PSI - Issue 18

Alexey N. Fedorenko et al. / Procedia Structural Integrity 18 (2019) 432–442 A.N. Fedorenko, B.N. Fedulov, E. V. Lomakin / Structural Integrity Procedia 00 (2019) 000–000

436

5

Fig. 2. Damage evolution diagrams.

4. Numerical verification The experimental results form WWFE collected by Hinton et al (2002) were used for verification of model, proposed in previous section. Material names and properties selected for the analysis provided in Table 1. Developed failure modeling approach was implemented within Abaqus FEM suite by means of special user subroutines as discussed in details by Fedulov et al (2017). The comparison of predicted and experimental failure scatter of tubular specimens subjected combined loading show satisfactory agreement as demonstrated in Fig. 3 and Fig. 4.

Table 1. Material data used for numerical verification of proposed model from WWFE

G 12 (GPa)

X c (MPa) 1480

Y t (MPa)

Y c (MPa)

S 12 (MPa)

X t (MPa) 1950

E 11 (GPa)

E 22 (GPa)

Material

ν 12

ν 23 0.4

AS4 + 3501–6 epoxy Gevetex E-glass 21×K43 + LY556/HT907/DY063 epoxy

126

11

6.6

0.28

48

200

79

53.48

17.7

5.83

0.278

0.4

1140

570

35

114

72

Fig. 3. Biaxial failure envelope for [90°/± 30°/90°] E-glass/LY556 epoxy laminate under combined τxy and σx stresses