Experimental and numerical study of peculiarities at high-velocity interaction between a projectile and discrete bumpers

Myagkov, N. N.; Shumikhin, T. A.; Bezrukov, L. N.

doi:10.1016/j.ijimpeng.2010.04.001

Cited by 18 publications

(13 citation statements)

References 10 publications

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“…The problem of projectile fragmentation at high impact velocity on a shield is also related to the task of spacecraft protection from meteoroids and space debris. As is known [11,21], this protection is usually based on a scheme, whereby a thin shield is placed in front of a wall to be protected.…”

Section: Numerical Simulation Methodmentioning

confidence: 99%

“…the exponent τ grows as the effective dimension increases [23]. Dependence of the exponent τ on the initial energy imparted to a fragmented object was obtained in experiments and numerical simulations (e.g., [11,12,15,24]); it was found that the exponent τ increases with the initial energy. The authors of several papers (see, e.g., [24]) interpreted this behavior as an example that the fragmentation is not a self-organizing phenomenon, in contrast to the assumption made in a number of papers beginning with the well-known paper [25].…”

mentioning

confidence: 88%

“…Simulations (e.g., see Fig. 3 in [9]) and experiments [2,5,11] show that the character of projectile fragmentation upon impact on thin shield depends on the impact velocity. It is well known from ballistics data that a projectile perforates a thin shield at much lower velocities than those necessary for the projectile fragmentation.…”

Section: Patterns Of Spherical Projectile Fragmentation On Thin Mesh mentioning

confidence: 99%

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Scaling Invariance and Characteristics of the Cloud of Spherical Projectile Fragmentation Products upon High-Velocity Impact on a Thin Mesh Shield

Myagkov¹

2018

J. Exp. Theor. Phys.

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In the present paper we consider the problem of the fragmentation of an aluminum projectile on a thin steel mesh shield at high-velocity impact in a three-dimensional (3D) setting. The numerical simulations are carried out by smoothed particle hydrodynamics method applied to the equations of mechanics of deformable solids. Quantitative characteristics of the projectile fragmentation are obtained by studying statistics of the cloud of fragments. The considerable attention is given to scaling laws accompanying the fragmentation of the projectile. Scaling is carried out using the parameter K which defines the number of the mesh cells falling within the projectile diameter. It is found that the dependence of the critical velocity V c of fragmentation on the parameter K consists of two branches that correspond to two modes of the projectile fragmentation associated with the "small" and "large" aperture of the mesh cell. We obtain the dependences of the critical velocity V c on the projectile diameter and the mesh parameters for the both modes of the fragmentation. It is shown that the average cumulative mass distributions constructed at V c exhibit the property of scale invariance, splitting into two groups of distributions exactly corresponding to the modes of the projectile fragmentation. In each group, the average cumulative distributions show good coincidence in the entire mass region, moreover in the intermediate mass region the each group of distributions has a power-law distribution with an exponent  different from that in the other group. The conclusion about the dependence of the exponent of the power-law distribution  on the fragmentation mode is made.Dynamic fragmentation of solids caused by impact or explosion has been studied for years . Typical experimental situations in which these phenomena take place correspond to collisions of heavy nuclei in atomic physics [3,4,19,20], collision of macroscopic bodies [1,12,16] (including projectile impact on a massive target [1,17,18,23,25]), shell fragmentation upon explosion [13], and projectile fragmentation upon high-velocity perforation of a thin shield [2, 5, 6, 8-11, 21, 22].A possible critical behavior during fragmentation was originally analyzed in the framework of a problem of nuclear collisions at moderate energies [3,4,19,20] using an approach based on the similarity of the observed distribution of fragments and that predicted by well-known theories of critical phenomena such as liquid-vapor transition and percolation. Later, these methods were applied to studying fragmentation in mechanical systems [8-10, 12-18, 24]. The existence of a critical transition from damage to fragmentation was confirmed for mechanical systems of various types both experimentally [14,15] and numerically [8-10, 11-13, 16-18].The transition from damage to fragmentation (or the degree of fracture) can be characterized in different ways, including the average fragment mass, mass of maximum fragment, fluctuations of the mass of largest fragment, etc. [3,4,12,13,19,20]. In syste...

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Section: Numerical Simulation Methodmentioning

confidence: 99%

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confidence: 88%

Section: Patterns Of Spherical Projectile Fragmentation On Thin Mesh mentioning

confidence: 99%

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Scaling Invariance and Characteristics of the Cloud of Spherical Projectile Fragmentation Products upon High-Velocity Impact on a Thin Mesh Shield

Myagkov¹

2018

J. Exp. Theor. Phys.

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“…In this regard, applying metallic meshes was found to be beneficial because of their low areal density. Fragmentation of centimeter-size hypervelocity projectiles on stand-alone metallic meshes was experimentally studied in [5,6]. The meshes demonstrated the ability to significantly decelerate the projectiles [5] and breaking them up by forming jets of material that "squeeze" through the mesh apertures [6].…”

Section: Introductionmentioning

confidence: 99%

“…Fragmentation of centimeter-size hypervelocity projectiles on stand-alone metallic meshes was experimentally studied in [5,6]. The meshes demonstrated the ability to significantly decelerate the projectiles [5] and breaking them up by forming jets of material that "squeeze" through the mesh apertures [6]. Experimental studies conducted by NASA [7,8] showed that so-called mesh double-bumper shield, consisting of spaced discrete (mesh), continuous (aluminum plates), and flexible (fabrics) layers, may have lower ballistic weight compared to the conventional shield with a continuous bumper.…”

Section: Introductionmentioning

confidence: 99%

Fragmentation of Millimeter-Size Hypervelocity Projectiles on Combined Mesh-Plate Bumpers

Cherniaev

Telichev

2017

Advances in Materials Science and Engineering

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This numerical study evaluates the concept of a combined mesh-plate bumper as a shielding system protecting unmanned spacecraft from small (1 mm) orbital debris impacts. Two-component bumpers consisting of an external layer of woven mesh (aluminum or steel) directly applied to a surface of the aluminum plate are considered. Results of numerical modeling with a projectile velocity of 7 km/s indicate that, in comparison to the steel mesh-combined bumper, the combination of aluminum mesh and aluminum plate provides better fragmentation of small hypervelocity projectiles. At the same time, none of the combined mesh/plate bumpers provide a significant increase of ballistic properties as compared to an aluminum plate bumper. This indicates that the positive results reported in the literature for bumpers with metallic meshes and large projectiles are not scalable down to millimeter-sized particles. Based on this investigation's results, a possible modification of the combined mesh/plate bumper is proposed for the future study.

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Numerical Simulation of Impact Damage Induced by Orbital Debris on Shielded Wall of Composite Overwrapped Pressure Vessel

Cherniaev

Telichev

2014

Appl Compos Mater

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Experimental and numerical study of peculiarities at high-velocity interaction between a projectile and discrete bumpers

Cited by 18 publications

References 10 publications

Scaling Invariance and Characteristics of the Cloud of Spherical Projectile Fragmentation Products upon High-Velocity Impact on a Thin Mesh Shield

Scaling Invariance and Characteristics of the Cloud of Spherical Projectile Fragmentation Products upon High-Velocity Impact on a Thin Mesh Shield

Fragmentation of Millimeter-Size Hypervelocity Projectiles on Combined Mesh-Plate Bumpers

Numerical Simulation of Impact Damage Induced by Orbital Debris on Shielded Wall of Composite Overwrapped Pressure Vessel

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