Machine learning-based multi-objective optimization for efficient identification of crystal plasticity model parameters

K Veasna, Z Feng, Q Zhang, M Knezevic - Computer Methods in Applied …, 2023 - Elsevier
A set of constitutive model parameters along with crystallography governs the activation of
deformation mechanisms in crystal plasticity. The constitutive parameters are typically …

Experimental characterization and crystal plasticity modeling for predicting load reversals in AA6016-T4 and AA7021-T79

S Daroju, T Kuwabara, R Sharma, DT Fullwood… - International Journal of …, 2022 - Elsevier
The detailed contribution of microstructural-level phenomena, such as dislocation structure
development and annihilation, as well as inter-granular and intra-granular backstress fields …

Nonlinear optimization for compact representation of orientation distributions based on generalized spherical harmonics

RE Marki, M Knezevic - Journal of the Mechanics and Physics of Solids, 2024 - Elsevier
An orientation distribution is a necessary input in any crystal plasticity simulation. The
computational time involved in crystal plasticity simulations scales linearly with the number …

Mechanical response, twinning, and texture evolution of WE43 magnesium-rare earth alloy as a function of strain rate: Experiments and multi-level crystal plasticity …

WG Feather, S Ghorbanpour, DJ Savage… - International Journal of …, 2019 - Elsevier
This work adapts a recently developed multi-level constitutive model for polycrystalline
metals that deform by a combination of elasticity, crystallographic slip, and deformation …

Deep drawing simulations using the finite element method embedding a multi-level crystal plasticity constitutive law: experimental verification and sensitivity analysis

TJ Barrett, M Knezevic - Computer Methods in Applied Mechanics and …, 2019 - Elsevier
This paper presents experimental verification of a multi-level simulation framework aimed at
sheet metal forming analysis. Specifically, deep drawing of a cylindrical cup simulations from …

Field fluctuations viscoplastic self-consistent crystal plasticity: Applications to predicting texture evolution during deformation and recrystallization of cubic …

IA Riyad, M Knezevic - Acta Materialia, 2023 - Elsevier
Recent advances pertaining to modeling of grain fragmentation during deformation and
recrystallization of polycrystalline metals using viscoplastic self-consistent (VPSC) …

Crystal plasticity-based finite element simulations of load reversals and hat-shaped draw-bending for predicting the springback behavior of dual-phase steel sheets

M Knezevic - International Journal of Solids and Structures, 2024 - Elsevier
This work is concerned with predicting geometrical shape changes in sheet metal forming
using a multi-level simulation framework that considers the directionality of deformation …

Modeling of the thermo-mechanical response and texture evolution of WE43 Mg alloy in the dynamic recrystallization regime using a viscoplastic self-consistent …

M Zecevic, M Knezevic, B McWilliams… - International Journal of …, 2020 - Elsevier
This paper presents a microstructure sensitive model for predicting mechanical response
and texture evolution of metals in the dynamic recrystallization regime. A recently proposed …

Experimental characterization and crystal plasticity modeling of dual-phase steels subjected to strain path reversals

S Daroju, T Kuwabara, M Knezevic - Mechanics of Materials, 2022 - Elsevier
This paper is concerned with monotonic and load reversal deformation of four dual-phase
(DP) 590, 780, 980, 1180 and one martensitic (MS) 1700 steel sheets. While the monotonic …

Influence of specimen width on the elongation-to-fracture in cyclic-bending-under-tension of commercially pure titanium sheets

TMT Oishi, N Pitkin, N Miller, D Mensah… - International Journal of …, 2024 - Elsevier
In recent publications, we have shown that repeated bending and unbending during tension
can significantly increase the percent elongation-to-fracture (ETF) of metallic sheets. A …