Zobrazeno 1 - 10
of 183
pro vyhledávání: '"Po, Giacomo"'
Autor:
Li, Yang, Lalani, Inam, Maron, Matthew, Hixon, William, Wang, Biao, Ghoniem, Nasr, Po, Giacomo
We carry out strain-controlled in situ compression experiments of micron-sized tungsten micropillars (W) in the temperature range 300-900K, together with simulations of three-dimensional discrete dislocation dynamics (DDD) on the same scale. Two dist
Externí odkaz:
http://arxiv.org/abs/2409.16987
Data-Driven Modeling of Dislocation Mobility from Atomistics using Physics-Informed Machine Learning
Autor:
Tian, Yifeng, Bagchi, Soumendu, Myhill, Liam, Po, Giacomo, Martinez, Enrique, Lin, Yen Ting, Mathew, Nithin, Perez, Danny
Dislocation mobility, which dictates the response of dislocations to an applied stress, is a fundamental property of crystalline materials that governs the evolution of plastic deformation. Traditional approaches for deriving mobility laws rely on ph
Externí odkaz:
http://arxiv.org/abs/2403.14015
In this paper, we investigate plasticity in irradiated FeCrAl nanopillars using discrete dislocation dynamics simulations (DDD), with comparisons to transmission electron microscopic (TEM) in situ tensile tests of ion and neutron irradiated commercia
Externí odkaz:
http://arxiv.org/abs/2301.01812
Autor:
Maron, Matthew, Li, Yang, Lalani, Inam, Baker, Kristopher, Flores, Benjamin Ramirez, Black, Thomas, Hollenbeck, James, Ghoniem, Nasr, Po, Giacomo
Publikováno v:
In International Journal of Plasticity June 2024 177
Publikováno v:
In Nuclear Materials and Energy June 2024 39
Publikováno v:
International Journal of Plasticity, 145, 2021, 103062
Order strengthening in nickel-based superalloys is associated with the extra stress required for dislocations to bypass the $\gamma'$ precipitates distributed in the $\gamma$ matrix. A rich variety of bypass mechanism has been identified, with variou
Externí odkaz:
http://arxiv.org/abs/2104.05906
A novel implementation of the dislocation flux boundary condition in discrete dislocation dynamics is presented. The continuity of the individual dislocation loops in a periodic representative crystal volume (RVE) is enforced across the boundary of t
Externí odkaz:
http://arxiv.org/abs/2102.11173
Continuum models of dislocation plasticity require constitutive closure assumptions, e.g., by relating details of the dislocation microstructure to energy densities. Currently, there is no systematic way for deriving or extracting such information fr
Externí odkaz:
http://arxiv.org/abs/2012.14815
A novel, concurrent multiscale approach to meso/macroscale plasticity is demonstrated. It utilizes a carefully designed coupling of a partial differential equation (pde) based theory of dislocation mediated crystal plasticity with time-averaged input
Externí odkaz:
http://arxiv.org/abs/2005.02498
Nanoindentation, a common technique for probing the mechanical properties of crystalline materials, exhibits both surface and bulk-dominated responses that are linked to the parent crystal's elasticity and plasticity. For FCC crystals, the nanoindent
Externí odkaz:
http://arxiv.org/abs/1910.07587