Tensile Damage Study of Wind Turbine Tower Material Q345 Based on an Acoustic Emission Method.

After the beginning of the strengthening phase, the signal parameters showed a decreasing trend until the necking phase when almost no signal was generated.

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From Figure 13 a we can find that in terms of the proportion of each cumulative parameter component, the normalized cumulative energy parameter differ from the other cumulative parameters in the two phases where a clear trend change occurs (yielding phase and fracture moment).

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In the elastic stage, the overall change in the ring count is not significant, while the ring count shows an increasing trend after entering the plastic yielding stage.

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