Affiliations: [a] School of Aerospace, Tsinghua University, Beijing,
100084, P.R. China | [b] China Special Equipment Inspection & Research
Institute, Beijing, 100013, P.R. China
Abstract: The environmental magnetic field, the stress distribution and the
materials are the influencing factors of Magnetic Memory Method (MMM). In order
to discover the influencing rule of environmental magnetic field, different
even magnetic field is offered during the period of Magnetic Memory (MM)
signals occurred. It was found that the environmental magnetic field can change
the MM signals magnitude, can not change the curve's profile ordinarily. If the
certain magnetic field offered, the curve will be reversed. So, if the
environmental magnetic field was changed suitably, the best MM signals will be
obtained. Three kinds of materials had been used in experiments to investigate
the difference and influencing rule. The result reveals that material is an
important role which determines the value of MM signals on condition that the
stress and environmental al magnetic field are the same.It was derived from the
experimental data that the percent of C influences MM signals in a certain rule
but not linear. Those results are different with the existing MMM and improve
the MMM evaluation system. The environmental magnetic field function mechanism
can be explained by the phenomena of these experiments.
Keywords: Magnetic memory method (MMM), influencing factors, stress concentration, environmental magnetic field, material
