Issue 39

S. K. Kudari et alii, Frattura ed Integrità Strutturale, 39 (2017) 216-225; DOI: 10.3221/IGF-ESIS.39.21 218 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. Figure 3 : Effect of a/W on normalized stress intensity factor, K I /  (  a) 1/ 2 along crack-front (x 3 ) for B =10mm. R ESULTS AND DISCUSSION Stress Intensity Factor (K I ) typical variation of normalized stress intensity factor (K I /  (  a) 1/2 ) and the distance along the crack front (specimen thickness direction, x 3 ) 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