PSI - Issue 47

Rachid Bensaada et al. / Procedia Structural Integrity 47 (2023) 503–512 R. Bensaada et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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3. Results and discussions 3.1 Numerical validation of characterization

The stress-strain curve deduced by experimental data (Fig. 1) is subsequently used for the Hashin damage model identification. The model formulation is given by (Barbero et al. 2013). The material model parameters are given by Table 1 while damage parameters are given by Table 2.

Table 1. Elastic properties E 1 (MPa)

E 2 (MPa)

Nu 12

G 12 (MPa)

G 13 (MPa)

G 23 (MPa)

7015

7015

0.45

2446

2446

2446

Table 2. Damage parameters σ L - σ T (MPa)

Τ L -T T (MPa)

G f (kJ/m²)

569

58

750

a)

b)

Fig. 6. Damage distribution within the sample at the end of the test a) fibers failure, b) matrix failure

Fig .7. Comparison between experimental tensile test [0/90] 20 and finite element simulation using Hashin damage model