El-Numodis: a new tool to model dislocation and surface interactions

JAG Joa, L Dupuy, P Råback, M Fivel… - … and Simulation in …, 2023 - iopscience.iop.org
While surfaces are known to have a limited impact on the mechanical properties of
crystalline materials at the macroscopic scale, they play a key role at small-scale behaving …

Modeling the effect of dislocation density on the strength statistics in nanoindentation

JC Crone, LB Munday, JJ Ramsey… - … and Simulation in …, 2017 - iopscience.iop.org
High variability in material strength is observed when the characteristic length scale of the
specimen or stressed region approaches the mean dislocation spacing. However, few efforts …

A Multiscale Investigation of the Physical Origins of Tension--Compression Asymmetry in Crystals and their Implications for Cyclic Behavior

S Queyreau, B Devincre - ar** single crystals
M Rajaguru, SM Keralavarma - Modelling and Simulation in …, 2018 - iopscience.iop.org
Failure by creep is a design limiting issue for metallic materials used in several high
temperature applications. Current theoretical models of creep are phenomenological with …

Physical scaling in microstructures and avalanches of dislocation by Dislocation Dynamics simulations

M Aissaoui, C Kahloun, OU Salman… - arxiv preprint arxiv …, 2024 - arxiv.org
At the mesoscale, the avalanche-like plastic bursts are associated with statistical signatures,
whose parameters are not always well defined. In this work, we performed large scale and …

A unifying scaling for the Bauschinger effect in highly confined thin films: a discrete dislocation plasticity study

S Waheed, R Hao, A Bhowmik, DS Balint… - … and Simulation in …, 2017 - iopscience.iop.org
In this study, sequential sputter deposition, diffusion bonding and focused ion beam milling
are used to fabricate sapphire micropillars encapsulating a thin single crystal niobium film. A …

Computing forces on interface elements exerted by dislocations in an elastically anisotropic crystalline material

B Liu, A Arsenlis, S Aubry - Modelling and Simulation in Materials …, 2016 - iopscience.iop.org
Driven by the growing interest in numerical simulations of dislocation–interface interactions
in general crystalline materials with elastic anisotropy, we develop algorithms for the …

Analytical integration of the tractions induced by non-singular dislocations on an arbitrary shaped triangular quadratic element

S Queyreau, K Hoang, X Shi, S Aubry… - … and Simulation in …, 2020 - iopscience.iop.org
An analytical model is proposed to evaluate the nodal force induced by a segment of
dislocation upon an arbitrary shaped triangular element. This calculation is required in …

Dislocation dynamics modeling of the interaction of dislocations with Eshelby inclusions

S Aubry, S Queyreau, A Arsenlis - … of Solids at Micro‐and Nano …, 2019 - Wiley Online Library
Materials properties are strongly influenced by their microstructures at the mesoscale.
Although dislocations‐line defects present in crystalline materials, are key to control …

Aspects on numerical integration of dislocation surface traction fields for discrete dislocation dynamics FEM coupling: the case of emerging dislocations

T El-Achkar, D Weygand - Modelling and Simulation in Materials …, 2020 - iopscience.iop.org
In discrete dislocation dynamics frameworks for finite samples, the evaluation of surface
tractions caused by dislocations requires special attention to capture the contributions of …