PSI - Issue 24

9

Lorenzo Bergonzi et al. / Structural Integrity Procedia 00 (2019) 000–000

Lorenzo Bergonzi et al. / Procedia Structural Integrity 24 (2019) 213–224 calculated at element centroid and normalized in respect to % for the different geometries. Results are reported in Figure 7. ASTM E8M Type V - round End of the fillet Middle plane 221

0.0 0.2 0.4 0.6 0.8 1.0 1.2 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 DIstance from specimen axis [mm] sxx Norm. sVMNorm.

0.0 0.2 0.4 0.6 0.8 1.0 1.2 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 DIstance from specimen axis [mm] sxx Norm. sVMNorm.

D = 1.21 ASTM E8M Type I - round

End of the fillet

Middle plane

0.0 0.2 0.4 0.6 0.8 1.0 1.2

0.0 0.2 0.4 0.6 0.8 1.0 1.2

sxx Norm. sVMNorm.

sxx Norm. sVMNorm.

D = 1.21 ASTM E8M Sheet Type 5.00 6.00 0.00

0.00

1.00

2.00

3.00

4.00

1.00

2.00

3.00

4.00

5.00

6.00

DIstance from specimen axis [mm]

DIstance from specimen axis [mm]

End of the fillet

Middle plane

0.0 0.2 0.4 0.6 0.8 1.0 1.2

0.0 0.2 0.4 0.6 0.8 1.0 1.2

sxx Norm. sVMNorm.

sXX_NORM sVM_NORM

D = 1.07 MaCh3D S-Size 6.00 0.00

1.00

2.00

3.00

4.00

5.00

6.00

0.00

1.00

2.00

3.00

4.00

5.00

DIstance from specimen axis [mm]

DIstance from specimen axis [mm]

End of the fillet

Middle plane

0.0 0.2 0.4 0.6 0.8 1.0 1.2 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 DIstance from specimen axis [mm] sxx Norm. sVMNorm.

0.0 0.2 0.4 0.6 0.8 1.0 1.2 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 DIstance from specimen axis [mm] sxx Norm. sVMNorm.

D = 1.01 Figure 7. Normalized stress along specimen cross section in correspondence of the end of the fillet and on the middle plane. As can be seen, MaCh3D mini specimen presents better stress uniformity in correspondence of the end of the fillet compared with ASTM round geometries. In the middle plane, all geometries show good accordance and low stress triaxiality level, as it would be expected.