PSI - Issue 14

Sanjeev M Kavale et al. / Procedia Structural Integrity 14 (2019) 584–596 Sanjeev M. Kavale, Krishnaraja G Kodancha, Nagaraj Ekbote / Structural Integrity Procedia 00 (2018) 000–000

588

5

stress with variation of Poisson’s ratio for 2D specimen for both plane stress and plane strain conditions. This clearly demands the need for 3D analyses.

1000 (B)

1050 (A)

-15 -12 -9 -6 -3 0 3 6 9 12 15 600 650 700 750 800 850 900 950 SENB a/W=0.50 B=25.4mm  = 0.20  = 0.25  = 0.30  = 0.35  = 0.40  = 0.45

1000

950

1/2

1/2

900

 = 0.20  = 0.25  = 0.30  = 0.35  = 0.40  = 0.45

SENB a/W=0.50 B=3mm

850

800 K I in MPa(mm)

K I in MPa(mm)

750

-1.5 -1.0 -0.5 0.0 0.5 1.0 1.5

B in mm

B in mm

Fig. 3 Variation of K I in SENB specimen along the crack-front for various Poisson’s ratio and specimen thickness (A) 3mm and (B) 25.4mm

(B)

1100 (A)

1100

1050

1000

1000

1/2

900

1/2

950

 = 0.20  = 0.25  = 0.30  = 0.35  = 0.40  = 0.45

 = 0.20  = 0.25  = 0.30  = 0.35  = 0.40  = 0.45

800

900

CT a/W=0.50 B=25.4mm

CT a/W=0.50 B=3mm

850 K I in MPa(mm)

700 K I in MPa(mm)

800

600

750

-1.5 -1.0 -0.5 0.0 0.5 1.0 1.5

-15 -10

-5

0

5

10

15

B in mm

B in mm

Fig. 4 Variation of K I in CT specimen along the crack-front for various Poisson’s ratio and specimen thickness (A) 3mm and (B) 25.4mm

-8 -6 -4 -2 0 2 4 6 8 650 700 750 800 850 900 950 1000 1050 (B) SENB a/W=0.50 B=12.7mm K I in MPa(mm) 1/2 B in mm  = 0  = 0.20  = 0.25  = 0.30  = 0.35  = 0.40  = 0.45

1000 1050 1100 (A)

-8 -6 -4 -2 0 2 4 6 8 650 700 750 800 850 900 950 CT a/W=0.50 B=12.7mm  = 0  = 0.20  = 0.25  = 0.30  = 0.35  = 0.40  = 0.45

1/2

K I in MPa(mm)

B in mm

Fig. 5 Variation of K I along the crack-front for various Poisson’s ratio for a/W =0.50 and B/W =0.50 for (A) CT specimen and (B) SENB specimen