Crystal plasticity (Multi-scale)
Material Point Models
Physics based constitutive modeling
ex. Temperature, strain-rate, and crystal orientation dependence of single crystal aluminum
Finite Element Models (User-Defined Subroutines)
Single crystal finite element model
ex. Goss compression FCC single crystal a. before deformation, b. after deformation
Polycrystal finite element model
ex. Aluminum sample with large grains –Each color represents a grain.
ex. Polycrystal RVE of DP600 steel for a metal forming application
Modeling Additive Manufacturing Processes
Powder bed fusion process
ex. Thermal simulation of powder bed fusion process for IN718 with user-subroutines: Temperature and states (powder/liquid/solid).
Directed Energy Deposition Process
ex. Thermal simulation of directed energy deposition process for IN718 with user-subroutines: Temperature distribution.
Single crystal micro machining model
Simulation of turning process for FCC single crystals
ex. Cutting force fluctuations for different crystallographic turning zone axes a. <100>, b. <110>, c. <111>, d. zone axis.
Residual stress analysis
Hole drilling method (experimental)
Available system: Vishay RS200 to measure residual stresses using hole drilling method according to the ASTM Standard E837.
High Energy X-ray Diffraction (at Cornell University – with Prof. P.R. Dawson)
ex. Two scale analysis methodology to find the macro scale stress distributions from lattice strain measurements
Geometrically Necessary Dislocation calculation from EBSD maps
ex. Application to explain indentation size effect
Micro scale experiments
ex. Various micro scale samples prepared by Focused Ion Beam (FIB) milling method: Beams with round cross-section, cantilever beam during manufacturing, Bauschinger test sample and its EBSD map (from left to right) at Max Planck Institute for Iron Research with Prof. D. Raabe.