Reflection and exclusion of shear zones in inhomogeneous granular materials

被引：7

作者：

Borzsonyi, Tamas ^{[1
]}

Unger, Tamas ^{[2
]}

Szabo, Balazs ^{[1
]}

Wegner, Sandra ^{[3
]}

Angenstein, Frank ^{[4
]}

Stannarius, Ralf ^{[3
]}

机构：

[1] Res Inst Solid State Phys & Opt, H-1525 Budapest, Hungary

[2] Budapest Univ Technol & Econ, HAS BUTE Condensed Matter Res Grp, H-1111 Budapest, Hungary

[3] Otto VonGuericke Univ Magdegurg, Inst Expt Phys, D-39106 Magdeburg, Germany

[4] Leibniz Inst Neurobiol, D-39118 Magdeburg, Germany

来源：

SOFT MATTER | 2011年 / 7卷 / 18期

基金：

匈牙利科学研究基金会;

关键词：

FLOWS; MICROSTRUCTURE; BULK;

D O I：

10.1039/c1sm05762f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Shear localization in granular materials is studied experimentally and numerically. The system consists of two material layers with different effective frictions. The presence of the material interface leads to a special type of "total internal reflection'' of the shear zone. In a wide range of configurations the reflection is characterized by a fixed angle which is analogous to the critical angle of refraction in optics. The zone leaves and reenters the high friction region at this critical angle and in between it stays near the interface in the low friction region. The formalism describing the geometry of the shear zones and that of refracted and reflected light beams is very similar. For the internal visualization of shear localization two independent experimental techniques were used (i) excavation and (ii) magnetic resonance imaging.

引用

页码：8330 / 8336

页数：7

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