Jean-François Molinari

TL;DR: It is found that the total contact area rises linearly with the load at small loads and the mean pressure in the contact regions is independent of load and proportional to the root-mean-square slope of the surface.

TL;DR: This review summarizes recent advances in the area of tribology based on the outcome of a Lorentz Center workshop surveying various physical, chemical and mechanical phenomena across scales, and proposes some research directions.

TL;DR: In this paper, a finite element calculation of frictionless, non-adhesive, contact between a rigid plane and an clasto-plastic solid with a self-affine fractal surface was conducted within an explicit dynamic Lagrangian framework.

TL;DR: In this paper, the quasicontinuum method was used to understand the mechanical response at the nanoscale of grain boundaries (GBs) under simple shear, and the deformation of the boundaries operated by three modes depending on the GB equilibrium configuration: GB sliding by uncorrelated atomic shuffling, nucleation of partial dislocations from the interface to the grains, and GB migration.

TL;DR: In this paper, two brittle fracture problems are numerically simulated: the failure of a ceramic ring under centrifugal loading and crack branching in a PMMA strip, and Monte Carlo simulations revealed that for highly heterogeneous rings, the number of small fragments was large and that few large fragments were generated.