|About this Abstract
||7th World Congress on Integrated Computational Materials Engineering (ICME 2023)
||A Phenomenological Model for the Relationship Between Fatigue Life and Mechanical Properties
||Emiel Amsterdam, Borit B. Zwerink
|On-Site Speaker (Planned)
||Borit B. Zwerink
We present a phenomenological model that accurately describes the influence of the initial discontinuity distribution, the applied stress range and the main mechanical properties, such as the ultimate tensile strength and the Young’s modulus, on the fatigue life of an alloy. The phenomenological model for fatigue life is constructed from a physics based fracture mechanics model that includes the effect that small cracks have on the fatigue crack growth rate. It is shown that the model is able to relate the fatigue life to i) the “effect of defect” for porosity in additively manufactured AlSi10Mg and Ti-6Al-4V, ii) the anisotropy in additively manufactured Inconel 718 and iii) the UTS of conventionally processed AA7075 with different heat treatments. The results allow for accurate screening of alloy composition and processing for the prediction of fatigue resistant alloys that can be used for optimized design of high performance engineering structures.