Experiments and modelling for characterisation and validation of a two-phase constitutive model for describing sands under explosive loading

Weckert, S. A.; Resnyansky, A. D.

doi:10.1016/j.ijimpeng.2022.104234

Cited by 4 publications

(3 citation statements)

References 56 publications

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“…Deformability increases with the water content on a macroscopic scale. However, the dynamic stress of low-saturated sand reported in [32,[49][50][51] tended to decrease compared with dry sand. No obvious decreasing trend was observed in the current study, which may have been related to the SHPB instrument used in the experiment.…”

Section: Effect Of Initial Relative Densitymentioning

confidence: 88%

Experimental Study on Dynamic Compressive Behaviors of Sand under Passive Confining Pressure

Kou

Zhang

et al. 2022

Materials

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Dynamic compressive tests of sand under passive confining pressure were carried out using a Split Hopkinson Pressure Bar (SHPB) setup. The dynamic response, energy dissipation and particle-breaking behaviors of sand subjected to high-speed impact were investigated. Sand specimens with moisture contents of 0%, 2%, 4%, 8%, 10% and 12% and relative densities of 0.1, 0.5 and 0.9 were prepared. The variation in the strain rate was controlled between 90 s−1 and 500 s−1. The specimens were confined in a designed sleeve to create passive confining pressure. The experimental results show that the sand specimens were extremely sensitive to the strain rate. When the strain rate was less than 400 s−1, the stress and strain of the specimens increased with the increase in the strain rate but decreased when the strain rate exceeded 400 s−1. The peak strain and peak stress increased with the increase in the relative density. Particle breakage was aggravated with the strain-rate increase. Compared with the specimen without water, the relative breakage rate of the specimen with a moisture content of 12% decreased by 30.53% when the strain rate was about 95 s−1 and by 25.44% when the strain rate was about 460 s−1. The analysis of energy dissipation revealed the essential cause of sand destruction. The specific energy absorption rate increased with the increases in the initial relative density and moisture content.

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Section: Effect Of Initial Relative Densitymentioning

confidence: 88%

Experimental Study on Dynamic Compressive Behaviors of Sand under Passive Confining Pressure

Kou

Zhang

et al. 2022

Materials

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“…The dynamic compaction response of the two sands could also be a cause for variations in impulse. Testing by Weckert and Resnyansky [35] has shown that, in dynamic testing, the stiffness of the carbonate sand is lower than that of the quartz sands and that this is also a product of the moisture content of the sand, as seen previously [36]. It is known that the plate-like particles of carbonate sands likely produce soils with greater shear strength at low stresses [15,16].…”

Section: Data Availability Statementmentioning

confidence: 97%

“…It is known that the plate-like particles of carbonate sands likely produce soils with greater shear strength at low stresses [15,16]. At higher stresses, the authors of [35] indicated little difference between the two soils at higher degrees of compression. Whether this behaviour has an impact at the high stresses seen in blast events is as yet unknown but will be the focus of future research.…”

Section: Data Availability Statementmentioning

confidence: 99%

The Effect of Soil Mineralogy and Particle Breakage on the Impulse Generated from Shallow Buried Charges

et al. 2023

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Historically, most testing with shallow buried charges has focussed on soils which are predominantly quartz (silica)-based. Particle size, moisture content and density have previously been investigated to ascertain their importance, along with other geotechnical parameters, in governing the magnitude of an impulsive output. This has shown that, in order of importance, moisture content, density and particle size drive the total impulse imparted. The work in this paper presents the results of blast testing carried out with carbonate sands to investigate the difference that particle mineralogy (and hence, propensity for breakage) has on both the localised loading and the total impulse using an array of 17 Hopkinson pressure bars known as the Characterisation of Blast Loading (CoBL) apparatus. Carbonate sands are thought to have more friable particles due to their plate-like morphology, as opposed to the rounded morphology of quartz-based sands. Testing was conducted with low moisture content samples and compared with the well-established Leighton Buzzard uniform sand to isolate the effect of particle mineralogy/morphology on the loadings measured. The results show that, despite attaining a 23% lower bulk density, carbonate soils deliver almost identical total impulses (0.7–3.0% higher) when compared with quartz soils for nominally identical moisture contents.

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Influence of solid constituent properties on thermal response of porous materials under shock loading

Weckert,

Resnyansky

2023

SHOCK COMPRESSION OF CONDENSED MATTER - 2022: Proceedings of the Conference of the American Physical Society Topical Group on S

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Experiments and modelling for characterisation and validation of a two-phase constitutive model for describing sands under explosive loading

Cited by 4 publications

References 56 publications

Experimental Study on Dynamic Compressive Behaviors of Sand under Passive Confining Pressure

Experimental Study on Dynamic Compressive Behaviors of Sand under Passive Confining Pressure

The Effect of Soil Mineralogy and Particle Breakage on the Impulse Generated from Shallow Buried Charges

Influence of solid constituent properties on thermal response of porous materials under shock loading

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