5 papers
Resolving Structural Avalanches in Amorphous Carbon with Arclength Continuation
Fraser Birks, Ibrahim Ghanem, Lars Pastewka +2
Plastic deformation in amorphous solids is carried by localized shear transformations that self-organize into avalanches. In amorphous carbon modeled with a machine-learned interat…
Jacobi-accelerated FFT-based solver for smooth high-contrast data
Martin Ladecký, Ivana Pultarová, François Bignonnet +3
The computational efficiency and rapid convergence of fast Fourier transform (FFT)-based solvers render them a powerful numerical tool for periodic cell problems in multiscale mode…
Influence of tip materials on the friction force microscopy of epitaxial graphene on SiC(0001): comparison of diamond and silicon tips in experiments and atomistic simulations
Mohammad Zarshenas, Takuya Kuwahara, Bartosz Szczefanowicz +5
Friction force microscopy (FFM) with silicon tips on epitaxial graphene supported by SiC(0001) previously revealed a sharp increase in friction at a threshold normal force, linked…
Active learning for parameter-free multiscale modeling of boundary lubrication
Hannes Holey, Peter Gumbsch, Lars Pastewka
Lubricated friction is a multiscale problem where molecular processes dictate the macroscopic response of the system. Traditional lubrication models rely on semi-empirical constitu…
Fractal structure, depinning, and hysteresis of dislocations in high-entropy alloys
Hoa Thi Le, Wolfram G. Nöhring, Lars Pastewka
High-entropy alloys (HEAs) are complex alloys containing multiple elements in high concentrations. Plasticity in HEAs is carried by dislocations, but the random nature of their com…