance on possible suitable applications are given, concluding that use for monitoring the number and relative size of fatigue stress cycles may be a suitable and attractive opportunity.

中文翻译：

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使用定向电位降技术进行磁应力监测

提出了一种交流电势降技术，该技术利用各向异性磁致伸缩来监测钢中施加的应力变化。该技术的背景与描述传感器对基本特性的敏感性的临时近似一起提供。对双相钢和低碳钢试样进行了单轴加载实验，结果表明应力变化是可测量的。饱和和滞后影响测量，除了对温度和磁化的敏感性外，还可能破坏反演。随着所提出技术的能力和局限性的介绍，给出了可能的合适应用的指导，得出结论认为，用于监测疲劳应力循环的数量和相对大小可能是一个合适且有吸引力的机会。