Publications

Mechanics of materials

Deformation mode in 3-point flexure on pantographic block

Pantographic blocks are metamaterials made of a finite number of parallel pantographic sheets interconnected by cylindrical pivots. In this paper, a pantographic block subjected to 3-point flexure, where the prescribed displacements are parallel to…

Alessandro Ciallella, Gabriele La Valle, Antoine Vintache, Benjamin Smaniotto, François Hild

International Journal of Solids and Structures - 2023

Electromagnetism

Influence of biaxial stress on magnetostriction—Experiments and modeling

The paper deals with the influence of biaxial stress on the magnetic and magnetostriction behavior of a low carbon steel used for structural pieces in the car industry. Material, specimen, measurement setup and protocol are presented. Anhysteretic…

Olivier Hubert, Z. Maazaz, J. Taurines, R. Crepinge, F. van den Berg, C. Celada-Casero

Journal of Magnetism and Magnetic Materials - 2023

Structural mechanics

A mixed stress-strain driven computational homogenization of spiral strands

Spiral strands subjected to tensile force and bending loading display a nonlinear dissipative behavior due to frictional interactions between their elementary wires. This study aims to provide an efficient method, based on a computational…

Mohammad Ali Saadat, Damien Durville

Computers & Structures - 2023

Mechanics of materials

Boundary condition effect on the evaluation of stress triaxiality fields

A general framework is presented for evaluating stress triaxiality fields using five different configurations of Dirichlet boundary conditions. The latter ones were measured via stereocorrelation for a simple shear test on a thin sample where…

Andrija Zaplatić, Ana Vrgoč, Zvonimir Tomičević, François Hild

International Journal of Mechanical Sciences - 2023

Mechanics of materials

Hierarchically guided in situ nanolaminography for the visualisation of damage nucleation in alloy sheets

Hierarchical guidance is developed for three-dimensional (3D) nanoscale X-ray imaging, enabling identification, refinement, and tracking of regions of interest (ROIs) within specimens considerably exceeding the field of view. This opens up new…

Mathias Hurst, Lukas Helfen, Thilo Morgeneyer, Heikki Suhonen, Ante Buljac, François Hild, Jussi-Petteri Suuronen, Tilo Baumbach, Daniel Hänschke

Scientific Reports - 2023

Bioengineering

Thermal and Postural Effects on Fluid Mixing and Irrigation Patterns for Intraventricular Hemorrhage Treatment

Intraventricular hemorrhage is characterized by blood leaking into the cerebral ventricles and mixing with cerebrospinal fluid. A standard treatment method involves inserting a passive drainage catheter, known as an external ventricular drain (EVD),…

Coskun Bilgi, Faisal Amlani, Heng Wei, Nick Rizzi, Niema M Pahlevan

Annals of Biomedical Engineering - 2023

Representation Theory

Rationality of normal forms of isotropy strata of a representation of a compact Lie group

In this article we study the isotropy stratification of a linear representation $V$ of a compact Lie group $G$. We prove that the closed isotropy strata are real algebraic manifolds and that for each isotropy subgroup $H$, every rational invariant…

Perla Azzi, Rodrigue Desmorat, Julien Grivaux, Boris Kolev

Engineering Sciences

Automated conformal mesh generation chain for woven composites based on CT-scan images with low contrasts

A novel approach to generate conformal meshes of woven composites at the mesoscopic scale from low-contrast CT-scan images with reconstruction artifacts is presented. The segmentation of the CT-scans relies on texture analysis of the tomography to…

Guillaume Fourrier, Alain Rassineux, François-Henri Leroy, Martin Hirsekorn, Christian Fagiano, Emmanuel Baranger

Composite Structures - 2023

Materials

The analysis of internal stresses on a welded joint in Grade 91 steel under creep test loading: Synchrotron X-ray diffraction measurements and modelling

The analysis and understanding of creep damage of Grade 91 steel welded joints is an important topic in the energy industry. Creep tests on welded joints were carried out at 600 • C, 100 MPa and then interrupted at 0%, 10%, 30%, 50%, 80% of the…

Solenne Collomb, Xiaolei Chen, Jean-Philippe Tinnes, Thomas Schenk, Olivier Ferry, Svetlana Tsareva, Abdelkrim Redjaïmia, Alain Jacques

Materials Science and Engineering: A - 2023

Material chemistry

A simple and efficient process for the synthesis of 2D carbon nitrides and related materials

This manuscript describes a new process for the synthesis of very high quality 2D Covalent Organic Frameworks (COFs), such a C2N and CN carbon nitrides. The structure/quality of these materials is demonstrated by extensive cross-characterisations at…

Cora Moreira da Silva, Maxime Vallet, Clement Semion, Thomas Blin, Romuald Saint Martin, Jocelyne Leroy, Diana Dragoe, François Brisset, Cynthia Gilet, Régis Guillot,, Vincent Huc