Experimental investigation of shear band patterns in granular material

Wolf, H.; König, Diethard; Triantafyllidis, Theodoros

doi:10.1016/s0191-8141(02)00163-3

Cited by 109 publications

(41 citation statements)

References 35 publications

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“…The rate-dependent rheology proposed by Jop et al [5] therefore implies that the orientations of shear bands depend on the dimensionless number I for small to moderate values of this number. Experiments reported in [19] did not show a dependence of the shear bands inclination on the rate of loading. However, these results were obtained under different conditions, in particular the specimens were loaded in extension.…”

Section: Shear Band Evolution As a Function Of Imentioning

confidence: 79%

Rate effects in dense granular materials: Linear stability analysis and the fall of granular columns

Lemiale

Mühlhaus

Meriaux

et al. 2011

Num Anal Meth Geomechanics

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SUMMARYIn this paper, the suitability of rate-dependent constitutive relationships to model the rheology of granular materials is investigated. In particular, the formation of shear bands as predicted by this approach is studied. First, a rate-dependent model is investigated in terms of a linear stability analysis. It turns out that at low to moderate strain rates, the orientation of shear bands tends to vary from the so-called Roscoe and Coulomb solutions towards a unique admissible orientation with an increase of the so-called inertial number I . This effect is confirmed by numerical simulations of a compression test performed with a particle in cell finite element program. To further assess the validity of continuum approaches for the simulation of dense granular flows, a quasi-static fall of a granular column is studied numerically and the results are confronted to available experimental data. It is shown that a satisfying agreement is obtained at different aspect ratios and for the two materials investigated in this paper, i.e. sand and glass beads. The results reported in the present paper demonstrate the relevance of continuum approaches in the modelling of dense granular flows.

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Section: Shear Band Evolution As a Function Of Imentioning

confidence: 79%

Rate effects in dense granular materials: Linear stability analysis and the fall of granular columns

Lemiale

Mühlhaus

Meriaux

et al. 2011

Num Anal Meth Geomechanics

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“…The sand was sprinkled from 30 cm above the model surface to avoid preexisting weak planes and not pre-compacted before deformation. Time-lapse digital pictures of the experiments, acquired and saved automatically every 15 s using a PC-based controller, were analyzed using the Digital Image et al 1996), and has been applied to strain monitoring in experimental structural geology (White et al 2001;Adam et al 2005;Wolf et al 2003;Yamada et al 2006Yamada et al , 2010. The method divides the pictures into sub-units and calculates the displacement field of each unit by correlating the pattern of brightness in the time series of pictures.…”

Section: Methodsmentioning

confidence: 99%

Slope Failures in Analogue Models of Accretionary Wedges

Yamada

Oshima

Matsuoka

2011

Submarine Mass Movements and Their Consequences

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Sandbox models commonly produce slope failures and mass-transport on the top free surface, which can be an analogue for submarine slides. We have been conducting shortening experiments to model accretionary wedges at subduction margins under several basement configurations of the subducting plate. Slope failures periodically occur when thrust faults reach the top surface of the models. These failures are triggered by steepening of slopes related to the displacement along the underlying thrusts. Internal stress field and physical property of materials may have little impact on the pattern and geometry of failures. Experiments with a topographic relief (e.g., horst) in the basement produce irregular distribution in time of thrusting. Long-lived thrusts, generally initiate at the foot of topographic highs, tend to form longer slopes with thick piles of failed sediments in the footwall. These suggest that anomalous amount of failed sediments in accretionary wedge regions can be used to assume topographic relief in the basement that affected the geometry of detachment. When subducted, such detachment geometries may not be easy to recognize with geophysical technique. Keywords

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“…Upon loading or unloading, the particles may slide, rotate, crush, or break. The deformation and breakage mechanisms of particulate materials are sufficiently complicated that many experimental studies have attempted to characterize these processes (see, e.g., Rowe 1962;Drescher 1976;Chappell 1979;Oda et al 1980;Calvetti et al 1997;Lanier 2001;Wolf et al 2003;Delenne et al 2004). Furthermore, several researchers have employed theoretical and numerical methods to study the deformation mechanisms of particulate materials (McDowell et al 1996;Anandarajah 2004;Chang and Hicher 2005).…”

Section: Introductionmentioning

confidence: 98%

Deformation Mechanisms of Crushable Blocky Materials Upon Lateral Unloading for a Biaxial Stress State

Liu

2011

Rock Mech Rock Eng

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Experimental investigation of shear band patterns in granular material

Cited by 109 publications

References 35 publications

Rate effects in dense granular materials: Linear stability analysis and the fall of granular columns

Rate effects in dense granular materials: Linear stability analysis and the fall of granular columns

Slope Failures in Analogue Models of Accretionary Wedges

Deformation Mechanisms of Crushable Blocky Materials Upon Lateral Unloading for a Biaxial Stress State

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