Numerical Analysis of Inner and Exterior Crack Relative Position for Stress Intensity Factors

Abstract

Establishing a cylinder pressure vessel model is to set a semi-ellipse crack on the inwall and ektexine of the vessel respectively. By changing the included angle values, standing for the inner and exterior crack relative position transformation, to get the inner and exterior crack stress intensity factors changing rules based on the results from finite element software ANSYS Workbench. The result indicates that the stress intensity factor value of inner and exterior cracks is minimum when their circumferential angle is 0° and the stress intensity factor value of inner and exterior cracks is maximum when their circumferential angle is 10°. In total, stress intensity factors of inner crack is more sensitive to the crack relative position transformation and can be easier to be effected by inner and exterior crack interaction.