PSI - Issue 19

Alberto Campagnolo et al. / Procedia Structural Integrity 19 (2019) 617–626 A. Campagnolo/ Structural Integrity Procedia 00 (2019) 000 – 000

623 7

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

FE code: Ansys Element type: SOLID 187 (tetra 10) Loading: mode I

(a)

FE code: Ansys Element type: SOLID 187 (tetra 10) Loading: mode I

(b)

1.21 +10% -10%

1.05 +15% -15%

FE

FE

K *

K *

2α = 0° 2α = 90° 2α = 120°

2α = 135°

a/d≥ 3

a/d ≥ 1

1

3

5

7

9 11 13 15

1

3

5

7

9 11 13 15

a/d

a/d

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 1 3 5 7 9 11 13 15 17 19 21 K ** FE a/d 2α = 0° a/d≥ 1 1.63 +20% -20% FE code: Ansys Element type: SOLID 187 (tetra 10) Loading: mode II (c)

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 1 3 5 7 9 11 13 15 K *** FE a/d 2α = 120° 2α = 135° a/d≥ 3 1.70 +10% -10% FE code: Ansys Element type: SOLID 187 (tetra 10) Loading: mode III (e)

FE code: Ansys Element type: SOLID 187 (tetra 10) Loading: mode III

(d)

1.37 +15%

FE

K ***

-15%

2α = 0° 2α = 90°

a/d≥ 3

1

3

5

7

9 11 13 15

a/d

FE (Eq. 4a ) for (a) 2α = 0°, 90° and 120°, (b) 2α = 135°; (c) K **

Fig. 4. Calibration of PSM combined with 10-node tetrahedral elements: K *

FE (Eq.

4b ) for 2α = 0°; K ***

FE (Eq. 4c ) for (d) 2α = 0° and 90°, (e) 2α = 120° and 135°.