Slow Rupture of Frictional Interfaces
Event details
| Date | 21.05.2012 |
| Hour | 14:00 › 15:00 |
| Speaker | Eran Bouchbinder, Weizmann Institute of Science, Israel |
| Location | |
| Category | Conferences - Seminars |
The failure of interfaces between bodies in frictional contact is central to a wide range of engineering, physical and geophysical systems, ranging from micro-electro-mechanical systems (MEMS) to earthquake faults. Failure is commonly viewed as an abrupt process in which large amount of energy is rapidly released by the propagation of fast, earthquake-like, rupture. Recent geophysical and laboratory observations indicated, however, that interfacial failure can in fact be mediated by slow rupture which is distinct from ordinary fast rupture.
Yet, the nature and properties of slow rupture are not fully understood. In this talk I will propose that slow rupture is an intrinsic and robust property of simple friction laws. It is associated with a new velocity scale c_min, intrinsically determined by the friction law, below which steady state rupture cannot propagate. Rupture is shown to occur in a continuum of states, spanning a wide range of velocities from c_min to elastic wave-speeds, with different properties for slow and common fast rupture. These results qualitatively agree with recent laboratory measurements and might provide a theoretical framework for understanding slow rupture phenomena along frictional interfaces.
Biography
Dr. Bouchbinder received his PhD in theoretical physics (with Prof. Itamar Procaccia) from the Weizmann Institute of Science in 2007. He then moved to the Racah institute of physics, Hebrew University of Jerusalem, as a postdoctoral fellow with Prof. Jay Fineberg. Since November 2009 he is a faculty member at the Weizmann Institute of Science.
His research focuses on the theory of non-equilibrium phenomena in condensed matter physics, materials science and solid mechanics. These include: dynamic fracture, sliding friction, dislocation-mediated plasticity, glass physics, amorphous plasticity, non-equilibrium thermodynamics and biomechanics.
Yet, the nature and properties of slow rupture are not fully understood. In this talk I will propose that slow rupture is an intrinsic and robust property of simple friction laws. It is associated with a new velocity scale c_min, intrinsically determined by the friction law, below which steady state rupture cannot propagate. Rupture is shown to occur in a continuum of states, spanning a wide range of velocities from c_min to elastic wave-speeds, with different properties for slow and common fast rupture. These results qualitatively agree with recent laboratory measurements and might provide a theoretical framework for understanding slow rupture phenomena along frictional interfaces.
Biography
Dr. Bouchbinder received his PhD in theoretical physics (with Prof. Itamar Procaccia) from the Weizmann Institute of Science in 2007. He then moved to the Racah institute of physics, Hebrew University of Jerusalem, as a postdoctoral fellow with Prof. Jay Fineberg. Since November 2009 he is a faculty member at the Weizmann Institute of Science.
His research focuses on the theory of non-equilibrium phenomena in condensed matter physics, materials science and solid mechanics. These include: dynamic fracture, sliding friction, dislocation-mediated plasticity, glass physics, amorphous plasticity, non-equilibrium thermodynamics and biomechanics.
Links
Practical information
- General public
- Free
Organizer
- Jean François Molinari
Contact
- Brigitte Seem, Cyprien Wolff