Publications related to Coupling the thermal and mechanical fields to metallurgical evolutions within a finite element description of a forming process

Finite-element preconditioning of G-NI spectral methods

Several old and new finite-element preconditioners for nodal-based spectral discretizations of −laplace(u) = f in the domain

\Omega = (-1, 1)^d

(d = 2 or 3), with Dirichlet or Neumann boundary conditions, are considered and compared in terms of bothcondi ...

2009

Finite element model of primary recrystallization in polycrystalline aggregates using a level set framework

Roland Logé

The paper describes a robust finite element model of interface motion in media with multiple domains and junctions, as is the case in polycrystalline materials. The adopted level set framework describes each domain (grain) with a single level set function, ...

2009

Prediction of tantalum microstructure evolution during thermomechanical treatments using FEM calculations with a dislocation density based constitutive law

Roland Logé

In this paper, the behaviour of the tantalum subjected to a complex range of thermomechanical solicitations is studied and modelled. The objective of this work is the prediction of microstructure evolution of a tantalum part that is cold flow-formed, then ...

Hanrimwon Publishing Co.2008

Thermo-plasticity of fine-grained soils at various saturation states

Bertrand François

Soil is a particulate material that may undergo irreversible strain as the relative positions of the constituent particles change. That irreversible behaviour may be induced not only by an external stress variation but also by temperature or suction change ...

EPFL2008

Simulation of Thermal stresses in anode-supported solid oxide fuel cell stacks

Daniel Favrat, Jan Van Herle, Zacharie Wuillemin, Arata Nakajo

Structural stability issues in planar solid oxide fuel cells (SOFC) arise from the mismatch between the coefficients of thermal expansion (CTE) of the components. The stress state at operating temperature is the superposition of several contributions, whic ...

2008

Simulation of thermal stresses in anode-supported solid oxide fuel cell stacks

Daniel Favrat, Jan Van Herle, Arata Nakajo

Structural stability issues in planar solid oxide fuel cells (SOFC) arise from the mismatch between the coefficients of thermal expansion (CTE) of the components. The stress state at operating temperature is the superposition of several contributions, whic ...

2008

Constitutive behavior and fracture properties of tempered martensitic steels for nuclear applications

Raul Alejandro Bonadé

In this study, the tensile and fracture properties and the microstructure of the reduced-activation tempered martensitic steel Eurofer97 have been investigated. This technical alloy is a 9%Cr steel developed within the European fusion material research pro ...

EPFL2006

Assessment of irradiation-hardening on Eurofer97' and Zircaloy 2 with punch tests and finite-element modeling

Philippe Spätig, Emiliano Campitelli

We present an assessment of the mechanical constitutive behavior after irradiation for a tempered martensitic steel, Eurofer97', and for Zircaloy by means of small-ball punch tests. For that purpose we use a finite-element model of the punch test device. W ...

2005

Identification par recalage modal et fréquentiel des propriétés constitutives de coques en matériaux composites

Joël Cugnoni

Fibre-reinforced composites are being increasingly used as alternatives for conventional materials primarily because of their high strength, specific stiffness, light weight and adjustable properties. However, before using this type of material with confid ...

EPFL2005

Deformation behaviour and microstructure of nanocrystalline electrodeposited and high pressure torsioned nickel

Philippe Spätig, Robin Schäublin, Florian Dalla Torre

Microstructural analysis and mechanical testing have been performed on two types of nanocrystalline (NC) Ni samples and compared to coarse-grained (CG) Ni. The NC electrodeposited (ED) Ni is characterized by a mean grain size of 21 nm, a narrow grain size ...

2005

Coupling the thermal and mechanical fields to metallurgical evolutions within a finite element description of a forming process

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Finite-element preconditioning of G-NI spectral methods

Finite element model of primary recrystallization in polycrystalline aggregates using a level set framework

Prediction of tantalum microstructure evolution during thermomechanical treatments using FEM calculations with a dislocation density based constitutive law

Thermo-plasticity of fine-grained soils at various saturation states

Simulation of Thermal stresses in anode-supported solid oxide fuel cell stacks

Simulation of thermal stresses in anode-supported solid oxide fuel cell stacks

Constitutive behavior and fracture properties of tempered martensitic steels for nuclear applications

Assessment of irradiation-hardening on Eurofer97' and Zircaloy 2 with punch tests and finite-element modeling

Identification par recalage modal et fréquentiel des propriétés constitutives de coques en matériaux composites

Deformation behaviour and microstructure of nanocrystalline electrodeposited and high pressure torsioned nickel

Finite element model of primary recrystallization in polycrystalline aggregates using a level set framework

Simulation of thermal stresses in anode-supported solid oxide fuel cell stacks

Thermo-plasticity of fine-grained soils at various saturation states

Assessment of irradiation-hardening on Eurofer97' and Zircaloy 2 with punch tests and finite-element modeling

Prediction of tantalum microstructure evolution during thermomechanical treatments using FEM calculations with a dislocation density based constitutive law

Deformation behaviour and microstructure of nanocrystalline electrodeposited and high pressure torsioned nickel

Simulation of Thermal stresses in anode-supported solid oxide fuel cell stacks

Identification par recalage modal et fréquentiel des propriétés constitutives de coques en matériaux composites

Finite-element preconditioning of G-NI spectral methods

Constitutive behavior and fracture properties of tempered martensitic steels for nuclear applications