Publications de David Simon Kammer

Learning Physics-Consistent Particle Interactions

Olga Fink, David Simon Kammer, Zhichao Han

Interacting particle systems play a key role in science and engineering. Access to the governing particle interaction law is fundamental for a complete understanding of such systems. However, the inherent system complexity keeps the particle interaction hi ...

Oxford University Press2023

Learning physics-consistent particle interactions

Olga Fink, David Simon Kammer

Interacting particle systems play a key role in science and engineering. Access to the governing particle interaction law is fundamental for a complete understanding of such systems. However, the inherent system complexity keeps the particle interaction hi ...

2022

Properties of the shear stress peak radiated ahead of rapidly accelerating rupture fronts that mediate frictional slip

Jean-François Molinari, Mathilde Edmée Lucette Radiguet de la Bastaie, David Simon Kammer, Daniel Pino Muñoz

We study rapidly accelerating rupture fronts at the onset of frictional motion by performing high-temporal-resolution measurements of both the real contact area and the strain fields surrounding the propagating rupture tip. We observe large-amplitude and l ...

National Academy of Sciences2016

Length Scale of interface heterogeneities selects propagation mechanism of frictional slip fronts

Jean-François Molinari, David Simon Kammer, Daniel Pino Muñoz

We present three-dimensional finite-element simulations showing the propagation of slip fronts at striped heterogeneous interfaces. The heterogeneous area consists of alternating stripes of weaker and stronger frictional properties, which is equivalent to ...

Elsevier2016

Linear Elastic Fracture Mechanics Predicts the Propagation Distance of Frictional Slip

Jean-François Molinari, Mathilde Edmée Lucette Radiguet de la Bastaie, David Simon Kammer

When a frictional interface is subject to a localized shear load, it is often (experimentally) observed that local slip events propagate until they arrest naturally before reaching the edge of the interface. We develop a theoretical model based on linear e ...

Springer/Plenum Publishers2015

The role of viscoelasticity on heterogeneous stress fields at frictional interfaces

Jean-François Molinari, Mathilde Edmée Lucette Radiguet de la Bastaie, David Simon Kammer

We investigate the evolution of heterogeneous stress states along frictional in- terfaces. Using finite-element simulations, we model the occurrence of precur- sory slip sequences on a deformable-deformable as well as a deformable-rigid interface between t ...

Elsevier2015

Slip Fronts at Frictional Interfaces : A Numerical and Theoretical Study

David Simon Kammer

Even though friction affects everyday life in many ways, it is still one of the biggest mysteries of physics. Friction is a truly multi-scale phenomenon with a large variety of processes acting at various length and time scales. In recent years, much atten ...

EPFL2014

A study of frictional contact in dynamic fracture along bimaterial interfaces

Jean-François Molinari, Fabian Barras, David Simon Kammer

We investigate numerically the dynamic inplane propagation of a centered crack along bimaterial interfaces using a spectral formulation of the elastodynamic boundary integral equations. Particular attention is given to the effect of contact zones at the su ...

Springer Verlag2014

The existence of a critical length scale in regularised friction

Jean-François Molinari, Guillaume Anciaux, David Simon Kammer, Vladislav Yastrebov

We study a regularisation of Coulomb's friction law on the propagation of local slip at an interface between a deformable and a rigid solid. This regularisation, which was proposed based on experimental observations, smooths the effect of a sudden jump in ...

Elsevier2014

Survival of Heterogeneous Stress Distributions Created by Precursory Slip at Frictional Interfaces

Jean-François Molinari, Philippe Gillet, Mathilde Edmée Lucette Radiguet de la Bastaie, David Simon Kammer

We study the dynamics of successive slip events at a frictional interface with finite-element simulations. Because of the viscous properties of the material, the stress concentrations created by the arrest of precursory slip are not erased by the propagati ...

American Physical Society2013