Dynamic tensile fracture of iron: Molecular dynamics simulations and micromechanical model based on dislocation plasticity

VV Pogorelko, AE Mayer - International Journal of Plasticity, 2023 - Elsevier
Molecular dynamics (MD) shows a difference in the mechanisms of fracture of iron under
uniaxial and isotropic tension. Uniaxial tension leads to the formation of a complex …

Void growth based inter-granular ductile fracture in strain gradient polycrystalline plasticity

T Yalçinkaya, İT Tandoğan, İ Özdemir - International Journal of Plasticity, 2021 - Elsevier
The precipitation hardened, high strength aerospace alloys (eg Al 7000 alloy series) suffer
from loss of fracture toughness due to the heat treatment leading to intergranular ductile …

Deformation, dislocation evolution and the non-Schmid effect in body-centered-cubic single-and polycrystal tantalum

S Lee, H Cho, CA Bronkhorst, R Pokharel… - International Journal of …, 2023 - Elsevier
A physically-informed continuum crystal plasticity model is presented to elucidate
deformation mechanisms, dislocation evolution and the non-Schmid effect in body-centered …

Model of void nucleation on grain boundaries in dynamic failure of ductile metals incorporating interface incompatibility

H Sui, L Yu, W Liu, Y Liu, H Duan - Journal of the Mechanics and Physics of …, 2022 - Elsevier
Void nucleation on grain boundary (GB) has been regarded as an important mechanism of
damage initiation in ductile polycrystalline materials under dynamic loading. The high …

Integral-based non-local approach to ductile damage and mixed-mode fracture

AV Shutov, VS Klyuchantsev - Engineering Fracture Mechanics, 2023 - Elsevier
The present study focuses on the application of an integral-based approach for constructing
non-local ductile damage models. The incorporation of non-locality into the damage …

Subgrain geometrically necessary dislocation density mapping in spalled Ta in three dimensions

WA Witzen, MLP Echlin, MA Charpagne, TM Pollock… - Acta Materialia, 2023 - Elsevier
In this work, the intragranular distributions of the densities of geometrically necessary
dislocations (GNDs) generated in a polycrystalline tantalum (Ta) sample loaded in shock …

Multimodal 3D characterization of voids in shock-loaded tantalum: Implications for ductile spallation mechanisms

T Francis, PF Rottmann, AT Polonsky, MA Charpagne… - Acta Materialia, 2021 - Elsevier
Predicting the failure of crystalline materials at high strain rates requires knowledge of the
underlying failure mechanisms and their dependence on microstructure. In this study, a 3D …

Multi-scale spallation model for single-crystal ductile metals incorporating microscopic mechanism of void nucleation

H Sui, W Liu, Y Zhang, H Duan - Journal of the Mechanics and Physics of …, 2024 - Elsevier
Spall strength characterizes the tensile performance of materials under high strain rates.
However, theoretical prediction of the spall strength has long been a big challenge since it …

Large strain integral-based nonlocal simulation of ductile damage with application to mode-I fracture

AV Shutov, VS Klyuchantsev - International Journal of Plasticity, 2021 - Elsevier
The integral approach to nonlocal ductile damage is developed to enable numerically stable
and physically reasonable simulations of crack initiation and propagation in metals. A …

CEBoosting: Online sparse identification of dynamical systems with regime switching by causation entropy boosting

C Chen, N Chen, JL Wu - Chaos: An Interdisciplinary Journal of …, 2023 - pubs.aip.org
Regime switching is ubiquitous in many complex dynamical systems with multiscale
features, chaotic behavior, and extreme events. In this paper, a causation entropy boosting …