Finite Element Examination of Stress-Strain Fields Near Ductile Crack Tip

Abstract

We are considering a centre crack in ductile steel plate of finite dimensions. Modeling and analysis of the crack is performed in ANSYS. Non-linear stress-strain data of steel is used in the software. A suitable value of far field tensile stress (pressure) is chosen such that the applied stress intensity parameter is less than the fracture toughness value. Plastic stress-strain fields are obtained near the crack tip in EPFM. Desired values are noted. Areas of high stress and high strain are identified. Validation of void nucleation taking place ahead of crack tip and not exactly at the crack tip and coalescence of voids happening at the crack tip is confirmed with the results.  Plane strain case is considered. Plots between the distance of desired location from the crack tip and load line stresses and strains are drawn. The plots are in accordance with the expected ones.