Experimental Evaluation of Cratering and Ground Vibration in Clay Soils Subjected to Airblast Loading

Busch, Courtney L.; Aimone-Martin, Catherine T.; Tarefder, Rafiqul A.

doi:10.1061/9780784478455.013

Cited by 3 publications

(6 citation statements)

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“…The experimental program as described in Busch et al [5] included laboratory geotechnical characterization tests, undrained triaxial compression tests, ultrasonic wave velocity tests, and direct shear tests. Small-scale explosive airblast tests were conducted on clay soils in the experiments.…”

Section: Methodsmentioning

confidence: 99%

“…The Mohr-Coulomb shear strength criterion is described in terms of maximum and minimum principal stresses and is given in Eq. (5). While this criterion is computationally simple, it does not account for the effects of intermediate principal stresses.…”

Section: Mohr-coulomb Plasticity Modelmentioning

confidence: 98%

“…Material models included the Soil and Foam pressure dependent strength model, the Pseudo Tensor pressure dependent strength model, the FHWA Drucker-Prager model and the TwoInvariant Geologic Cap model. Crater dimensions were measured from the simulations and compared to the results of airblast experiments performed in another study [5]. The MM-ALE simulation method predicted the response of explosive airblast loading on clay soils for the Soil and Foam model and Pseudo Tensor model as shown by the formation of hemispherical craters and the ejecta pushed away from the crater and along the crater walls.…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

“…Crater size and shape from the finite element calculations were compared to a small-scale airblast test performed on clay soils as described in Busch et al [5]. Finite element simulations of the field experiment were performed and crater geometry and stress response were compared to data obtained from the experimental blasts.…”

Section: Objective and Scopementioning

confidence: 99%

“…Inputs were obtained from laboratory test results as described in Busch et al [5]. A few soil properties were estimated based on engineering judgment by substituting typical properties based on soil type.…”

Section: Finite Element Simulationsmentioning

confidence: 99%

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Evaluation of Appropriate Material Models in LS-DYNA for MM-ALE Finite Element Simulations of Small-Scale Explosive Airblast Tests on Clay Soils

Busch

Tarefder

2016

Indian Geotech J

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This study conducted finite element simulations of a small scale, explosive airblast on clay soil in LS-DYNA using multi-material arbitrary Lagrangian-Eulerian methods. An explosive mass of 100.9 g with a 7.6 cm blast height was simulated in this study under two-dimensional conditions. The study compared four different material models to evaluate their ability to simulate explosivelyinduced airblast loads on cohesive soils. Material models included the Soil and Foam pressure dependent strength model, the Pseudo Tensor pressure dependent strength model, the FHWA Drucker-Prager model and the TwoInvariant Geologic Cap model. Crater dimensions were measured from the simulations and compared to the results of airblast experiments performed in another study. Three material models ran to completion with the exception of the Geologic Cap model, which terminated early in the calculation due to plasticity algorithm errors caused by the large strain increments. While the remaining three models somewhat over-predicted crater depth, the diameter dimensions and crater volumes from the Soil and Foam and particularly the Pseudo Tensor model compared very well to the experimental data. The crater shape from the FHWA model did not match particularly well with experimental results and was larger than the experimental crater. A simplified, pressure dependent strength model such as Soil and Foam model or the Pseudo Tensor model is therefore recommended for modeling small-scale airblast events on cohesive soils. The Pseudo Tensor model compared particularly well to experimental results and predicted crater dimensions very well. Additional studies with the Geologic Cap model implementing smoothed particle hydrodynamics are recommended which may resolve the errors associated with large strain increments.

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Section: Methodsmentioning

confidence: 99%

Section: Mohr-coulomb Plasticity Modelmentioning

confidence: 98%

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Section: Objective and Scopementioning

confidence: 99%

Section: Finite Element Simulationsmentioning

confidence: 99%

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Evaluation of Appropriate Material Models in LS-DYNA for MM-ALE Finite Element Simulations of Small-Scale Explosive Airblast Tests on Clay Soils

Busch

Tarefder

2016

Indian Geotech J

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Experimental and numerical investigation of badarpur sand subjected to air-blast loading

Singh,

Chakraborty

2024

International Journal of Impact Engineering

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Numerical Study of the Layered Blasting Effect on a Cemented Backfill Stope

Guo

et al. 2022

Metals

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The sublevel open stoping with backfill method has recently been widely used in underground metal mines. The primary CPB stope is frequently affected by blasting in the secondary ore stope, leading to stope collapse and ore dilution, which has become a common problem and has received widespread attention. Numerical simulations are carried out in the present work, and a 1/4 numeral model consisting of a primary CPB stope and a secondary ore stope is built. The secondary ore stope is divided into four layers on average in the simulation model, and the incident stress induced by each blasting at the interface of the CPB and ore is simulated. The results show that the CPB stope in the range within the height of the explosive charge induced horizontal compressive stress and tensile stress induced from the explosive charge height, while the mined section under the charge height has no obvious blasting impact. The maximum incident compressive stress is close to 1.2 MPa and occurs in the area closest to the blast hole The maximum induced tensile stress occurs in the range above the charge height, which is about 0.2 MPa. The stress ratios of the four-layered lift blasts are 3.6%, 3.8%, 4.0%, and 4.8%, respectively, showing a slight cumulative effect of layered blasting. In addition, the positive correlation between incident stress and the stress ratio is studied in the present work, and the results show that the greater the incident stress is, the greater the incident ratio is.

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Experimental Evaluation of Cratering and Ground Vibration in Clay Soils Subjected to Airblast Loading

Cited by 3 publications

References 1 publication

Evaluation of Appropriate Material Models in LS-DYNA for MM-ALE Finite Element Simulations of Small-Scale Explosive Airblast Tests on Clay Soils

Evaluation of Appropriate Material Models in LS-DYNA for MM-ALE Finite Element Simulations of Small-Scale Explosive Airblast Tests on Clay Soils

Experimental and numerical investigation of badarpur sand subjected to air-blast loading

Numerical Study of the Layered Blasting Effect on a Cemented Backfill Stope

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