PSI - Issue 39

O.N. Belova et al. / Procedia Structural Integrity 39 (2022) 761–769 Author name / Structural Integrity Procedia 00 (2021) 000–000

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2. Holographic interferometry experiments: experimental setup and experimental procedure The experimental setup used is shown in fig. 1. The experimental setup consists of a traditional polariscope setup and a digital image camera. All the specimens in this work such as calibration discs and plates with the central crack were made by casting of polycarbonate. Experimental specimens were machined from the sheet to get the test specimens. The specimens being investigated are ten tension strips 120 mm long by 50 mm wide and 5,4 mm thick. Material properties of the material are Young’s modulus 3 E GPa = , Poisson’s ration 0.3 ν = . The interference fringes in the compressed disc under vertical and horizontal polarization are shown in fig. 2.

Fig. 1. Photograph of the experimental apparatus used to visualize and capturing the fringe patterns.

Fig. 2 Interference picture of isodromes in the compressed disk.