1217 Frontiers of Crystal Plasticity

Paul Dawson, Cornell University
Robert Carson, Cornell University
Over the past 30 years, the field of computational crystal plasticity has advanced such that keeping in touch with the rapid progression is no longer an easy task. The goal of this minisymposium is to provide a forum to present and discuss the current advancements in the field, covering instantiation methods, higher-order crystal plasticity methods, and deformation phase transformation methods, and more. Developments in experimental methods (e.g. 2D/3D EBSD, high energy x-ray diffraction) have provided rich data sets from which virtual polycrystals can be instantiated. Examples include using measured orientations directly on structured meshes or to create tessellated analogs, and the generation of polycrystals from morphological properties (e.g. measured distributions of grain size or grain shape). Talks related to this area will emphasize on how we can exploit these data sets to obtain more representative virtual samples and better validation of the crystal-based models. These experimental techniques - among others - have also led to the exploration of new models in attempts to correctly capture observed higher order effects. Finite dislocation mechanics methods, strain gradient methods, combined atomistic, MD, and crystal plasticity methods, and various dislocation-based methods are common frameworks for higher-order methods. Talks from this session will help explore not only the strengths and weaknesses from each method, but will also open the dialogue for ways in which we can combine different frameworks together. Finally, these new data are enabling researchers to better tackle long standing problem in the field, such as those related to deformation phase transformations. Advancements in how to tackle these deformation mechanisms will be examined in a series of talks. The frontiers of research presented in this minisymposium represent the culmination of work from various fields in the long standing goal of being able to accurately model crystalline solids.