Characterization of additive manufactured particles for DEM validation studies

Kittu, Anjana Thoroppady; Watters, Matthew P.; Cavarretta, I.; Bernhardt-Barry, Michelle L.

doi:10.1007/s10035-019-0908-4

Cited by 11 publications

(4 citation statements)

References 18 publications

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“…Bender element test results on 3D printed particles revealed the dependency of shear wave velocity and shear modulus on mean effective stress and void ratio, similar to that observed in natural sands [2]. A characterization study of the contact behavior of 3D printed spheres of different materials indicated that 3D printed particles may be used to validate discrete element method (DEM) simulations against experimental results [26]. The above findings demonstrate the ability of 3D printed particle analogs to emulate the macro-scale behavior of coarse-grained soil.…”

Section: Introductionsupporting

confidence: 53%

“…One of the greatest potential benefits offered by the 3D printed sands is the ability to systematically control different particle properties, such as the shape, size, and constituent material. Additionally, 3D printed particles may also enhance validation procedures for discrete element modeling simulations against experimental data by ensuring the use of particles with similar morphology in both experimental and numerical investigations [26]. The results presented here indicate that polyjet 3D printing technology can be used to successfully reproduce the shape of natural sand particles (Figs.…”

Section: Discussion On the Modeling Of Soil Behavior With 3d Printed Particle Analogsmentioning

confidence: 68%

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Triaxial compression behavior of 3D printed and natural sands

Ahmed

Martínez

2021

Granular Matter

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Different particle properties, such as shape, size, surface roughness, and constituent material stiffness, affect the mechanical behavior of coarse-grained soils. Systematic investigation of the individual effects of these properties requires careful control over other properties, which is a pervasive challenge in investigations with natural soils. The rapid advance of 3D printing technology provides the ability to produce analog particles with independent control over particle size and shape. This study examines the triaxial compression behavior of specimens of 3D printed sand particles and compares it to that of natural sand specimens. Drained and undrained isotropically-consolidated triaxial compression tests were performed on specimens composed of angular and rounded 3D printed and natural sands. The test results indicate that the 3D printed sands exhibit stress-dilatancy behavior that follows well-established flow rules, the angular 3D printed sand mobilizes greater critical state friction angle than that of rounded 3D printed sand, and analogous drained and undrained stress paths can be followed by 3D printed and natural sands with similar initial void ratios if the cell pressure is scaled. The results suggest that some of the fundamental behaviors of soils can be captured with 3D printed soils, and that the interpretation of their mechanical response can be captured with the critical state soil mechanics framework. However, important differences in response arise from the 3D printing process and the smaller stiffness of the printed polymeric material. Graphic abstract Artificial sand analogs were 3D printed from X-ray CT scans of sub-rounded and sub-angular natural sands. Triaxial compression tests were performed to characterize the strength and dilatancy behavior as well as critical staste parameters of the 3D printed sands and to compare it to that exhibited by the natural sands.

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Section: Introductionsupporting

confidence: 53%

Section: Discussion On the Modeling Of Soil Behavior With 3d Printed Particle Analogsmentioning

confidence: 68%

Triaxial compression behavior of 3D printed and natural sands

Ahmed

Martínez

2021

Granular Matter

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“…As a cementing material, gypsum is widely used in various tests and is also a popular raw material for the 3D printing of geotechnical materials (Kong et al 2018a(Kong et al , 2018bKittu et al 2019;Wu 2019). The gypsum powder used in this study, which is high-strength α-hemihydrate gypsum (CaSO4•1/2H2O), was produced by the Shanghai Huaqiang Gypsum Factory.…”

Section: Preparation Of the Dyed Gypsum Particlesmentioning

confidence: 99%

Exploration of the Survival Probability and Shape Evolution of Crushable Particles during One-Dimensional Compression Using Dyed Gypsum Particles

Shen

Liu

et al. 2020

J. Geotech. Geoenviron. Eng.

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Observing the fragmentation of individual particles within granular assemblies is a subject of evident theoretical and practical importance. A new technique using dyed gypsum particles (DGPs) to match the broken particles to their parents was adopted in this study. An image-based method of acquiring the shape information of particles from two orthogonal views was proposed. The mass survival probability and shape characteristics of the children particles were analyzed after a series of one-dimensional compression tests on the DGPs. It was found that medium-sized particles in the polydisperse samples underwent more breakage than the other particles, and this might have been attributed to the combined effects of the particle crushing strength and the coordination number. The shape evolution of broken particles and surviving particles showed opposite trends. As the particles after the test within a given size range consisted of both the broken and surviving particles, their overall shape characteristics did not show a consistent trend. Furthermore, individual particle crushing tests on the children particles suggested that the breakage-induced shape irregularity did not change the Weibull modulus, but had a substantial effect on the magnitude of the survival probability.

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“…In geomechanics, accurate evaluation of surface roughness for granular materials has remained challenging as the surface of soil particles is non-flat and has its inherent curvature. Several methods have been used to quantify surface roughness characteristics, among which one of the most commonly used methods is the so-called motif method [12,16,21,22,23]. Previous researchers used a built-in function available in a commercial software Fogale Viewer [24] to extract base curvature.…”

Section: Introductionmentioning

confidence: 99%