Spherical Waves in Saturated Sand.

Gefken, Paul R.; Florence, A. L.; Sanai, Mohsen

doi:10.21236/ada318975

Cited by 6 publications

(4 citation statements)

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“…The functional form used by Equation (1) for the joint stiffness was chosen based on empirical data for quasi-static joint tests. To validate the model for a dynamic case, two sets of spherical wave experiments [31] performed at SRI with Salem limestone were simulated (one with a joint and the other one without). Radial velocity (along the joint surface) at various ranges was measured in these experiments as shown in Figure 6(I).…”

Section: Simulation Of Dynamic Experiments On Spherical Waves Propagamentioning

confidence: 99%

Discrete and continuum methods for numerical simulations of non‐linear wave propagation in discontinuous media

Vorobiev

2010

Numerical Meth Engineering

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SUMMARYThe main objective of this paper is to develop a methodology to model dynamic loading of various discontinuous media. Two methods for modeling non-linear waves in a media with multiple discontinuities are considered. The first one, a discrete method, is based on the Simple Common Plane contact algorithm. This method can be applied both to compliant contacts characterized by finite thickness and elastic moduli (such as joints in geomechanics) as well as to non-compliant frictional contacts traditionally described by the slide lines in finite element/finite difference codes. The second one, a continuum method, assumes that the contacts are not compliant and can be modeled as one or several weakness planes cutting through the elements of the computational mesh. Both discrete and continuum methods described in the paper can be applied to derive equivalent continuum properties for media with multiple discontinuities. An example of such application for a randomly jointed media is given in the paper.

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Section: Simulation Of Dynamic Experiments On Spherical Waves Propagamentioning

confidence: 99%

Discrete and continuum methods for numerical simulations of non‐linear wave propagation in discontinuous media

Vorobiev

2010

Numerical Meth Engineering

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“…To validate, the joint model dynamic experiments 14 similar to ones described in the previous section, but with a smooth joint introduced into the sample, were simulated. The results of the simulations were reported in a previous paper 11.…”

Section: Modeling Approachmentioning

confidence: 99%

“…For example, the onset of yield measured in these tests for two different limestones is shown in Figure 1 with the marker points. The model was further calibrated to describe wave propagation in dynamic experiments 14. The experimental setup is shown in Figure 3.…”

Section: Modeling Approachmentioning

confidence: 99%

Equivalent continuum modeling for non‐linear wave propagation in jointed media

Vorobiev

Antoun

2010

Numerical Meth Engineering

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SUMMARYThis paper describes a methodology to build equivalent continuum (ECC) models to represent jointed media for non-linear wave propagation. In the present work, we study the response of randomly jointed rock media both to quasi-static and dynamic loadings. We have found that, unlike in the quasi-static case where no relaxation is observed, during dynamic loading, the deviatoric stress drops in the plastic wave after reaching its peak. Such stress relaxation phenomenon is calculated in jointed media, although the model used for intact rock blocks is rate-independent. This is a strong indication that EC models for jointed rock should include some rate-dependence when used in wave propagation simulations.

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“…• Spark-Generated Bubbles [35] simulations include a 3DynaFS model [138]. • SRI Spherical Sand Shock [42] simulations include a DYSMAS/ELC model [13], and a CTH-EPIC model [13]. • Snay/Goertner Bubble [43] simulations include a 3DynaFS model [134][135][136][137][138], and an ALE3D model [105].…”

Section: Empirical Benchmark Computationsmentioning

confidence: 99%

Benchmarks for Submerged Structure Response to Underwater Explosions

Mair

1999

Shock and Vibration

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Benchmarks for submerged structure response to underwater explosions (UNDEX) are compiled. Both analytical and empirical benchmarks are presented; each type has advantages and disadvantages for the purposes of model validation, though no methodology for employing these benchmarks in a model validation effort is proposed. Benchmark computations are also referenced as part of this compilation. Finally, extension of this compilation to the UNDEX response of internal equipment and floating structures, and to hydrodynamic/hydraulic ram problems, is proposed.

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Spherical Waves in Saturated Sand.

Cited by 6 publications

References 0 publications

Discrete and continuum methods for numerical simulations of non‐linear wave propagation in discontinuous media

Discrete and continuum methods for numerical simulations of non‐linear wave propagation in discontinuous media

Equivalent continuum modeling for non‐linear wave propagation in jointed media

Benchmarks for Submerged Structure Response to Underwater Explosions

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