Atomistic to continuum mechanics description of crystal defects with dislocation density fields: application to dislocations and grain boundaries

H Kharouji, L Dezerald, P Hirel, P Carrez… - International Journal of …, 2024‏ - Elsevier
The atomic structure of crystal defects such as dislocations, grain or phase boundaries,
control these defects' properties: their mobility, ability to cross-slip, or solute segregation …

Stress-induced amorphization triggers deformation in the lithospheric mantle

V Samae, P Cordier, S Demouchy, C Bollinger, J Gasc… - Nature, 2021‏ - nature.com
The mechanical properties of olivine-rich rocks are key to determining the mechanical
coupling between Earth's lithosphere and asthenosphere. In crystalline materials, the motion …

Disclinations provide the missing mechanism for deforming olivine-rich rocks in the mantle

P Cordier, S Demouchy, B Beausir, V Taupin, F Barou… - Nature, 2014‏ - nature.com
Mantle flow involves large strains of polymineral aggregates. The strongly anisotropic plastic
response of each individual grain in the aggregate results from the interactions between …

A multiscale model of grain boundary structure and energy: From atomistics to a continuum description

PRM Van Beers, VG Kouznetsova, MGD Geers… - Acta Materialia, 2015‏ - Elsevier
Grain boundaries play an important role in the mechanical and physical properties of
polycrystalline metals. While continuum macroscale simulations are appropriate for …

Cosserat-phase-field modeling of grain nucleation in plastically deformed single crystals

F Ghiglione, A Ask, K Ammar, B Appolaire… - Journal of the Mechanics …, 2024‏ - Elsevier
Thermomechanical processing of crystalline materials induces microstructural evolution
such as grain nucleation and growth. In the numerical simulation of these processes, grain …

Euromech 563 Cisterna di Latina 17–21 March 2014 Generalized continua and their applications to the design of composites and metamaterials: A review of …

L Placidi, I Giorgio, A Della Corte… - … and Mechanics of …, 2017‏ - journals.sagepub.com
In the present paper, a rational report on Euromech 563, Generalized continua and their
applications to the design of composites and metamaterials (Cisterna di Latina 17–21 March …

A cosserat crystal plasticity and phase field theory for grain boundary migration

A Ask, S Forest, B Appolaire, K Ammar… - Journal of the Mechanics …, 2018‏ - Elsevier
The microstructure evolution due to thermomechanical treatment of metals can largely be
described by viscoplastic deformation, nucleation and grain growth. These processes take …

Crystal plasticity simulation of strain aging phenomena in α-titanium at room temperature

A Marchenko, M Maziere, S Forest, JL Strudel - International Journal of …, 2016‏ - Elsevier
Strain aging phenomena are shown to affect the viscoplastic behavior of commercially pure
α-titanium at room temperature. A yield stress anomaly corresponding to static strain aging …

Inspection of free energy functions in gradient crystal plasticity

S Forest, N Guéninchault - Acta Mechanica Sinica, 2013‏ - Springer
The dislocation density tensor computed as the curl of plastic distortion is regarded as a new
constitutive variable in crystal plasticity. The dependence of the free energy function on the …

Density-based crystal plasticity: From the discrete to the continuum

PL Valdenaire, Y Le Bouar, B Appolaire, A Finel - Physical Review B, 2016‏ - APS
Because of the enormous range of time and space scales involved in dislocation dynamics,
plastic modeling at macroscale requires a continuous formulation. In this paper, we present …