Low Cycle Fatigue Life Prediction Using Unified Mechanics Theory in Ti-6Al-4V Alloys

Low Cycle Fatigue Life Prediction Using Unified Mechanics Theory in Ti-6Al-4V Alloys

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Fatigue in any material is a result of continuous irreversible degradation process.Traditionally, fatigue life is predicted by extrapolating experimentally curve fitted empirical models.In the current study, unified mechanics theory is used to predict life of Ti-6Al-4V under monotonic tensile, compressive and cyclic load lunchbag conditions.

The unified mechanics theory is used to derive a constitutive model for fatigue life prediction using a three-dimensional computational model.The proposed analytical and computational models have been used to predict the low cycle fatigue life of Ti-6Al-4V alloys.It is shown that the unified mechanics theory can be used to predict fatigue life baby toys of Ti-6Al-4V alloys by using simple predictive models that are based on fundamental equation of the material, which is based on thermodynamics associated with degradation of materials.