Effect Of Using Small-sized Bumper On Whipple Shield In High Velocity Impact Tests
- Paper number
IAC-07-A6.I.13
- Author
Mr. Yue Ha, Harbin Institute of Technology, China
- Coauthor
Dr. Gongshun Guan, Harbin Institute of Technology, China
- Coauthor
Prof. Baojun Pang, Harbin Institute of Technology, China
- Coauthor
Dr. Wei Zhang, Harbin Institute of Technology, China
- Year
2007
- Abstract
In order to observe the phenomena of high-velocity impact damage carefully, some observation instruments, such as flash x-ray apparatus, high speed video equipment and high speed digital camera, are used to take the images of debris clouds and so on. The lateral size of the bumper and the rear wall are usually same in high velocity impact tests. If the bumper is smaller than rear wall in lateral size on Whipple shield in high velocity impact tests , it will occupies smaller space and more part of rear wall will exposure. So the observation instruments can be placed suitably and the efficiency of the observation can be improved too. The aim of this study is to analyze the effect of bumper size on the damage to Whipple shield and the feasibility of using small-sized bumper on Whipple shield in high velocity impact tests. All tests were performed by using the non-powder two-stage light gas gun facilities at Hypervelocity Impact Research Center in Harbin Institute of Technology. The configuration of Whipple shields consisted of 1 mm thickness bumpers and 3 mm thickness rear wall with 10 cm space between the bumper and the rear wall. The bumpers were AL2A12 (AL2024) square plates with different sizes such as 8, 12, 16 and 20 cm. The rear wall was 20cm AL5A06 (AL5056) square plate. All tests were performed by shooting aluminum projectile 4 mm in diameter at the velocity ranging from 1.45 to 1.71 km/s. Test results showed that the mean velocity of 6 projectiles impacting on the Whipple shields was independent on bumper size when the perforation percentage of rear wall was over 80. It was found that the diameters of perforation holes both in front and in back of bumper were independent on bumper size too. When the bumper lateral size changes within a decided range,protecting property of Whipple shield will not change.
- Abstract document
- Manuscript document
IAC-07-A6.I.13.pdf (🔒 authorized access only).
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