Publication
Crack front waves: A 3D dynamic response to a local perturbation of tensile and shear cracks
Publications associées (46)
Optimization of elastic wave propagation in a reconfigurable medium by genetic algorithms with adaptive mutation probability
Romain Christophe Rémy Fleury, Janez Rus
We introduce a reconfigurable medium for the manipulation of elastic propagation properties of Lamb waves. It is based on a shape memory polymer (SMP) with temperature-dependent Young's modulus. Waves are excited by a laser pulse and detected by a laser vi ...
IOP Publishing Ltd2023Formation of the cavity on a planar interface subjected to a perturbed shock wave
Naifu Peng, Ho Ling Li, Yue Yang
We report the mechanism and modeling for the formation of cavitylike structures on a planar interface subjected to a perturbed shock wave. The cavity is distinguished from bubbles and spikes formed in the standard Richtmyer-Meshkov instability (RMI). The t ...
AMER PHYSICAL SOC2023cRacklet: a spectral boundary integral method library for interfacial rupture simulation
Jean-François Molinari, Thibault Didier Roch, Fabian Barras
The study of dynamically propagating rupture along interfaces is of prime importance in various fields and system sizes, including tribology (nm to m), engineering (mm to m) and geophysics (m to km) (Armstrong-Hélouvry et al., 1994; Ben-Zion, 2008; Vanossi ...
2022Stress wave propagation through a 180° bend junction in a square cross-sectional bar
Jean-François Molinari, Antonio Joaquin Garcia Suarez, Ghatu Subhash
Longitudinal elastic stress wave propagation through a 180° bend junction connecting two square bars is analyzed using analytical and numerical approaches and validated against experiments. The aim is to identify conditions under which the one-dimensional ...
2022Transition from sub-Rayleigh anticrack to supershear crack propagation in snow avalanches
Johan Alexandre Philippe Gaume, Bertil Trottet, Grégoire Bobillier, Alec van Herwijnen
Avalanches can occur when a porous snow layer lies beneath a dense cohesive snow slab. Field experiments and simulations now reveal different crack-propagation regimes in slab avalanches, similar to rupture propagation following an earthquake. Snow slab av ...
NATURE PORTFOLIO2022Crack propagation speeds in weak snowpack layers
Johan Alexandre Philippe Gaume, Jürg Schweizer, Bertil Trottet, Grégoire Bobillier, Alec van Herwijnen
For the release of a slab avalanche, crack propagation within a weak snowpack layer below a cohesive snow slab is required. As crack speed measurements can give insight into underlying processes, we analysed three crack propagation events that occurred in ...
CAMBRIDGE UNIV PRESS2021Study on the Performances of AlScN based SAW/BAW Hybrid Resonators A Parametric Analysis of Acoustic Wave Resonators with Large Figure of Merit
Luis Guillermo Villanueva Torrijo, Soumya Yandrapalli, Guilain Lionel Germain Lang
In this study, we analyze a 3rd type of FBAR's fundamental mode by finite element method. We show the importance of the substrate's wave velocity and conductivity on the electromechanical coupling efficiency. Then we demonstrate that etching traditional SA ...
IEEE2021Micromechanical Modelling of Elastic Wave Velocity Variations for Intact Brittle Rocks
Until now, the micromechanical wing crack model of Ashby & Sammis 1990 describing the brittle field of rocks has only been used for failure predictions. However, it gives relevant information regarding the crack opening process, so this model is extended t ...
2021Fracture toughness of sandstone under dry, saturated and immerged conditions
Water-induced strength reduction is one of the most critical causes of rock engineering disasters. Understanding the influence of water on the fracture toughness of rocks is necessary for rock fracture mechanics and rock engineering applications such as mi ...
2020Sharp transition in modes of dynamic crack propagation in dry-snow slab avalanche
Dry-snow slab avalanche release can be separated in four distinct phases : (i) failure initiation in a weak snow layer, (ii) onset, (iii) dynamics of crack propagation in the weak layer and eventually (iv)slab release. While a lot has been done to study th ...
2020