Crack Paths 2006

in the 3D case whereas a better fit is obtained in the 2D case. It is also shown that the

crack grows along the interface once it has reached it. This corresponds to the actual

cracking behaviour. Note that, due to the softening behaviour, results are mesh

dependant (mesh size, element type, mesh orientation). Use of non-local technique [8]

together with a finer mesh could help improving crack prediction.

KCV2F

2D

V xx

0

2000MPa

KCV1F

3D

Fig. 5. Charpy tests under static loading: force–deflection curves for samples whose

notches are in the ferrite for specimen KCV1F.Dashed and Continuous lines

correspond respectively to the 2Dand 3DFE simulation. Maps show the predicted

crack path.

R E F E R E N C E S 2.

1. Pineau, A. (1992). in: Topics in Fracture and Fatigue, pp 197–234, A. Argon (Ed.),

3

Springer Verlag Inc., NewYork.

4.

Gurson, AL. (1977) J. Eng. Mat. Technol. 99, 2–15.

Isacsson, M., Narstrom, T. (1998) Mater. Sci. Eng. A 241, 169–178.

5.

Narstrom, T., Isacsson, M. (1999) Mater. Sci. Eng. A 271, 224–231.

Besson, J., Madi, Y. (2005) Mater. Sci. and Eng. A 397, 84–91.

6.

Tvergaard, V., Needleman, A. (1984) Analysis of cup-cone fracture in a round tensile

bar. Acta Metall 32, 157–169.

7.

Zhang, Z., Hauge, M., Thaulow, C., Ødegsård, J. (2002) Eng. Fract. Mech, 353–366.

8. Mediavilla, J., Peerlings, R.H.J. (2006) Eng. Fract. Mech. 73, 895–916.