Influence of Thickness on the Values of Stress Intensity Factor in Compact Tension Specimen

It is well known that value of fracture toughness depends on the thickness of studied specimen. This paper deals with an assessment of the influence of the thickness on the values of stress intensity factor measured at crack tip in the compact-tension specimen. For this a numerical model was assembled representing different specimen’s thicknesses and material characteristics. From this 3D numerical model, the SIF values were calculated using by direct extrapolation method