PSI - Issue 25

Joyraj Chakraborty et al. / Procedia Structural Integrity 25 (2020) 324–333

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Author name / Structural Integrity Procedia 00 (2019) 000–000

Fig. 4. Deflection (A) and COD (B) from DIC measurement.

Fig. 5. Location of the cracks in the beam.

3.1. Analysis of ultrasonic feature and strain gauge

During the experiment, to acquire ultrasonic signals the new data acquisition system specially designed for this novel sensors was used (more details about data acquisition system can be found in (Chakraborty et al. (2019b)). The acquisition system acquired seven raw signals for each pair of sensors per minute. In this study, the pair of ultrasonic sensors located in the bottom of the beam and vibrating wire strain gauge sensor located in the middle were chosen because both sensors were located in the same area. Therefore, they measured the same response from the beam.