|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||Nondestructive Evaluation as a Link between Fatigue Diagnostics and Prognostics
||Brian J Wisner, Ryan M Whitmore, Konstantinos Baxevanakis, Antonios Kontsos
|On-Site Speaker (Planned)
To link diagnosis to prognosis of fatigue behavior of materials, a multiphysics nondestructive evaluation approach is presented. Specifically, Acoustic Emission and Digital Image Correlation were combined so that real time acquisition of nondestructive data related to microstructure-level damage can be fed into computational mechanics models. To achieve this goal, Acoustic Emission data were combined with Outlier Analysis to define damage laws by identifying the least amount of features that contained the most significant information about the behavior and failure of the tested materials. These data-driven damage laws were defined as a function of measured strain, which was computed by full field deformation maps. Once the damage law was defined, it was fed into computational finite elements models that include both plasticity and damage considerations. This model was then used in computational problems as the constitutive material law that takes into account progressive damage defined by multiphysics nondestructive data.
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