Prediction of material strength and fracture of glass using the SPHINX smooth particle hydrodynamics code

Mandell, D.A.; Wingate, C.A.

doi:10.2172/29427

Cited by 9 publications

(13 citation statements)

References 7 publications

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“…14) 15) and the summations are over all particles. In the expressions for the S j the origin of the coordinate system has been shifted to the unperturbed position of particle a, and W denotes W (r b ).…”

Section: Theorymentioning

confidence: 99%

“…Randles and Libersky [9] used dissipative terms, which they call conservative smoothing, to remove the instability. However, this is not satisfactory in all cases [10]. Johnson and Beissel [11] combine normalizing the kernels to handle boundary effects with a quadratic kernel to reduce the tensile instability.…”

Section: Introductionmentioning

confidence: 99%

“…Some computational studies of fracture in brittle materials have been based on SPH simulations (see for example [15,2]) which adopt the practical view that brittle solids break up before a tensile instability can grow significantly. Their simulations incorporate a damage model which describes the growth of small fractures and the resulting loss of strength during an impact.…”

Section: Introductionmentioning

confidence: 99%

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SPH without a Tensile Instability

Monaghan

2000

Journal of Computational Physics

754

437

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Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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SPH without a Tensile Instability

Monaghan

2000

Journal of Computational Physics

754

437

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“…In the case of impacts and other hypervelocity phenomena, shock waves (discontinuous by definition) must be "smeared out" using artificial viscosity (von Neumann and Richtmyer, 1950). Much recent effort (Melosh et al, 1992;Asphaug and Melosh, 1993;Asphaug, 1994, 1995;Mandell and Wingate, 1994) has been devoted to the task of deriving stable and accurate systems of equations describing the impact failure of brittle solids, and the field remains a young and active one.…”

Section: Hydrocode Simulationsmentioning

confidence: 99%

Impact origin of the Vesta family

Asphaug

1997

Meteorit & Planetary Scien

114

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Abstract-The compelling petrographic link (Consolmagno and Drake, 1977;Gaffey, 1983) between basaltic achondrite meteorites and the -530 km diameter asteroid 4 Vesta has been tempered by a perceived difficulty in launching rocks from this asteroid's surface at speeds sufiicient to bring them to Earth (Wasson and Wetherill, 1979) without obliterating Vesta's signature crust. I address this impasse in response to recent imaging (Zellner et al., 1996;Dumas and Hainaut, 1996) of a -450 km impact basin across Vesta's southern hemisphere and model the basin-forming collision using a detailed two-dimensional hydrocode with brittle fracture including self-gravitational compression (cf , Asphaug and Melosh, 1993). A -42 km diameter asteroid striking Vesta's basaltic crust (atop a denser mantle and iron core) at 5.4 km/s launches multikilometer fragments up to -600 m/s without inverting distal stratigraphy, according to the code. This modeling, together with collisional, dynamical, rheological and exposure-age timescales (Marzari et al., 1996;Welten et al., 1996), and observations of V-type asteroids (Binzel and Xu, 1993) suggests a recent (<-I Ga) impact origin for the Vesta family and a possible Vesta origin for Earth-approaching V-type asteroids (Cruikshank et al., 1991).

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“…The SPH method, originally formulated for the treatment of astrophysical problems (1), has been used over the past decade to model solid mechanics problems such as bombcase fragmentation (2), impact events (3), and brittle fracture (4,5). DEM originated with the work of Cundall (6) for applications to rock mechanics and granular assemblies.…”

Section: Introductionmentioning

confidence: 99%

Modeling shock recovery experiments of sandstone

Hagelberg¹,

Swift²,

Carney³

et al. 2000

AIP Conference Proceedings

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Abstract. We present results from mesoscale modeling of shock recovery experiments on Berea sandstone with the Smooth Particle Hydrodynamics and the Discrete Element methods. Each grain is represented with clusters of Discrete Element particles to provide explicit representation of the grain and pore structure. The grain structures simulate the structures observed using synchrotron micro tomography and Scanning Electron Microscope imaging. The modeling accounts for the influence of pore fluid and illustrates how grain/pore heterogeneity under dry and saturated states affects stress wave and grain damage behavior. The simulations show characteristics of the phenomena observed in recovery experiments. An increase in grain damage coincides with an increase in stress level and pulse duration. The grains in dry samples are extremely and irregularly fragmented with extensively reduced porosity. Less grain damage and higher porosity is observed in the saturated samples. The influence of pore fluid mitigates the interaction between grains, thus reducing fragmentation damage. This modeling approach in concert with experiments offers a unique way to understand dynamic compaction of brittle porous materials.

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Prediction of material strength and fracture of glass using the SPHINX smooth particle hydrodynamics code

Cited by 9 publications

References 7 publications

SPH without a Tensile Instability

SPH without a Tensile Instability

Impact origin of the Vesta family

Modeling shock recovery experiments of sandstone

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