PSI - Issue 17

S. Mousa et al. / Procedia Structural Integrity 17 (2019) 284–291 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

288

5

surface of the specimen. In the future work, the authors will compared the behaviour of crack growth in FGM specimen with that grow in unidirectional glass fiber-polyester polymeric composite specimen with the same volume of fraction.

3



2.5

0 15 30 45

2

1.5

1

0.5

Applied Force, kN

0

0

0.05

0.1

0.15

0.2

0.25

Deflection,mmm

Fig. 4 Effect of pre-crack inclination angle,  , FGM specimen on load-deflection relation under 3PB test.

Crack growth

Crack growth

Delamination

 = 15 o  = 45 o Fig. 5. The failure shape of FGM specimen under 3PB by using XFEM.  = 30 o

4.2. Numerical results Figure 6 shows the effect of pre-crack inclination angle on the final failure shape of the FGM beam specimen under 3PB loading. The XFEM was used in this part to predict the crack path and the final failure. Results are suggesting an agreement between the numerical results in figure 6 and that gained in the expermintal results in figure 5.