PSI - Issue 21

Tuncay Yalҫinkaya et al. / Procedia Structural Integrity 21 (2019) 46– 51

51

6

T. Yalc¸inkaya el al. / Structural Integrity Procedia 00 (2019) 000–000

Pore fraction vs Engineering Strain - Necking Simulation

Engineering Stress vs Strain - Necking Simulation

1

300

p

= 0.001

0

p

= 0.01

0

250

0.8

p 0 = 0.001 with material point deletion at p=0.1

200

0.6

150

0.4

Pore fraction

100

J2 plasticity Porous model, p 0

= 0.001

0.2

Engineering Stress [MPa] Porous model, p 0

= 0.01 Porous model with material point deletion at p=0.1, p 0

50

= 0.001

0

0

0

0.05

0.1

0.15

0.2

0.25

0.3

0

0.05

0.1

0.15

0.2

0.25

0.3

Engineering Strain

Engineering Strain

Fig. 5. Engineering stress-strain response of the necking specimen through both J2 and porous plasticity models at two di ff erent initial pore fractions (left), evolution of the porosity at the middle of the necking region (right)

experimental comparison. The simple representation of the model and the lack of material parameters o ff er a good potential for the use in ductile damage and fracture simulations.

Acknowledgements

Tuncay Yalc¸inkaya gratefully acknowledges the support by the Scientific and Technological Research Council of Turkey (TU¨ B ˙ITAK) under the 3501 Programme (Grant No. 117M106).

References

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