PSI - Issue 68

A. Ceci et al. / Procedia Structural Integrity 68 (2025) 372–378 A. Ceci et al. / Structural Integrity Procedia 00 (2025) 000–000

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Fig. 5 : Mesh of the unit Cell

Fig. 6 : Vertical Displacements applied and clamped constraints a) Frontal view, b) Side view. Regarding image analysis, in the Discrete Fourier Transform, the repetition rate of the cellular structure's periodicity is measured in terms of frequencies and , and from these values, the strain is calculated as follows (Salvini, P. et al. (2015)): = − (2) In Digital Image Correlation, the displacement of a portion of the image that has undergone deformation/translation within the original image is tracked. The magnitude of the displacement is expressed by the pixel coordinates in the different images (L is the displacement). = $ − % % (3) Figure 7 shows the results in terms of von Mises stress obtained from the numerical analysis. There is a maximum displacement along the load direction of 11 mm. The maximum von Mises stress occurs in areas where the structure begins to fail.