The Tribological Behavior of Two Potential-Landslide Saprolitic Rocks

Sandeep, C.S.; Senetakis, Kostas

doi:10.1007/s00024-018-1939-1

Cited by 26 publications

(10 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, after the initial regime of plastic displacements which were more pronounced in the second cycle, the DNA‐1A curves showed a stiffer response in the second cycle compared with the virgin compression and thus reached the imposed normal force at a smaller magnitude of normal displacement. These results, similar to the recent study by Sandeep and Senetakis (), indicate the possible creation of debris due to the coupled influence of preloading and preshearing which resulted in a softer behavior of the initial regime of the second cycle of normal loading after the completion of the first shearing. Because the pure normal load tests did not show a softer initial regime in the second cycle (i.e., cyclic experiments without the application of shearing as shown in Figure ), it is speculated that the possible creation of debris at the interface is the result of the shearing at the grain contacts.…”

Section: Resultssupporting

confidence: 91%

“…Previous works (Balevicius & Mroz, ; Cavarretta et al, ; Nardelli et al, ; Nardelli & Coop, ; Sandeep & Senetakis, , ) showed that the theoretical curves plotted using the Hertz model fit the experimental data reasonably well apart from an initial regime where the behavior is elastic‐plastic to plastic for rough surface morphologies.…”

Section: Contact Mechanics Modelsmentioning

confidence: 78%

“…Based on this, significant advancements took place in recent years in microscale experimentation investigating the contact behavior of geological materials and lunar regolith simulants (e.g., Cavarretta et al, ; Cole, ; Cole & Peters, ; Nardelli et al, ; Nardelli & Coop, ; Sandeep & Senetakis, , , ; Senetakis et al, , ; Senetakis & Coop, ). It is highlighted, based on the studies by Sandeep and Senetakis (, ), that the mesoscale morphology of the grains and the previous loading history affect, markedly, the interparticle load‐displacement relationship and coefficient of friction.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Micromechanical Behavior of DNA‐1A Lunar Regolith Simulant in Comparison to Ottawa Sand

et al. 2019

Self Cite

View full text Add to dashboard Cite

In this study, the micromechanical interparticle contact behavior of “De NoArtri” (DNA‐1A) grains is investigated, which is a lunar regolith simulant, using a custom‐built micromechanical loading apparatus, and the results on the DNA‐1A are compared with Ottawa sand which is a standard quartz soil. Material characterization is performed through several techniques. Based on microhardness intender and surface profiler analyses, it was found that the DNA‐1A grains had lower values of hardness and higher values of surface roughness compared to Ottawa sand grains. In normal contact micromechanical tests, the results showed that the DNA‐1A had softer behavior compared with Ottawa sand grains and that cumulative plastic displacements were observed for the DNA‐1A simulant during cyclic compression, whereas for Ottawa sand grains elastic displacements were dominant in the cyclic sequences. In tangential contact micromechanical tests, it was shown that the interparticle friction values of DNA‐1A were much greater than that of Ottawa sand grains, which was attributed to the softer contact response and greater roughness of the DNA‐1A grains. Widely used theoretical models both in normal and tangential directions were fitted to the experimental data to obtain representative parameters, which can be useful as input in numerical analyses which use the discrete element method.

show abstract

Section: Resultssupporting

confidence: 91%

Section: Contact Mechanics Modelsmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Micromechanical Behavior of DNA‐1A Lunar Regolith Simulant in Comparison to Ottawa Sand

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Completely decomposed granite (denoted as CDG) originates from Hong Kong, and it consists of a weathered igneous rock of felsic composition, and its grains are crushable (i.e., weak grains) with irregular shapes and rough texture. LBS is a benchmark quartz sand previously studied in the Geomechanics Laboratory of City University of Hong Kong [ 69 , 70 , 71 ], BLS is a typical material (in crushed form) used as fill/backfill/ballast in infrastructure projects [ 72 ], while CDG may also find many potential applications as an earth material in tropical/subtropical regions such as Hong Kong [ 47 , 73 , 74 , 75 ].…”

Section: Methodsmentioning

confidence: 99%

“…BLS grains have formations of lightweight alkali earth metal oxides (Mg, Na, and Ca), most presumably due to the mining of the original basaltic rock. The presence of debris materials on the grain surfaces changes the micro-scale morphology of the aggregates and is expected to have a significant influence on their inter-particle contact behavior, as previous studies would also suggest [ 73 , 76 , 77 , 78 ].…”

Section: Methodsmentioning

confidence: 99%

Influence of Loading History and Soil Type on the Normal Contact Behavior of Natural Sand Grain-Elastomer Composite Interfaces

2021

Self Cite

View full text Add to dashboard Cite

Recycled rubber in granulated form is a promising geosynthetic material to be used in geotechnical/geo-environmental engineering and infrastructure projects, and it is typically mixed with natural soils/aggregates. However, the complex interactions of grains between geological materials (considered as rigid bodies) and granulated rubber (considered as soft bodies) have not been investigated systematically. These interactions are expected to have a significant influence on the bulk strength, deformation characteristics, and stiffness of binary materials. In the present study, micromechanical-based experiments are performed applying cyclic loading tests investigating the normal contact behavior of rigid–soft interfaces. Three different geological materials were used as “rigid” grains, which have different origins and surface textures. Granulated rubber was used as a “soft” grain simulant; this material has viscoelastic behavior and consists of waste automobile tires. Ten cycles of loading–unloading were applied without and with preloading (i.e., applying a greater normal load in the first cycle compared with the consecutive cycles). The data analysis showed that the composite sand–rubber interfaces had significantly reduced plastic displacements, and their behavior was more homogenized compared with that of the pure sand grain contacts. For pure sand grain contacts, their behavior was heavily dependent on the surface roughness and the presence of natural coating, leading, especially for weathered grains, to very high plastic energy fractions and significant plastic displacements. The behavior of the rigid–soft interfaces was dominated by the rubber grain, and the results showed significant differences in terms of elastic and plastic fractions of displacement and dissipated energy compared with those of rigid interfaces. Additional analysis was performed quantifying the normal contact stiffness, and the Hertz model was implemented in some of the rigid and rigid–soft interfaces.

show abstract

An Experimental Investigation on the Tribological Behaviour of Nominally Flat Quartz Grains with Gouge Material in Dry, Partial Saturated and Submersed Conditions

Kasyap

Senetakis

2020

Pure Appl. Geophys.

View full text Add to dashboard Cite

The Tribological Behavior of Two Potential-Landslide Saprolitic Rocks

Cited by 26 publications

References 69 publications

Micromechanical Behavior of DNA‐1A Lunar Regolith Simulant in Comparison to Ottawa Sand

Micromechanical Behavior of DNA‐1A Lunar Regolith Simulant in Comparison to Ottawa Sand

Influence of Loading History and Soil Type on the Normal Contact Behavior of Natural Sand Grain-Elastomer Composite Interfaces

An Experimental Investigation on the Tribological Behaviour of Nominally Flat Quartz Grains with Gouge Material in Dry, Partial Saturated and Submersed Conditions

Contact Info

Product

Resources

About