Numerical simulation of hypervelocity impact problem for spacecraft shielding elements

Silnikov, М.V.; Guk, I. V.; Nechunaev, A.F.; Смирнов, Н.Н.

doi:10.1016/j.actaastro.2017.08.030

Cited by 66 publications

(8 citation statements)

References 21 publications

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“…Alternately, Smoothed particle hydrodynamics (SPH) is a model of computing systems used for a mechanical simulation such as mechanics of solids and fluid flow which comprises a mesh-free lagrangian method [20,34]. SPH shows benefits in terms of the change in coordinates with the fluid flow, for evaluating the flow properties irrespective of the spatial variation.…”

Section: Numerical Simulationmentioning

confidence: 99%

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Advances in the Whipple Shield Design and Development:

Pai

Divakaran

Anand

et al. 2021

J. dynamic behavior mater.

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Safety of satellites as well as spacecrafts during space missions is a primary objective to preserve the physical and virtual assets onboard. Whipple shields belong to the class of protective equipment provided on the surface of the spacecrafts and satellites, to sustain impacts from the ultra-high speed debris, which can otherwise cause considerable damage to the corresponding structures. Recent works on whipple shields are focussed on determining the response of different geometrical arrangements and material properties under hyper-velocity impact at projectile speeds of 3-18 km/s. Advances in the whipple shield design include integrated and mechanised models employing high performance materials like fiber-metal laminates ensuring better operational capability. The forward bumper of the whipple shield is the first line of defence as it regulates the state of projectile after the primary impact. Use of aluminium alloys for front bumpers is popular, owing to their lightweight and strength characteristics. The advances for the front bumper have seen usage of ceramic, metallic foams, and super composite mixtures, which resulted in enhanced performance, durability and safety of the whipple shields. This work is a comprehensive coverage of the latest materials used for whipple shields, their performance characterization—both experimental and theoretical, and applications.

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Section: Numerical Simulationmentioning

confidence: 99%

“…Beyond 8 km/s, the phase change from solid to liquid/vapour constrained the analysis. In 2017, Silnikov et al [34], studied the effect of orbital debris on the fragmentation of structures under hypervelocity impact. A numerical model was developed based on the SPH technique, LS-DYNA was used for the simulations.…”

Section: Numerical Simulationmentioning

confidence: 99%

Advances in the Whipple Shield Design and Development:

Pai

Divakaran

Anand

et al. 2021

J. dynamic behavior mater.

View full text Add to dashboard Cite

show abstract

“…Based on the SPH and Euler methods, Fahrenthold et al [20] studied the effectiveness of the Grady-Kipp fragmentation model for debris cloud characteristics. Silnikov et al [21] used the SPH method to compare the debris cloud characteristics of spherical, cylindrical and cubic projectiles impacting a thin plate. Their results show that in case of the cube sharp edge impact, a debris cloud of a higher density is formed.…”

Section: Introductionmentioning

confidence: 99%

Microscopic and Macroscopic Fragmentation Characteristics under Hypervelocity Impact Based on MD and SPH Method

Xie

Xing

et al. 2021

Nanomaterials

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This work investigates the difference in the fragmentation characteristics between the microscopic and macroscopic scales under hypervelocity impact, with the simulations of Molecular Dynamics (MD) and Smoothed Particle Hydrodynamics (SPH) method. Under low shock intensity, the model at microscopic scale exhibits good penetration resistance due to the constraint of strength and surface tension. The bullet is finally embedded into the target, rather than forming a typical debris cloud at macroscopic scale. Under high shock intensity, the occurrence of unloading melting of the sample reduces the strength of the material. The material at the microscopic scale has also been completely penetrated. However, the width of the ejecta veil and external bubble of the debris cloud are narrower. In addition, the residual velocity of bullet, crater diameter and expansion angle of the debris cloud at microscopic scale are all smaller than those at macroscopic scale, especially for low-velocity conditions. The difference can be as much as two times. These characteristics indicate that the degree of conversion of kinetic energy to internal energy at the microscopic scale is much higher than that of the macroscopic results. Furthermore, the MD simulation method can further provide details of the physical characteristics at the micro-scale. As the shock intensity increases, the local melting phenomenon becomes more pronounced, accompanied by a decrease in dislocation atoms and a corresponding increase in disordered atoms. In addition, the fraction of disordered atoms is found to increase exponentially with the increasing incident kinetic energy.

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“…At present, the research on thin plate impacted by moving objects focuses more on high-speed impact conditions such as impact damage of flying objects on aircraft structure [12,13] , bullet penetration [14] , and hypervelocity impact collapse of space debris fragments on spacecraft shielding [15] , which results in large deformation or even penetration of the thin substrate. However, there are few researches on the erosion wear of the surface of thin plate substrates such as cantilever beams and fixed-fixed beams impacted by angular particles under medium and low speed conditions (5m/s~60m/s).Cantilever beam and fixed-fixed beam, as easily deformable thin plate constructs, will undergo elastic-plastic deformation and exhibit reciprocating vibration behavior after being impacted by objects, which, in essence, is the internal conversion of energy with different forms.…”

Section: Introductionmentioning

confidence: 99%

Experiment and Simulation of Erosion Mechanism and Deformation Characteristics in Al6061-T6 beam due to Rhomboid Particle Impacts

Dong

et al. 2021

Preprint

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The erosion mechanism and deformation characteristics of rhomboid-shaped particle impacting metal beam are studied. Physical experiments of rhomboid-shaped particle impacting cantilever beam and fixed-fixed beam are carried out respectively. The erosion behavior of particles and deformation characteristics of beam are captured by high-speed imaging system. Meanwhile, the numerical models of rhomboid-shaped particle impacting beam, based on FEM-SPH coupled method, are established. The effects of the geometrical parameters of the beam, the incident conditions of particle and the impact position on the elastic-plastic deformation of beam and rebound behavior of particles are further analyzed. The results show: (1) The width of cantilever beam affects its maximum deflection and deformation; (2) The threshold value of breakdown velocity is controlled by the substrate size; (3) The increment of internal energy is basically independent of the impact position; (4) The deflection value at impact position of beam is maximized under the critical impact condition.

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Numerical simulation of hypervelocity impact problem for spacecraft shielding elements

Cited by 66 publications

References 21 publications

Advances in the Whipple Shield Design and Development:

Advances in the Whipple Shield Design and Development:

Microscopic and Macroscopic Fragmentation Characteristics under Hypervelocity Impact Based on MD and SPH Method

Experiment and Simulation of Erosion Mechanism and Deformation Characteristics in Al6061-T6 beam due to Rhomboid Particle Impacts

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