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- W2130606988 abstract "Based on the theory of nonlinear ultrasonic, material early mechanical degradation is associated with the microstructural changes such as dislocation and slip band. When a single sinusoidal ultrasonic wave is launched to a nonlinear medium, the higher harmonics will be generated. A FEM model of nonlinear was established by a special element which account for a nonlinear stress-strain relation. Calculation was performed for the influence of the micro-defect with different length and quantity to ultrasonic nonlinearity parameter. This research develops a robust experimental procedure. There is linear relationship between amplitudes of the second-harmonic waves and the squared fundamental waves as a function of increasing input voltage amplitude. Using this system, ultrasonic nonlinearity parameters of a magnesium sample were measured. The experimental results show that there is a significant increase in nonlinearity parameters linked to fatigue degree; Ultrasonic nonlinearity parameters can characterize the early fatigue damage of magnesium." @default.
- W2130606988 created "2016-06-24" @default.
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- W2130606988 date "2010-06-01" @default.
- W2130606988 modified "2023-09-27" @default.
- W2130606988 title "FEM simulation and experimental study of fatigue damage measurement in magnesium using nonlinear ultrasonic" @default.
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- W2130606988 doi "https://doi.org/10.1109/mace.2010.5536538" @default.
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