My primary research interest is in modeling the deformation of polycrystalline solids via a crystal plasticity finite element framework to lend insight into the relationship between microstructural features, crystal-scale deformation modes, and macroscopic behavior. Modern computational frameworks allow for the inclusion of fine microstructural details in simulations of polycrystalline materials, which in turn allows for the investigation of the complex development of heterogeneous plasticity at the intragrain scale.
In addition to modeling the deformation of polycrystalline solids, I actively develop new computational frameworks to handle complex deformation modes such as discrete deformation twinning. This model, in particular, aims to better predict the complex stress fields due to the onset of twinning. This framework has the potential to handle the similar problem of transformation induced plasticity, as well.
I interface closely with experimentalists, utilizing data from a range of experimental techniques – including macroscopic testing, optical microscopy, electron backscatter diffraction (EBSD), scanning electron microscopy digital image correlation (SEMDIC), high energy X-ray diffraction (HEXRD), and high energy X-ray tomography (HEXRT) – to determine a material’s macroscopic response, characterize the microstructure, and observe trends concerning crystal-scale deformation. This data is used to generate samples for use in simulations, as well as to compare against the model’s prediction.
Click the images below to find detailed descriptions into my areas of interest.