PSI - Issue 40

O.N. Belova et al. / Procedia Structural Integrity 40 (2022) 46–60 O.N. Belova, L.V. Stepanova / Structural Integrity Procedia 00 (2022) 000 – 000

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2. Photoelastic 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 were made by casting of polycarbonate. Experimental specimens were machined from the sheet to get the test specimens. The study used ten tension strips 120 mm long by 50 mm wide and 5,4mm thick. Material properties of the photoelastic material are Young’s modulus 3 E GPa  , Poisson’s ration 0.3   and the material fringe constant is found to be 10.41 / f Pa m fringe   . The geometry of the cracked specimen and schematic representation of the load application are shown in fig. 2. The angle between the crack and the vertical line equals 60 for all specimens.

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