Damage and fracture mechanics

High-performance metallic, ceramic and concrete materials are needed for aerospace and national security applications. The development of next generation nuclear reactors brings accrued attention to the design and performance of concrete structures under impact or blast loading. Similarly, the drop of a kitchen plate on the floor and the impact of an asteroid on a planet induce complex fragmentation mechanisms that need to be understood to improve our safety or explain the evolution of the Earth.

Our research activities cover several damage mechanisms in both ductile and brittle materials and structures subjected to extreme loading conditions (formation of multiple necks, shear bands, voids, and micro cracks growth and coalescence). In these analytically intractable problems, we resort to large scale computing to have the most explicit and accurate representation of time evolution. The fundamental understanding we gain from our analysis can then be used to design more resistant materials and structures.

 

 

Selected Publications

F. Barras; R. Carpaij; P. H. Geubelle; J.-F. Molinari : Supershear bursts in the propagation of a tensile crack in linear elastic material; Physical Review E. 2018-12-07. DOI : 10.1103/PhysRevE.98.063002.
A. Ramos; C. Roux-Langlois; C. Dunant; M. Corrado; J. Molinari : HPC simulations of alkali-silica reaction-induced damage: Influence of alkali-silica gel properties; CEMENT AND CONCRETE RESEARCH. 2018. DOI : 10.1016/j.cemconres.2018.03.020.
J. Bleyer; J.-F. Molinari : Microbranching instability in phase-field modelling of dynamic brittle fracture; Applied Physics Letters. 2017. DOI : 10.1063/1.4980064.
F. Barras; P. H. Geubelle; J.-F. Molinari : Interplay between Process Zone and Material Heterogeneities for Dynamic Cracks; Physical Review Letters. 2017. DOI : 10.1103/PhysRevLett.119.144101.
O. Yilmaz; J. Bleyer; J.-F. Molinari : Influence of heterogeneities on crack propagation; International Journal of Fracture. 2017. DOI : 10.1007/s10704-017-0239-6.