Consultation des offres

Financial support : CDE, 18 months + teaching assistant position at FAU
 

Location :           IRDL (UMR CNRS 6027)/ Université Bretagne-Sud,
                            Centre de recherche Christiaan Huyghens, 56100 Lorient - France                    

Florida Atlantic University (FAU)

Department of Ocean and Mechanical Engineering

777 Glades Road, EW 176

Boca Raton, FL 33431-0991 - USA

Duration : 3-4 years -From September or October 2022 to August-september 2025 (possibly to continue up to 2026).

Context:The work of the research team (PTR 5 of the IRDL Institute) focuses on the modeling of heterogeneous materials and structures. To take into account heterogeneities, microstructure scales into a nonlocal framework formulated from discrete models is introduced. An international collaboration has been initiated for the past ten years between Florida Atlantic University (FAU) and Université Bretagne-Sud (UBS). Prof. Isaac ELISHAKOFF (FAU), Dr. Vincent PICANDET and Prof. Noël CHALLAMEL (UBS) propose to co-supervise a PhD student on stability and vibrations of periodic microstructures and equivalent non-local continuous media. The PhD student will be co-supervised by both Prof. Isaac ELISHAKOFF (FAU) at FAU in Florida, USA, Dr. Vincent PICANDET (UBS)and Prof. Noël CHALLAMEL (UBS) in France.

Objectives: The research project focuses on the study of discrete systems using the nonlocal mechanics of continuous media. One-dimensional lattices, such as discrete strings, bars or beams, can be equivalently simulated by one-dimensional non-local models. The two or three-dimensional generalization of such continuum modelling is much more recent, and has mainly focused on the behavior of microstructured plates or even three-dimensional lattices. The non-local or gradient-type laws that emerge from continualization procedures of such lattices are used to analyze the stability and the vibration of these so-called microstructured systems. Geometric and material non-linearities can also be taken into account at the micro scale, thus generating non-local or gradient non-linear higher order laws at the macroscopic scale. Most results in this area are based on orthogonal lattices. It is planned to generalize such an approach to hexagonal lattices, for engineering applications especially in the field of nanotechnologies.

Expectations: This research has applications in all areas of engineering sciences concerned with some changes of scale, with applications in both physics and in engineering sciences such as mechanics or civil engineering. The accurate modelling of damage phenomena in large scale structures (reinforced concrete for example) needs to take into account the effects of microstructure, that may significantly affect scale effects phenomena. In the field of nanotechnology, the study of nanoscale structures requires the introduction of consistent structural models that include interatomic scale effects. More generally, a multi-scale structural analysis driven by the behavior of constituent materials at both the micro and the macro scale requires the formulation of specific laws that make the material and the structure interact through a non-local correspondence.

Candidature à envoyer par e-mail (et à déposer sur le site https://theses.doctorat-bretagneloire.fr/) avant le samedi 7 mai 2022 avec les documents suivants :

• Lettre de motivation
• CV
• Copies des titres / diplômes et relevés de notes
• Liste de publications (le cas échéant)
• Recommandations (ou contacts)

Contacts :

Prof. Noël CHALLAMEL

noel.challamel@univ-ubs.fr

Tel: +33 (0)2 97 88 05 45

Dr. Vincent PICANDET

Vincent.picandet@univ-ubs.fr

Tel : +33 (0)2 97 87 58 19