An Experimental Investigation on the Mechanical Behavior Between Cemented Granules

Jiang, Mingjing; Sun, Yanan; Xiao, Yingyuan

doi:10.1520/gtj104408

Cited by 43 publications

(52 citation statements)

References 30 publications

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“…To ensure similar packing of the cement particles, a rectangular DEM sample (12 mm wide and 24 mm high; planar void ratio = 0·22) was first generated using the method proposed by Jiang et al (2003) and then tailored into sub-samples by removing particles beyond pre-defined boundaries. The cement particles at the boundary were clumped with the grain particle (represented as a single disc) to accommodate a no-slip interface to avoid interface debonding, since a previous experimental study (Jiang et al, 2012) indicated that a well-prepared bond often fails through the bond itself (Pinkert & Grozic, 2014). Nevertheless, the presented study can be easily extended to debonding by changing boundary conditions.…”

Section: Methodsmentioning

confidence: 99%

“…This leads to a success rate as low as 25% in thousands of samples (Jiang et al, 2012 and necessitates numerical analyses under well-controlled conditions. Secondly, although the presented data were obtained from samples that failed through the cementation according to visual inspection, micro-fractures at the interface cannot be exclusively avoided.…”

Section: Comparison With Experimentsmentioning

confidence: 99%

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On the size-dependent compressive resistance of bonded granules

Liu¹,

Jiang²

2015

Géotechnique Letters

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Peculiar properties of cemented geomaterials are endowed by inter-particle bonds, of which the contact behaviour has recently been found to be size dependent. This study uses the distinct-element method to investigate the size effect on the compressive resistance of an inter-particle bond, which is modelled as an assemblage of tiny bonded particles. The model parameters are carefully calibrated according to laboratory observation of a realistic reference material. The simulations demonstrate that the compressive resistance of the bond largely depends on bond slenderness and boundary curvature as well as the bond contact area. The combined effect of three size parameters can be captured in a single formula. Given the bond contact area in common, a thin bond between large particles tends to fail at higher compressive force than a thick bond between small particles because the coalescence of micro-cracks inside the bond is hindered more effectively in the thin case, resulting in ultimate failure due to compressive crushing rather than tensile cracking. A full consideration of the size effect on the bond contact strength may change the picture of progressive bond breakage in cemented geomaterials, which deserves further investigation once a size-dependent bond contact law is obtained.

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Section: Methodsmentioning

confidence: 99%

Section: Comparison With Experimentsmentioning

confidence: 99%

On the size-dependent compressive resistance of bonded granules

Liu¹,

Jiang²

2015

Géotechnique Letters

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“…Laboratory tests have been conducted on pairs of rods bonded by cement or epoxy resin to study the bond failure criteria [37,[42][43]. A bond failure law has been proposed as 2 2 ' ' 1 intact bond 1 failure …”

Section: Mh Bond Breakage Criterionmentioning

confidence: 99%

DEM simulations of methane hydrate exploitation by thermal recovery and depressurization methods

Jiang

Cui

et al. 2016

Computers and Geotechnics

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“…A detailed physical explanation of the micromechanical mechanisms leading to rolling resistance can be found in Jiang et al (2005cJiang et al ( , 2009 for uncemented sands, and in Jiang et al (2006aJiang et al ( , 2013c for cemented sands. Lunar regolith grains are very angular so that their resistance to rolling is high, contributing to the large observed friction angle of the assembly.…”

Section: Rolling Directionmentioning

confidence: 99%

DEM modeling of cantilever retaining excavations: implications for lunar constructions

Jiang

Shen

Utili

2016

Engineering Computations

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Users who downloaded this article also downloaded: (2016),"Simulation of one dimension shock initiation of condensed explosive by SPH method", Engineering Computations, Vol. 33 Iss 2 pp. 528-542 http://dx. (2016),"Routing algorithm with QoS constraints for real time multicast communications using particle swarm optimization and genetic meta-optimizer", Engineering Computations, Vol. 33 Iss 2 pp. 344-365 http://dx.(2016),"A new strain-based finite element for plane elasticity problems", Engineering Computations, Vol. 33 Iss 2 pp. 562-579 http://dx.If you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation. AbstractPurpose -Retained excavation is important for future lunar exploratory missions and potential human colonization that requires the construction of permanent outposts. Knowledge in excavation obtained on the earth is not directly applicable to lunar excavation because of the low lunar gravity and the non-negligible adhesive van der Waals interactions between lunar regolith grains. The purpose of this paper is to reveal how the gravity level and lunar environment conditions should be considered to extend the knowledge in earth excavation response to lunar excavation. Design/methodology/approach -Two-dimensional discrete element method simulations were carried out to investigate the respective effect of gravity level and lunar environment conditions (highvacuum and extreme temperature) on retained excavation response. A novel contact model was employed with a moment -relative rotation law to account for the angularity of lunar soil particles, and a normal attractive force to account for the van der Waals interactions. Findings -The simulation results showed that the excavation response is non-linearly related to the gravity level. Van der Waals interactions can increase the dilatancy of lunar regolith and, surprisingly as a consequence, significantly increase the bending moment and deflection of the retaining wall, and the ground displacements. Based on the simulation results, a parabola model was proposed to predict the excavation-induced lateral ground movements on the moon. Originality/value -This study indicates that an unsafe estimate of the wall response to an excavation on the moon would be obtained if only the effect of gravity is...

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An Experimental Investigation on the Mechanical Behavior Between Cemented Granules

Cited by 43 publications

References 30 publications

On the size-dependent compressive resistance of bonded granules

On the size-dependent compressive resistance of bonded granules

DEM simulations of methane hydrate exploitation by thermal recovery and depressurization methods

DEM modeling of cantilever retaining excavations: implications for lunar constructions

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