相切零点
When a ferromagnetism items is under the application of stress, the phenomenon that the tangential component of magnetic leakage field has maximum value and that the normal component of magnetic leakage field changes polarity and acquires zero value at the stress concentration zone will take place.
铁磁性工件在受到应力作用时,在应力集中处会有漏磁场的切向分量出现最大值、同时法向分量改变符号且过零值点的现象。
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