Zobrazeno 1 - 10
of 443
pro vyhledávání: '"Ghaffari, H."'
Onset of permanent deformation in crystalline materials under a sharp indenter tip is accompanied by nucleation and propagation of defects. By measuring the spatio-temporal strain field nearthe indenter tip during indentation tests, we demonstrate th
Externí odkaz:
http://arxiv.org/abs/1806.04133
Autor:
Ghaffari, H. O., Griffith, W. A.
Many seemingly intractable systems can be reduced to a system of interacting spins. Here, we introduce a system of artificial acoustic spins which are manipulated with ultrasound excitations associated with micro-cracking sources in thin sheets of cr
Externí odkaz:
http://arxiv.org/abs/1610.00165
Characterizing the interaction between water and microscopic defects is one of the long-standing challenges in understanding a broad range of cracking processes. Different physical aspects of microscopic events, driven or influenced by water, have be
Externí odkaz:
http://arxiv.org/abs/1511.05132
The fast evolution of microstructure is key to understanding crackling phenomena. It has been proposed that formation of a nonlinear zone around a moving crack tip controls the crack tip velocity. Progress in understanding the physics of this critica
Externí odkaz:
http://arxiv.org/abs/1410.6951
Using 9-sets of different laboratory earthquake tests, we examined the nature of cracking under true triaxial stress conditions in the lithosphere . We found that 3D stress state can induce oblique nucleation of many fractures, forming final plane of
Externí odkaz:
http://arxiv.org/abs/1401.5812
We report some new applications of functional complex networks on acoustic emission waveforms from frictional interfaces. Our results show that laboratory faults undergo a sequence of generic phases as well as strengthening, weakening or fast-slip an
Externí odkaz:
http://arxiv.org/abs/1304.7733
Autor:
Ghaffari, H. O.
A model based on self-organizing nature of the surfaces is represented to capture the evolution of friction networks. Also, the curvatures of displacement fields are determined and critical curvature profiles are connected through links to form ridge
Externí odkaz:
http://arxiv.org/abs/1212.2580
Autor:
Ghaffari, H. O., Young, R. P.
We show that the mesoscopic and transport characteristics of networks follow the same trends for the same type of the shear ruptures in terms of rupture speed while also comparing the results of three different friction experiments.The classified fro
Externí odkaz:
http://arxiv.org/abs/1208.4753
Autor:
Ghaffari, H. O., Young, R. P.
We have developed different network approaches to complex patterns of frictional interfaces (contact areas developments). Here, we analyze the dynamics of static friction. We found, under the correlation measure, the fraction of triangles correlates
Externí odkaz:
http://arxiv.org/abs/1202.5198
Autor:
Ghaffari, H. O., Young, R. P.
The complex configurations of dynamic friction patterns-regarding real time contact areas- are transformed into appropriate networks. With this transformation of a system to network space, many properties can be inferred about the structure and dynam
Externí odkaz:
http://arxiv.org/abs/1201.3136