[SY-L1] Symposium L-1

[SY-L1] Exploring Crystal-plastic Constitutive Rules with the OOF Tool

Invited

^○Andrew Reid¹, Stephen Langer¹, Shahiryar Keshavarz^1,2 (1.NIST, United States of America, 2.Theiss Research, United States of America)

A focus of the US National Institute of Standards and Technology effort associated with the Materials Genome Initiative is the construction of software tools for exploring structure-property relationships. One of these is the OOF Object-oriented finite-element tool, which is an integrated materials-focused image segmentation, mesh construction, and modeling system, allowing interactive structure-property explorations on meshes modeling realistic microstructures. A crystal-plastic modeling capability has recently been added to the OOF finite-element tool, bringing together OOF's ability to easily create meshes corresponding to real microstructures, and the capability to quickly and easily explore a wide variety of constitutive rules derived from various dislocation activity mechanisms derived. This provides a length-scale bridge from continuum descriptions of dislocations in the bulk to representative volume elements relevant to particular classes of microstructures. Early results of this exploration will be presented. The promise of this effort is that, coupled with suitable reference experiments on small systems, high-fidelity continuum crystal-plastic constitituve rules can be identified, and then employed in larger-scale material models.