|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||Microstructural Small Flaw Fracture Mechanics for Improved Design Analysis
||Robert Tryon, Robert McDaniels, Animesh Dey
|On-Site Speaker (Planned)
VEXTEC is working with the Air Force Research Laboratory to develop probabilistic small flaw fracture mechanics (SFFM) methods for improved design analysis where the initial flaw size assumptions are outside the range of traditional fracture mechanics applicability. The overall technical approach uses multi-scale physics-based microstructural crack initiation and small crack growth models including specific models for physically small cracks. Three dimensional statistically representative models of the microstructure are employed. Computational models are calibrated to experimental observations of microstructural damage mechanism for beta annealed titanium alloys. Laboratory observations show that the local damage accumulation mechanisms vary with grain (lamellar colony) orientation. The computational model allows for the microstructure and damage mechanism to vary along the damage front and along the damage path. Monte Carlo methods are used to simulate the large volume of material of many specimens or components. The models are calibrated to laboratory experiments.
||Planned: Publication Outside of TMS (Indicate publication title and publisher if known.)