Stéphane Bordas
Duy Tan University
AlgorithmMathematical optimizationEngineeringMathematical analysisFinite element methodSmoothed finite element methodMaterials scienceExtended finite element methodGeometryIsogeometric analysisApplied mathematicsLinear elasticityMathematicsComputer scienceFracture (geology)Numerical analysisMechanicsFracture mechanicsBoundary element methodStructural engineering
561Publications
65H-index
12.7kCitations
Publications 545
Newest
#1Patricio Peralta (University of Chile)H-Index: 2
#2Rafael O. Ruiz (University of Chile)H-Index: 7
Last. Stéphane Bordas (Duy Tan University)H-Index: 65
view all 4 authors...
Abstract null null A framework that allows the use of well-known dynamic estimators to infer the electromechanical properties in Piezoelectric Energy Harvesters (PEHs) is presented here. The framework is based on Bayesian inference applied over experimental results obtained from Frequency Response Functions (FRFs). The posterior probability density function is approximated adopting the Transitional Markov Chain Monte Carlo algorithm. A similar approach has been developed recently to perform the ...
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#1Shaima M. Dsouza (Indian Institute of Technology Madras)H-Index: 1
#2Tittu Mathew Varghese (Indian Institute of Technology Madras)
Last. Stéphane Bordas (Cardiff University)H-Index: 65
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Abstract null null This paper presents a non-intrusive scaled boundary finite element method to consider multiple input uncertainties, viz., material and geometry. The types of geometric uncertainties considered include the shape and size of inclusions. The inclusions are implicitly defined, and a robust framework is presented to treat the interfaces, which does not require explicit generation of a conforming mesh or special enrichment techniques. A polynomial chaos expansion is used to represen...
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#1Aflah ElounegH-Index: 1
#1A. Elouneg (CNRS: Centre national de la recherche scientifique)
Last. Emmanuelle Jacquet (CNRS: Centre national de la recherche scientifique)H-Index: 3
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#1Arnaud Mazier (University of Luxembourg)H-Index: 1
Last. Stéphane Bordas (University of Luxembourg)H-Index: 65
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Abstract null null In breast surgical practice, drawing is part of the preoperative planning procedure and is essential for a successful operation. In this study, we design a pipeline to assist surgeons with patient-specific breast surgical drawings. We use a deformable torso model containing the surgical patterns to match any breast surface scan obtained in less than 1 minute with a depth camera (Structure Sensor). To be compatible with surgical timing, we build an articulated model through a s...
1 CitationsSource
#1Anas Obeidat (University of Luxembourg)H-Index: 5
Last. Andreas Zilian (University of Luxembourg)H-Index: 8
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Abstract A three-dimensional remeshed smoothed particle hydrodynamics method for the simulation of isotropic turbulence is used, the method is coupled with Brinkman penalisation technique for flow simulation inside the complex valve geometry. Simulations are carried out for three different pressure reserve quantities, to replicate the opening of the valve, two time based pressure inlet boundary condition functions were simulated along with an impulsively started scenario. A geometrical sensitivi...
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#1Stéphane UrcunH-Index: 1
#2Pierre-Yves RohanH-Index: 6
Last. Giuseppe Sciumè (University of Bordeaux)H-Index: 12
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Spheroids encapsulated within alginate capsules are emerging as suitable in vitro tools to investigate the impact of mechanical forces on tumor growth since the internal tumor pressure can be retrieved from the deformation of the capsule. Here we focus on the particular case of Cellular Capsule Technology (CCT). We show in this contribution that a modeling approach accounting for the triphasic nature of the spheroid (extracellular matrix, tumor cells and interstitial fluid) offers a new perspect...
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#1Jack Hale (University of Luxembourg)H-Index: 9
#2Elisa SchenoneH-Index: 2
Last. Stéphane Bordas (University of Luxembourg)H-Index: 65
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Abstract At every iteration or timestep of the online phase of some reduced-order modelling schemes for non-linear or time-dependent systems, large linear systems must be assembled and then projected onto a reduced order basis of small dimension. The projected small linear systems are cheap to solve, but assembly and projection become the dominant computational cost. In this paper we introduce a new hyper-reduction strategy called reduced assembly (RA) that drastically cuts these costs. RA consi...
4 CitationsSource
#1A. Alijani (IAU: Islamic Azad University)H-Index: 5
Last. Stéphane Bordas (NU: Northwestern University)H-Index: 65
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An innovative technique, called conversion, is introduced to model circumferential cracks in thin cylindrical shells. The semi-analytical finite element method is applied to investigate the modal deformation of the cylinder. An element including the crack is divided into three sub-elements with four nodes in which the stiffness matrix is enriched. The crack characteristics are included in the finite element method relations through conversion matrices and a rotational spring corresponding to the...
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#1Anja Leist (University of Luxembourg)H-Index: 9
#2Matthias Klee (University of Luxembourg)
Last. Sara WadeH-Index: 8
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The uptake of machine learning (ML) approaches in the social and health sciences has been rather slow, and research using ML for social and health research questions remains fragmented. This may be due to the separate development of research in the computational/data versus social and health sciences as well as a lack of accessible overviews and adequate training in ML techniques for non data science researchers. This paper provides a meta-mapping of research questions in the social and health s...
#1Paul HauseuxH-Index: 4
#2Alberto AmbrosettiH-Index: 17
Last. Alexandre TkatchenkoH-Index: 70
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Understanding static and dynamic phenomena in complex materials at different length scales requires reliably accounting for van der Waals (vdW) interactions, which stem from long-range electronic correlations. While the important role of many-body vdW interactions has been extensively documented when it comes to the stability of materials, much less is known about the coupling between vdW interactions and atomic forces. Here we analyze the Hessian force response matrix for a single and two vdW-c...