SEARCH · Engineering Papers
Results for “plastic crystals”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Effects of misorientation on single crystal plasticity by finite element methods
Not provided.
Crystal plasticity modeling of 3rd generation multi-phase AHSS with martensitic transformation
Abstract not provided
A coupled thermomechanical crystal plasticity model applied to Quenched and Partitioned steel
Abstract not provided
Simulating Knoop hardness anisotropy of aluminum and β-HMX with a crystal plasticity finite element model
Not Available
Machine learning-enabled identification of micromechanical stress and strain hotspots predicted via dislocation density-based crystal plasticity simulations
Not Available
Solid solution dependence of the deformation behavior in Mg–xZn (x = 0, 1, 2 wt%) alloys: In-situ neutron diffraction and crystal plasticity modeling
Not Available
Coupled chemo-mechanical modeling of point-defect diffusion in a crystal plasticity fast Fourier transform framework
Below the yield strength and at moderate-to-high homologous temperatures, the inelastic deformation of metals is mostly governed/rate-controlled by vacancy diffusion-mediated processes. As a function of grain size, stress, temperature and dislocation content, vacancies (or atoms) can adopt preferential diffusion paths across grain interiors, along grain boundaries, or towards and along dislocations, resulting in climb and self-climb. In the steady state and under constant load, grain boundary and grain bulk vacancy diffusion-mediated plasticity have been described in seminal works by Coble and by Nabarro and Herring, respectively. Yet, the interplay between all aforementioned potential diffusion pathways has not been comprehensively mapped. This work presents a thermodynamically-consistent full-field model integrated within a voxel-based elasto-viscoplastic fast Fourier transform framework, which considers the coupling between the diffusion-mediated plasticity mechanisms. In the proposed approach, the kinetics and kinematics of plastic deformation due to vacancy diffusion along grain boundaries and grain bulk, as well as the exchange between grain boundaries and bulk are described explicitly. A homogenization approach at the voxel level is further introduced to simultaneously consider bulk and grain boundary diffusion in a numerically efficient fashion. The new formulation predicts the expected strain rate dependencies and the scaling of the steady-state creep rate with respect to grain size, temperature, and stress. Finally, the model predicts the transition from grain bulk to grain boundary-dominated diffusion with reduction in grain size, a significant step towards capturing transitions in deformation behavior without any phenomenological or ad-hoc adjustments.
Initializing intragranular residual stresses within statistically equivalent microstructures for crystal plasticity simulations
Not Available
Predicting the high temperature deformation behavior of Haynes282 by a dislocation-density based crystal plasticity model
Not Available
Microstructure-Sensitive UQ for Materials Constitutive Models in Crystal Plasticity Finite Element Method.
Abstract not provided.
Crystal plasticity and micro-CT characterization of voids in plastic deformation of Al6061.
Abstract not provided.
Uncertainty Quantification of Constitutive Models in Crystal Plasticity Finite Element Method.
Abstract not provided.
High-throughput constitutive model calibration for crystal plasticity finite element model
Explore the source record for details and available documents.
The multifaceted nature of uncertainty in structure-property linkage with crystal plasticity finite element model
Explore the source record for details and available documents.
Comparison of crystal plasticity model predictions with DIC measured strain fields on Nickel clones
Explore the source record for details and available documents.
Crystal Plasticity Modeling of Microstructural Clones
Explore the source record for details and available documents.