讲座时间：2025年05月28日15:00
地点：创新港20号楼4095房间
报告人：Prof. F. MERAGHNI，Arts et Métiers Institute of Technology
邀请人：陈强
Title：An overview of recent developments in multiscale modelling of polymer composite materials using homogenization approaches and data driven modelling
Abstract：The M²ARTS research group at Arts et Métiers Institute of Technology led by Prof. Fodil Meraghni focuses on multi-scale modeling using mean and full field homogenization methods. Models formulation are based on scale transitions accounting for the material microstructures induced by the manufacturing process as well as damage and deformation mechanisms in heterogeneous media. In terms of experimental investigation, M²ARTS group promotes advanced multiscale damage characterization and detection combining several investigation techniques (bulk and UGW, DIC, SEM, micro computed tomography) towards performing in-situ and/or operando-analysis under multiaxial thermomechanical loading configuration. Material systems of interest include polymer composites, shape memory alloys including high-entropy alloys and architectured materials obtained by additive manufacturing.
The seminar will focus on two main aspects. The first deals with the micromechanical modeling using mean-field and/or periodic homogenization approaches aimed at predicting damage and nonlinear mechanisms/rheology of polymer composites. Some results dealing with the simulation of thermo-hygro-mechanical response of semi-crystalline polymer matrix composites reinforced with randomly oriented short fibers or twill woven reinforcements are presented in the case of oligocylic fatigue. The extension of scale transition modelling to non-local approaches will be briefly discussed, in particular the gradient enhancement formulation of the non-local viscoplasticity coupled to damage. A last example regarding the use of periodic homogenization for the topology optimization of triply periodic minimal surfaces (TPMS) will be presented.
The second part of the talk will be dedicated to present some applications of the Data-driven modeling and physically-informed simulation using model reduction methods and ML techniques for real-time prediction in mechanics of materials and structures. The first example deals with the use of multiscale modelling results to enrich a "Data-Driven Modelling" approach. The multi-parametric approach will be illustrated by a real-time prediction of the elastic and then non-linear response accounting for thermoechanical couple of woven-reinforced composites as well as recycled composites with different reinforcement architectures, taking into account several microstructural parameters (architecture, geometric parameters, material parameters, ...) or loading conditions in terms of strain rate or paths.
Short Bio：
Prof. Fodil Meraghniis Distinguished Professor of Solids Mechanics at Arts et Métiers Institute of Technology, and he was previously Adjunct-Professor at Georgia Tech - George W. Woodruff School of Mechanical Engineering (2010-2013).
He is the head of the “Composites and Smart Materials Research Group” (M²ARTS) at LEM3-UMR CNRS 7239 and, since January 2019, he is Dean of Graduate and Ph.D. Programs at Arts et Métiers Institute of Technology (8 campuses).
He received his engineering degree in 1989 from the Ecole Nationale Polytechnique (Major in structural computation) and his Master of Science in Applied Mechanics from the University of Technology of Compiègne (UTC – June, 1990). In May 1994, he obtained his Doctorate in Mechanics of Composites from the University of Technology of Compiègne (UTC) with the highest grade. In 2002, Dr. Meraghni obtained the professorship qualification (Habilitation à Diriger des Recherches, HDR) from the UTC.
As Principal Investigator (PI), Prof. Meraghni and his group are involved in several research programs in collaboration with French industry or funded by the French Agency of Research (ANR) and others funding agencies such as FUI-DGSIS (BPI), PIA France 2030 and the Carnot Institute (ARTS). Since 2012, he is in charge of the scientific coordination of the Open Lab “Materials and Processes” a joint lab with Stellantis (Peugeot-Citroën Group). In this context, he has been awarded the Distinguished Award for the Excellence of the Academic Partnership with Stellantis. Prof. Fodil Meraghni has several strong international scientific partnerships. He has been invited as Visiting Professor in Germany (DLR Braunschweig, Fraunhofer Institute LBF – Darmstadt, TU Dortmund), in Belgium (Univ. Ghent), in Canada (Ryerson Univ.), in China (BUAA) and in USA (Texas A&M University, Georgia Tech).
Prof. Meraghni has co-authored 155 peer-reviewed papers published in international journals and two books:
§Thermomechanical Behavior of Dissipative Composite Materials. Ed. ISTE- Elsevier (296 pages, 2018).
§Multiscale Modeling Approaches for Composites. Edition Elsevier. (345 pages, 2022).
He has supervised/co-supervised 35 Ph.D. students, of whom 32 were defended and 10 postdocs. His research activities are currently focused on the following topics:
§Micromechanical modeling using mean-field and/or full-field homogenization approaches to predict damage and nonlinear mechanisms/rheology in polymer-based composites and shape memory alloys.
§Thermomechanical Analysis of High Entropy and High Temperature Shape Memory Alloys (HE&HT-SMAs)
§Data-driven modeling and physically-informed simulation using model reduction methods and ML techniques for real-time prediction and generative design in mechanics of materials and structures.
