Multiscale modeling of the plasticity in an aluminum single crystal

Groh, Sébastien; Marin, Esteban; Horstemeyer, M.F.; Zbib, Hussein M.

doi:10.1016/j.ijplas.2008.11.003

Cited by 190 publications

(72 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Initial dislocation density corresponding to this configuration was 10 12 m −2 , to which a relaxation was applied under periodic boundary conditions. This value is comparable to the values used in other, similar, simulations [30,35] employing Frank-Read sources as the initial microstructural state. The cell dimensions were 6.00 µm by 6.00 µm by 6.00 µm in x-, y-, and z-directions respectively.…”

Section: Simulations At the Dislocation Dynamics Levelsupporting

confidence: 86%

“…This is because the mobility rule is mainly used for the displacement of dislocation segments during DD simulations. Such methodology was also adopted in the work of Groh et al [35] where they reported that this assumption did not effect the DD calculations.…”

Section: Simulations At the Atomic Scalementioning

confidence: 99%

“…Such attempts include either coupling Discrete Dislocation Dynamics (DDD) to the crystal plasticity framework [26][27][28][29], molecular dynamics to discrete dislocation dynamics [30,31] or molecular dynamics to finite element method [32][33][34]. An attempt to combine all the three length scales was made by Groh et al [35] and Chang et al [36]. Groh et al [35] combined MD, DDD and CP finite element analysis to predict the mechanical response of an aluminum single crystal deformed uniaxially under quasi-static compressive loading along the [421] crystallographic direction.…”

Section: Introductionmentioning

confidence: 99%

“…An attempt to combine all the three length scales was made by Groh et al [35] and Chang et al [36]. Groh et al [35] combined MD, DDD and CP finite element analysis to predict the mechanical response of an aluminum single crystal deformed uniaxially under quasi-static compressive loading along the [421] crystallographic direction. Chang et al [36] used atomistic, dislocation dynamics and crystal plasticity simulations to simulate indentation process in copper single crystals.…”

Section: Introductionmentioning

confidence: 99%

“…This model is based on the thermally activated theory for plastic flow [38]. The multiscale methodology adopted by Groh et al [35] employed the Orowan's equation based power law [39,40] for plastic flow and isotropic hardening rule of Kocks and Mecking [41]. In order to capture strain-rate history and temperature history effects on the flow stress in FCC metals, Balasubramanian and Anand [1] developed a new evolution equation for the slip resistances, taking into account the self as well as latent hardening of slip systems.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Multiscale modeling of plasticity in a copper single crystal deformed at high strain rates

Chandra

Samal

Chavan

et al. 2015

Plasticity and Mechanics of Defects

View full text Add to dashboard Cite

A hierarchical multiscale modeling approach is presented to predict the mechanical response of dynamically deformed (1100 s −1 −4500 s −1 ) copper single crystal in two different crystallographic orientations. An attempt has been made to bridge the gap between nano-, micro-and meso-scales. In view of this, Molecular Dynamics (MD) simulations at nanoscale are performed to quantify the drag coefficient for dislocations which has been exploited in Dislocation Dynamics (DD) regime at the microscale. Discrete dislocation dynamics simulations are then performed to calculate the hardening parameters required by the physics based Crystal Plasticity (CP) model at the mesoscale. The crystal plasticity model employed is based on thermally activated theory for plastic flow. Crystal plasticity simulations are performed to quantify the mechanical response of the copper single crystal in terms of stressstrain curves and shape changes under dynamic loading. The deformation response obtained from CP simulations is in good agreement with the experimental data.

show abstract

Section: Simulations At the Dislocation Dynamics Levelsupporting

confidence: 86%

Section: Simulations At the Atomic Scalementioning

confidence: 99%