PSI - Issue 52

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Valerio Acanfora et al. / Procedia Structural Integrity 52 (2024) 340–347 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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Figure 7: Comparison between model with no damage and the model with intra-laminar damage, for the eight elements through thickness model.

Subsequently, Cohesive Zone Model (CZM) has been introduced in the numerical simulation. A classical traction separation law has been adopted in the cohesive model, defined by three parameters: initial stiffness, maximum stress, and failure energy. Furthermore, a cohesive interface has been placed between each sub-laminate of the plate. The delamination area reflects the features described in the standard ASTM D 7136, as shown in Figure 8.

Figure 8: Delaminated areas.