Numerical Methods for a Crack Rate Propagation Model in a Ti-6Al4-V Smooth Specimen

The Titanium high strength-to-mass ratio Ti-6Al-4V alloy is one of the key materials in advanced engineering applications, especially when high resistance is required for critical, low-weight components. Based on a linear, plane stress, elastic FE model of a cracked smooth flat dogbone specimen, propagation models have been implemented to predict the crack propagation rates for smooth specimens, by using Paris, Walker and Kato-Deng-Inoue-Takatsu propagation formulae. The different outcomes from the forecasting numerical models were compared with experimental results, proposing modeling procedures for the numerical simulation of fatigue behavior of a Ti-6Al-4V alloy.