A Study of Damage on Al-Mesh Bumper by Hypervelocity Impact of Al-Spheres
- Paper number
IAC-11,A6,3,23,x9917
- Author
Dr. Gongshun Guan, Harbin Institute of Technology, China
- Coauthor
Mrs. Weiqiu Xu, Heilongjiang Provincial Hospital, China
- Year
2011
- Abstract
Space debris is a recognized threat for any space mission. Hypervelocity impacts on spacecraft in low earth orbit by meteoroids and space debris can damage flight-critical systems, which can in turn lead to catastrophic failure of the spacecraft. Metallic mesh bumper is a breakthrough to traditional principle of making effective meteorite bumper constructed from contiguous metallic sheet material. In this paper, the hypervelocity impact characteristics of 5052 aluminum alloy mesh bumper were studied through hypervelocity impact on aluminum mesh/plate dual-bumper shields The fragmentation and dispersal of hypervelocity particle against mesh bumpers varying with material and specification were analyzed. At similar impact velocity, hypervelocity impact characteristics comparison with aluminum sheet bumpers of equal areal mass was thrust. Their hypervelocity damage characteristics difference was investigated. And assess of hypervelocity impact protection performance of mesh/plate dual-bumper shields was acquired. Based on traditional ballistic limit curve, optimum design and experimental assessment was made of hypervelocity impact protection performance of mesh/plate dual-bumper shields of different mesh specification. The experiments used 3.97mm and 6.35mm diameter spherical projectiles at velocity 2.5km/s~5.0km/s and the shields were formed by combination of aluminum plates and 5052 aluminum mesh of three kinds of wire diameter and three kinds of aluminum wire mesh spacing, and mesh is located behind the plate. Ballistic limit of different mesh shields in the experimental speed range was acquired. Compared with aluminum sheet dual-bumper shields of equal areal mass, acquired the best mesh specification that has a superior protection performance to sheet bumper of equal areal mass. Accomplished geometric modeling of meshes used in experiment. Hypervelocity normal impact behavior of two kinds of mesh shields was obtained by numerical simulation. Comparing with experiment results, good agreement appeared. Hypervelocity normal impact debris distribution of mesh bumper was investigated by numerical simulation. Obtained influence of different impact point on morphology and energy characteristics of debris cloud.
- Abstract document
- Manuscript document
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