|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||Fatigue Crack Growth Characterization Using an Integrated Full Field Deformation and Cyclic Plasticity Method
||Konstantinos Baxevanakis, Jefferson Cuadra, Adrian Loghin, Antonios Kontsos
|On-Site Speaker (Planned)
The evolution of the displacement and strain fields around the crack tip is presented and analyzed herein for Nickel superalloy specimens under fatigue conditions. The displacement fields were measured using a Digital Image Correlation (DIC) system. The results revealed a linear trend of the opening displacement around the crack tip as function of cycles. The profile of the calculated strain field ahead of the crack tip allowed the quantification of the plastic zone size and corresponding plastic accumulation values at different fatigue life stages. The calculated DIC parameters were then utilized in a confined crack tip plasticity model, calibrated using bulk stress-strain measurements datasets on round-bar specimens. The developed constitutive model was used to simulate progressive damage on a compact tension specimen. The model was able to adequately capture the crack opening displacements in various stages of the specimen’s fatigue life providing a predictive tool for fatigue crack growth estimation.
||Planned: Publication Outside of TMS (Indicate publication title and publisher if known.)