We have investigated the mean-field dynamics of an overdamped viscoelastic medium driven through quenched disorder. The model allows for the coexistence of pinned and sliding regions and can exhibit continuous elastic depinning or first-order hysteretic depinning. Numerical simulations indicate mean-field instabilities that correspond to macroscopic stick-slip events and lead to premature switching. The model describes the elastic and plastic dynamics of driven vortex arrays in superconductors and other extended disordered systems.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.85.1104 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Unsteady wetting of soft solids.
J Colloid Interface Sci
June 2024
School of Mechanical & Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639708, Singapore; School of Physical and Mathematical Sciences, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore. Electronic address:
Hypothesis: Spreading of liquids on soft solids often occurs intermittently, i.e., the liquid's wetting front switches between sticking and slipping.
View Article and Find Full Text PDFAsymmetric Damage Avalanche Shape in Quasibrittle Materials and Subavalanche (Aftershock) Clusters.
Phys Rev Lett
September 2020
University Grenoble Alpes, CNRS, ISTerre, 38000 Grenoble, France.
Crackling dynamics is characterized by a release of incoming energy through intermittent avalanches. The shape, i.e.
View Article and Find Full Text PDFCurrent-induced viscoelastic topological unwinding of metastable skyrmion strings.
Nat Commun
November 2017
RIKEN Center for Emergent Matter Science (CEMS), Wako, 351-0198, Japan.
Article Synopsis
- The magnetic skyrmion strings in MnSi form a lattice structure and can stretch through a significant thickness of the material (10-1000 μm).
- Upon applying strong pulsed currents (3-5 x 10 A/m), rather than just moving, these skyrmion strings undergo a process called topological unwinding.
- The study finds that the critical current density needed for this effect increases with shorter pulse widths, and simulations suggest that the unwinding is triggered by the depinning of already segmented skyrmion strings.
Self-spreading of the wetting ridge during stick-slip on a viscoelastic surface.
Soft Matter
November 2017
X-ray Imaging Center, Department of Materials Science and Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang 37673, South Korea.
Dynamic wetting behaviors on soft solids are important to interpret complex biological processes from cell-substrate interactions. Despite intensive research studies over the past half-century, the underlying mechanisms of spreading behaviors are not clearly understood. The most interesting feature of wetting on soft matter is the formation of a "wetting ridge", a surface deformation by a competition between elasticity and capillarity.
View Article and Find Full Text PDFDroplets move over viscoelastic substrates by surfing a ridge.
Nat Commun
August 2015
1] Physics of Fluids Group, Faculty of Science and Technology, Mesa+ Institute, University of Twente, 7500 AE Enschede, The Netherlands [2] Department of Applied Physics, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands.
Liquid drops on soft solids generate strong deformations below the contact line, resulting from a balance of capillary and elastic forces. The movement of these drops may cause strong, potentially singular dissipation in the soft solid. Here we show that a drop on a soft substrate moves by surfing a ridge: the initially flat solid surface is deformed into a sharp ridge whose orientation angle depends on the contact line velocity.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!