A single energy-based parameter to assess protection capability of debris shields

Sekine, Hideki; Ito, Ryo; Shintate, Kyoji

doi:10.1016/j.ijimpeng.2006.01.004

Cited by 7 publications

(8 citation statements)

References 14 publications

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“…The SPH method used for the numerical analysis is a two-dimensional analysis method. The simulation conditions were elaborately explained in the research paper written by Sekine et al 14) Figure 10 shows the configuration of the debris hypervelocity impact phenomenon. As shown in this figure, the position of 0 x  was defined as the point that was orthogonally projected on the surface of the pressure wall.…”

Section: Kinetic Energy Analysis Of Debris Cloud Using the Sph Methodsmentioning

confidence: 99%

“…9,10,14) Although previous experimental studies, 12,13) have investigated the damage of debris clouds on pressure walls in the impact experiments, they focused on the derivation of empirical equations based on numerous experimental results. Their investigations did not reveal the mechanism that describes how the debris cloud creates the penetration hole of the pressure wall.…”

Section: Problem Statement and Research Objectivesmentioning

confidence: 99%

“…Their investigations did not reveal the mechanism that describes how the debris cloud creates the penetration hole of the pressure wall. On the other hand, there is a calculation study 14) of the damage of debris clouds on pressure walls but it was based only on a numerical simulation method. Thus far, experimental and simulation studies seem to have been developed independently.…”

Section: Problem Statement and Research Objectivesmentioning

confidence: 99%

“…1,2,15) There have been some studies about oblique impacts. [10][11][12][13][14][16][17][18] Ryan et al 16) derived a ballistic limit equation for the metallic opencell foam configuration in oblique impacts. They also characterized failure limits of Whipple shield made of an aluminum alloy in oblique impacts.…”

Section: Problem Statement and Research Objectivesmentioning

confidence: 99%

“…However, they were simply empirical adjustments and were not based on engineering models. Sekine et al 14) discussed the correlation between the kinetic energy of the debris cloud, and the deformation and fracture behavior of the pressure wall. Because the correlation was discussed only based on the results of a numerical simulation, the method that investigates the damage of debris clouds on pressure walls by integrating the results of impact experiments and numerical simulations has not been established.…”

Section: Introductionmentioning

confidence: 99%

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Energy Investigation into Damage Evaluation of Pressure Wall at Oblique Impacts

Makihara

Oki

Hasegawa

2016

AEROSPACE TECHNOLOGY JAPAN

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To analyze the shielding performance of Whipple bumpers, it is essential to clarify the characteristics of a debris cloud that is created owing to a hypervelocity impact. However, lesser attention has been paid on studies on the debris clouds produced by oblique impacts compared to those produced by normal impacts. We thus evaluate the damage of the pressure walls after oblique impacts. Two energy indices are proposed that can determine the destructive capability to the pressure wall. The proposed energy indices are related to the kinematic energy of the debris clouds. These energy indices are demonstrated to show the destructive capability and to uniformly evaluate the damage of the pressure wall. The spatial distributions of the kinetic energy are calculated by the smoothed particle hydrodynamics simulation. In addition to the simulation, impact experiments are conducted with two pieces of apparatus: a two-stage light gas sun and a single-stage powder gun. We discussed the correlation between the characteristics of the debris clouds at the oblique impacts and the damage of the pressure walls.

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Section: Kinetic Energy Analysis Of Debris Cloud Using the Sph Methodsmentioning

confidence: 99%

Section: Problem Statement and Research Objectivesmentioning

confidence: 99%

Section: Problem Statement and Research Objectivesmentioning

confidence: 99%

Section: Problem Statement and Research Objectivesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Energy Investigation into Damage Evaluation of Pressure Wall at Oblique Impacts

Makihara

Oki

Hasegawa

2016

AEROSPACE TECHNOLOGY JAPAN

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Optimal design of a composite space shield based on numerical simulations

2015

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In this study, optimal design of a stuffed Whipple shield is proposed by using numerical simulations and new penetration criterion. The target model was selected based on the shield model used in the Columbus module of the international space station. Because experimental results can be obtained only in the low velocity region below 7 km/s, it is required to derive the Ballistic limit curve (BLC) in the high velocity region above 7 km/s by numerical simulation. AUTODYN-2D, the commercial hydro-code package, was used to simulate the nonlinear transient analysis for the hypervelocity impact. The Smoothed particle hydrodynamics (SPH) method was applied to projectile and bumper modeling to represent the debris cloud generated after the impact. Numerical simulation model and selected material properties were validated through a quantitative comparison between numerical and experimental results. A new criterion to determine whether the penetration occurs or not is proposed from kinetic energy analysis by numerical simulation in the velocity region over 7 km/s. The parameter optimization process was performed to improve the protection ability at a specific condition through the Design of experiment (DOE) method and the Response surface methodology (RSM). The performance of the proposed optimal design was numerically verified.

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Element fracture technique for hypervelocity impact simulation

Zhang

Liu

et al. 2015

Advances in Space Research

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A single energy-based parameter to assess protection capability of debris shields

Cited by 7 publications

References 14 publications

Energy Investigation into Damage Evaluation of Pressure Wall at Oblique Impacts

Energy Investigation into Damage Evaluation of Pressure Wall at Oblique Impacts

Optimal design of a composite space shield based on numerical simulations

Element fracture technique for hypervelocity impact simulation

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