Crack Propagation Analysis Using Acoustic Emission Sensors for Structural Health Monitoring Systems

<table>Sensor placement regions around a crack tip (a) receives lowest energy waves, (b) receives highest energy waves, and (c) receives lower energy waves compared to (d).</table>

The Scientific World Journal

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Figure 4

Figure 4: Crack Propagation Analysis Using Acoustic Emission Sensors for Structural Health Monitoring Systems 