The penetration of rigid long rods – revisited

Rosenberg, Z.; Dekel, E.

doi:10.1016/j.ijimpeng.2008.06.001

Cited by 82 publications

(150 citation statements)

References 17 publications

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“…It is interesting to note that constant decelerations have also been reported in numerical simulations of the penetration of rods into metal and concrete targets, provided the penetration velocity is below a critical value and the diameter of the hole created does not exceed the diameter of the penetrating rod (Rosenberg & Dekel, 2009). …”

Section: Dynamic Analysis Of a Smooth Penetrometer Free-falling Into mentioning

confidence: 77%

Dynamic analysis of a smooth penetrometer free-falling into uniform clay

Nazem¹,

Carter²,

Airey³

et al. 2012

Géotechnique

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The finite-element analysis of free-falling objects penetrating soil deposits is one of the most sophisticated and challenging problems in geomechanics. A robust numerical method will be described here for dealing with such complex and difficult problems. The approach is based on the arbitrary Lagrangian-Eulerian (ALE) method of analysis, the main features and challenges of which are described briefly in the paper. The ALE method is then employed to perform a parametric study of a perfectly smooth penetrometer free-falling into a uniform layer of clay, which deforms under undrained conditions. The effect of the mechanical properties of the clay soil on the penetration characteristics is presented, and an approximate, closed-form expression is derived for the dynamic penetration factor, N dp : Comparisons are made between the deduced values of N dp and published values of the conventional cone factor, N c , and comparisons are made with experimental data to validate the approach.KEYWORDS: numerical modelling; offshore engineering; shear strength; site investigation; soil/structure interaction L'analyse aux éléments finis d'objets en chute libre péné-trant dans des dépôts de sol est un des problèmes les plus sophistiqués et difficiles de la géomécanique. La présente communication décrit une méthode numérique robuste pour résoudre des problèmes aussi complexes et difficiles. Cette approche est basée sur la méthode d'analyse Lagrangien-Eulérien arbitraire (ALE), dont les principaux problèmes et caractéristiques sont décrits brièvement. On utilise ensuite la méthode ALE pour effectuer une étude paramétrique d'un pénétromètre parfaitement lisse tombant dans une couche d'argile uniforme, qui se déforme dans des conditions non drainées. On présente l'effet des propriétés mécaniques du sol d'argile sur les caractéris-tiques de pénétration, et on dérive une expression à forme fermée pour le facteur de pénétration dynamique N dp : On effectue des comparaisons entre les valeurs déduites de N dp et des valeurs publiées du facteur de cone N c , pour procéder ensuite à des comparaisons avec des données expérimentales pour valider cette approche.

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Section: Dynamic Analysis Of a Smooth Penetrometer Free-falling Into mentioning

confidence: 77%

Dynamic analysis of a smooth penetrometer free-falling into uniform clay

Nazem¹,

Carter²,

Airey³

et al. 2012

Géotechnique

View full text Add to dashboard Cite

show abstract

“…A number of theoretical approaches to penetration mechanics have been proposed. These include: hydrodynamic models which neglect yield strength [3][4][5]; models which use a modified Bernoulli equation that includes yield strength approximately [6][7][8]; onedimensional models based on a balance of rate of work and rate of energy dissipation [9][10][11]; models based on the contact pressure for spherical or cylindrical cavity expansion [12][13][14][15][16][17][18][19][20][21]; models based on approximate flow fields [22][23][24][25][26][27][28]; and full numerical simulations [29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…[32]. Specifically, Rosenberg and Dekel [32] analyzed a number of numerical simulations of rigid projectiles with different nose shapes penetrating a compressible elastic-perfectly-plastic material. They considered penetration velocities in aluminum up to about 1.5 km/s and concluded that the drag force is insensitive to the penetration velocity.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Separation and velocity dependence of the drag force applied to a rigid ovoid of Rankine nosed projectile penetrating an elastic–perfectly-plastic target

Rapoport

Rubin

2009

International Journal of Impact Engineering

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“…For penetration of non-deformable projectiles at sub ordnance or ordnance velocity into concrete targets, it is found experimentally that the influence of both modulus of elasticity and Poisson ratio of the projectile 19 as well as of the target 20,21 on the DOP can be neglected. In addition, most DOP models 10 appear independent on ρ t .…”

Section: Similarity Analysismentioning

confidence: 99%

Similarity Analysis of Projectile Penetration into Concrete

Huang

Tong

et al. 2018

Def. Sc. Jl.

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A dimensionless model for the depth of penetration (DOP) of a projectile penetrating into a concrete target, based on the similarity theory involving intermediate asymptotics, complete similarity, and incomplete similarity is presented. The calculated numerical results are in good agreement with previous experimental data, including two sets of full-scale and twenty-four sets of sub-scale penetration of non-deformable projectiles into concrete targets. Moreover, compared with several empirical and semi-empirical DOP models, the new model is applicable within a relatively broader range, including the penetration of both sub-scale and full-scale projectiles. For the limitations of the validity, dimensionless parameters Π 3 =ϕ t /ϕ larger than 12, Π 4 = (ϕ 3 f c )/(Mv 0 2 ) smaller than 0.1, and the initial impact velocity of the projectile less than about 900 m/s to 1000 m/s are necessary for the model.

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The penetration of rigid long rods – revisited

Cited by 82 publications

References 17 publications

Dynamic analysis of a smooth penetrometer free-falling into uniform clay

Dynamic analysis of a smooth penetrometer free-falling into uniform clay

Separation and velocity dependence of the drag force applied to a rigid ovoid of Rankine nosed projectile penetrating an elastic–perfectly-plastic target

Similarity Analysis of Projectile Penetration into Concrete

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