Issue 39

S. K. Kudari et alii, Frattura ed Integrità Strutturale, 39 (2017) 216-225; DOI: 10.3221/IGF-ESIS.39.21

P W a B W 2 ( ) 

2 (2

)





(2)

where, P is applied load, W is width of the specimen, a is crack length. In these finite element calculations, the material behaviour has been considered to be linear elastic pertaining to an interstitial free (IF) steel possessing yield stress  y =155MPa, elastic modulus of 197 GPa, Poisson’s ratio=0.30.

Figure 2 : 3D CT Specimen mesh along with boundary conditions for a/W=0.50: a) B/W=0.1; b) B/W=1.

/  (  a) 1/ 2 along crack-front (x 3

Figure 3 : Effect of a/W on normalized stress intensity factor, K I

) for B =10mm.

R ESULTS AND DISCUSSION

Stress Intensity Factor (K I ) ) for specimens having various a/W is shown in Fig.3. The nature of variation of normalized stress intensity factor shown in Fig.3 is in good agreement with the similar results [7,19]. The A typical variation of normalized stress intensity factor (K I /  (  a) 1/2 ) and the distance along the crack front (specimen thickness direction, x 3

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