112 citations · 1.1k across the 27 of their papers we have counts for
26 papers
An FFT-based solver with general boundary conditions for stationary diffusion problems based on Chebyshev collocation
Juan M. Quecedo, Javier Segurado
An efficient and robust FFT-based solver is proposed for diffusion-type problems with general Neumann and Dirichlet boundary conditions, based on a Chebyshev collocation framework.…
A stochastic discrete slip approach to microplasticity: Application to submicron W pillars
Carlos J. Ruestes, Javier Segurado
A stochastic discrete slip approach is proposed to model plastic deformation in submicron domains. The model is applied to the study of submicron pillar () compression…
Efficiency and accuracy of GPU-parallelized Fourier spectral methods for solving phase-field models
A. D. Boccardo, M. Tong, S. B. Leen +2
Phase-field models are widely employed to simulate microstructure evolution during processes such as solidification or heat treatment. The resulting partial differential equations,…
Microstructure sensitive fatigue life prediction model for SLM fabricated Hastelloy-X
Chandrashekhar M. Pilgar, Ana Fernandez, Javier Segurado
A microstructure-sensitive fatigue life prediction framework based on CP-FFT is proposed to study SLM fabricated Hastelloy-X. The microstructure enters in the model through the sha…
An implicit FFT-based method for wave propagation in elastic heterogeneous media
R. Sancho, V. Rey de Pedraza, P. Lafourcade +2
An FFT-based algorithm is developed to simulate the propagation of elastic waves in heterogeneous -dimensional rectangular shape domains. The method allows one to prescribe the…
A generalized line tension model for precipitate strengthening in metallic alloys
R. Santos-Güemes, J. Segurado, J. LLorca
A generalized line tension model has been developed to estimate the critical resolved shear stress in precipitation hardened alloys. The model is based in previous line tension mod…
Adaptation and validation of FFT methods for homogenization of lattice based materials
S. Lucarini, L. Cobian, A. Voitus +1
An FFT framework which preserves a good numerical performance in the case of domains with large regions of empty space is proposed and analyzed for its application to lattice based…
An FFT-based approach for Bloch wave analysis: application to polycrystals
J. Segurado, R. A. Lebensohn
A method based on the Fast Fourier Transform is proposed to obtain the dispersion relation of acoustic waves in heterogeneous periodic media with arbitrary microstructures. The mic…
An FFT framework for simulating non-local ductile failure in heterogeneous materials
M. Magri, S. Lucarini, G. Lemoine +2
The simulation of fracture using continuum ductile damage models attains a pathological discretization dependence caused by strain localization, after loss of ellipticity of the pr…
A multiplicative finite strain crystal plasticity formulation based on additive elastic corrector rates: Theory and numerical implementation
Meijuan Zhang, K. Nguyen, Javier Segurado +1
The purpose of continuum plasticity models is to efficiently predict the behavior of structures beyond their elastic limits. The purpose of multiscale materials science models, amo…
Multiscale modelling of precipitation hardening in Al-Cu alloys: dislocation dynamics simulations and experimental validation
R. Santos-Güemes, B. Bellón, G. Esteban-Manzanares +3
The mechanisms of dislocation/precipitate interactions were analyzed in an Al-Cu alloy containing a homogeneous dispersion of precipitates by means of discrete dislocation dyn…
A coupled model of diffusional creep of polycrystalline solids based on climb of dislocations at grain boundaries
M. Magri, G. Lemoine, L. Adam +1
A continuum theory based on thermodynamics has been developed for modeling diffusional creep of polycrystalline solids. It consists of a coupled problem of vacancy diffusion and me…
Simulation of the Hall-Petch effect in FCC polycrystals by means of strain gradient crystal plasticity and FFT homogenization
S. Haouala, S. Lucarini, J. LLorca +1
The influence of grain size on the flow stress of various FCC polycrystals (Cu, Al, Ag and Ni) has been analyzed by means of computational homogenization of a representative volume…
Effect of slip transmission at grain boundaries in Al bicrystals
S. Haouala, R. Alizadeh, T. R. Bieler +2
The effect of slip transfer on the deformation mechanisms of Al bicrystals was explored using a rate-dependent dislocation-based crystal plasticity model. Three different types of…
Effect of Grain Orientation and Local Strains on Void Growth and Coalescence in Titanium
Marina Pushkareva, Federico Sket, Javier Segurado +3
Ductile fracture has been extensively studied in metals with weak mechanical anisotropy such as copper and aluminum. The fracture of more anisotropic metals, especially those with…
DBFFT: A displacement based FFT approach for non-linear homogenization of the mechanical behavior
Sergio Lucarini, Javier Segurado
Most of the FFT methods available for homogenization of the mechanical response use the strain/deformation gradient as unknown, imposing their compatibility using Green's functions…
Development of a thermo-mechanically coupled crystal plasticity modeling framework: application to polycrystalline homogenization
Jifeng Li, Ignacio Romero, Javier Segurado
Accurate predictions of thermo-mechanically coupled process in metals can lead to a reduction of cost and an increase of productivity in manufacturing processes such as forming. Fo…
An algorithm for stress and mixed control in Galerkin based FFT homogenization
S. Lucarini, J. Segurado
A new algorithm is proposed to impose a macroscopic stress or mixed stress/deformation gradient history in the context of non-linear Galerkin based FFT homogenization. The method p…
An atomistic investigation of the interaction of dislocations with Guinier-Preston zones in Al-Cu alloys
G. Esteban-Manzanares, E. Martínez, J. Segurado +2
The interaction between edge dislocations and Guinier-Preston zones in an Al-Cu alloy was analyzed by means of atomistic simulations. The different thermodynamic functions that det…
On the accuracy of spectral solvers for micromechanics based fatigue modeling
Sergio Lucarini, Javier Segurado
A framework based on FFT is proposed for micromechanical fatigue modeling of polycrystals as alternative to the Finite Element method (FEM). The variational FFT approach is used wi…
Discrete dislocation dynamics simulations of dislocation- precipitate interaction in Al-Cu alloys
R. Santos-Güemes, G. Esteban-Manzanares, I. Papadimitriou +3
The mechanisms of dislocation/precipitate interaction were studied by means of discrete dislocation dynamics within a multiscale approach. Simulations were carried out using the di…
Crystal plasticity simulation of the effect of grain size on the fatigue behavior of polycrystalline Inconel 718
A. Cruzado, S. Lucarini, J. LLorca +1
A microstructure-based model that accounts for the effect of grain size has been developed to study the effect of grain size on the fatigue life of Inconel 718 alloys. The fatigue…
An analysis of the influence of grain size on the strength of FCC polycrystals by means of computational homogenization
S. Haouala, J. Segurado, J. LLorca
The effect of grain size on the flow stress of FCC polycrystals is analyzed by means of a multiscale strategy based on computational homogenization of the polycrystal aggregate. Th…
Microstructure-based fatigue life model of metallic alloys with bilinear Coffin-Manson behavior
A. Cruzado, S. Lucarini, J. LLorca +1
A microstructure-based model is presented to predict the fatigue life of polycrystalline metallic alloys which present a bilinear Coffin-Manson relationship. The model is based in…