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Magnetic field variation induced by cyclic bending stress

机译:循环弯曲应力引起的磁场变化

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摘要

Metal magnetic memory technique has provided a new arena for assessing stress status, especially for detecting early damage in ferromagnetic materials. To investigate the magnetomechanical effect of metal magnetic memory phenomenon, the rotary bending fatigue experiments under different stress levels were conducted. The normal components of magnetic field intensities induced by cyclic bending stresses on the surfaces of 45-steel specimens were measured throughout the fatigue process. The results show that surface magnetic fields generated contains reversible and irreversible process prior to failure, while there is a substantial increase just before fracture. Possible reasons for the variations of magnetic fields and corresponding signal characteristics to identify damage zones were discussed.
机译:金属磁记忆技术为评估应力状态,特别是检测铁磁材料的早期损坏提供了一个新领域。为了研究金属磁记忆现象的磁机械效应,进行了不同应力水平下的旋转弯曲疲劳实验。在整个疲劳过程中,测量了45个钢试样表面上由周期性弯曲应力引起的磁场强度的正态分量。结果表明,产生的表面磁场在破坏之前包含可逆和不可逆的过程,而在断裂之前存在显着的增加。讨论了磁场变化和识别损坏区域的相应信号特性的可能原因。

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