Plastic zone size at notch tip in mode I fracture using the modified Irwin’s model and volumetric approach

At crack tip the stress distribution has singularities (i.e intensity is infinite) which physically impossible. Irwin realised that stresses at are finite and subsequently introduced Stress Intensify Factor(SIF). This factor used to determine this plastic zone size. The a special case of notch. Around notch, fracture needs volume develop according volumetric approach. characterised by distance effective Xeff, σeff KρI . In paper new proposed formula called “Modified Irwin’s Model” based on model can be will verified using numerical element simulation validated Von-Mises Tresca Criteria. Modified Model an alternative way estimate elaboration from zone.