Marco Magliulo

Magliulo Marco

PhD Student

Nationality: French

Date of first affiliation: 04/01/2016


Research aim and objectives

3D Quasi-Continuum Model for large deformations including inter-tows contact


Fibrous materials have always been of interest for numerous technological applications, in particular during the last decades due to the development of a variety of fiber-based materials for the transportation industry. For economic and time-saving reasons, virtual testing of their mechanical responses is extensively used. However, their multi-scale character and the complex interactions between their constituents (yarns) make them difficult to model accurately and efficiently.
One approach to model such materials aims to represent segments of yarns by beam elements. Frictional contact between aforementioned elements also has to be included. By doing so, it is possible to capture complex localized phenomena (e.g. fracture, localized plasticity, relative fiber sliding) whilst requiring the identification of relatively few material parameters. However, the numerical models associated with these models are computationally prohibitive for real-scale simulations due in particular to the high number of degrees of freedom.
The Quasi-Continuum method (QC), initially designed for atomistic computations, is a method successfully adapted to material modeling (fibrous or not) that can overcome the issue of the computational burden. In this method, the displacement field is interpolated in the zones with low strain variations while the small-scale character in the areas of interest (so-called fully resolved regions) is kept. Consequently, the global error introduced remains acceptable, whilst achieving a substantial speedup in the computation time.
My Ph.D. research project, funded by the University of Luxembourg, is done under the supervision of Dr.Ir. Beex and Prof. Zilian. It aims to adapt the QC methods to 3D lattices including inter-fiber frictional contact. The resulting multiscale framework should incorporate small-scale mechanical phenomena in an efficient, yet explicit manner in application-scale simulations.

Summary of my CV :
— MSc. in Material Sciences, European School in Material Engineering, Nancy, France
— BSc. in Material Sciences, European School in Material Engineering, Nancy, France

Picture: (c) Michel Brumat