PSI - Issue 28

Saiaf Bin Rayhan et al. / Procedia Structural Integrity 28 (2020) 1892–1900 Author name / Structural Integrity Procedia 00 (2019) 000–000

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5.4. Out of plane shear modulus, G 23 In comparison with the experimental data, for both Carbon-Epoxy, Fig. 5 (A) and Polyethylene-Epoxy, Fig. 5 (B) case studies, Ansys slightly overestimates out of plane shear modulus (G 23 ) results. In the case of Carbon-Epoxy prediction, the difference between the experimental results never exceeds more than 5%. Nonetheless, an acceptable agreement with the experiment is also achieved for the case of Polyethylene-Epoxy where the maximum discrepancy is found to be 7% against all the calculated fiber volume fraction.

1,5 1,6 1,7 1,8 1,9 2 2,1

5,5

A.

B.

4,5

3,5

G 23 ,GPa

G 23 ,GPa

2,5

1,5

0

0 , 2

0 , 4

0 , 6

0 , 8

1

0

0 , 2

0 , 4

0 , 6

0 , 8

1

Fiber Volume Fraction, V f

Fiber Volume Fraction, V f

Exp. EAM M-T

Chamis Bridging

Exp.

Chamis

EAM S-C

Bridging

M-T

S-C

Comsol FE. Sq. Ansys FE. Sq.

Comsol FE. Dm. Ansys FE. Dm.

Comsol FE. Hex. Ansys FE. Hex.

Comsol FE. (Sq./Dm./Hex.)

Ansys FE. (Sq./Dm./Hex.)

Figure 5. A: Out of plane shear modulus (G 23 ), Carbon-Epoxy; B: Out of plane shear modulus (G 23 ), Polyethylene-Epoxy

5.5. In-plane Poisson’s ratio, υ 12 Even though the utilized literature data only comprise in-plane Poisson’s ratio (υ 12 ) for Carbon-Epoxy case without experimental outcomes, the predicted data of Ansys FE Material Designer is nearly identical with all the analytical models and Comsol FE results, Fig. 6 (A). Besides, the Polyethylene-Epoxy data was calculated by analytical means and compared with Material Designer data, Fig 6 (B). An excellent agreement was achieved further among the models.

0,365 0,37 0,375 0,38 0,385 0,39 0,395 In-plane Poisson's ratio, υ 12 0 , 2 0

0,37

A.

B.

0,27 In-plane Poisson's Ratio,υ 12 0,295 0,32 0,345 0 , 2 0

0 , 4

0 , 6

0 , 8

1

0 , 4

0 , 6

0 , 8

1

Fiber volume fraction, v f Chamis Model/Bridging Model Ansys FE (Sq./Dm./Hex.) M-T S-C

Fiber Volume Fraction, v f

Chamis/Bridging

M-T

S-C

Comsol FE. (Sq./Dm./Hex.)

Ansys FE. (Sq./Dm./Hex.)

Figure 6. A: In-plane Poisson’s ratio (υ 12 ), Carbon-Epoxy; B: In-plane Poisson’s ratio (υ 12 ), Polyethylene-Epoxy