Numerical prediction of structural steel flat and slant fracture modes using phenomenological shear fracture model

Abstract

This paper presents the finite element (FE) predictions of structural steel flat and slant fracture modes using the phenomenological shear fracture model that employs the shear stress ratio instead of the lode angle parameter employed in literature for predicting structural steel ductile shear fracture. A992, 350W and G550 steel grades solid tension coupons (STCs) and perforated tension coupons (PTCs) flat fracture and S690 and S235 steel grades STCs and PTCs slant fracture are predicted. It is demonstrated that the phenomenological shear fracture model can be employed for predicting the displacement at fracture or fracture strain of structural steel that exhibits the flat or slant fracture mode. Thus, the phenomenological shear fracture model can be employed for predicting civil engineering structural steel complete fracture behaviors. Keywords: Ductile shear fracture, Ductile tension fracture, Flat fracture, Slant fracture, Structural steel