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Fatigue of Aircraft Structures

The Journal of Institute of Aviation

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The MMM Expert System: From a Reference Signal to The Method Validation

Mirosław Witoś


This paper presents the first step in the methodological approach to the validation of the metal magnetic memory (MMM) method in the non-destructive testing (NDT) applications and in the systems used for diagnosis of early stages of material fatigue in mechanical constructions (structural health monitoring, SHM, and prognosis health management, PHM). The study is focused on the properties of the external natural source of magnetisation of the object under MMM examination and the impact of the magnetisation components. The precise data obtained from measurements of the Earth's geomagnetism (from ground stations and satellites) and the revised model of the Earth's magnetism can be applied in order to calibrate high sensitivity magnetic field sensors, validate the measurement results and extend the functional capacity of the MMM method.

Keywords : geomagnetic field; magneto-mechanical effects; numerical model; SHM

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: Fatigue of Aircraft Structures, 2012, 4, 123–140, 2300-7591, https://doi.org/10.2478/v10164-012-0064-3.

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