ISO 11227:2012/Amd.1:2021 Space systems — Test procedure to evaluate spacecraft material ejecta upon hypervelocity impact
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Space systems — Test procedure to evaluate spacecraft material ejecta upon hypervelocity impact是ISO发布的ISO标准，适用于全球范围。标准截图
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标准文档类型为Space systems — Test procedure to evaluate spacecraft material ejecta upon hypervelocity impact高清PDF版本（文字版），标准文档内可进行搜索，可以复制原文，可粘贴。标准部分原文
Space systems — Test procedure to evaluate spacecraft material ejecta upon hypervelocity impact
AMENDMENT 1: Oblique impacts and Annex C update
Annex C, second paragraph
Replace the last sentence with the following:
[15]
Recent experimental set-up and preliminary results are described by Y. Fujimura et al. and by [21]
A. Francesconi et al. .
Annex C, b), first paragraph
Replace the last sentence with the following:
[9]
A possible set-up, such as the one used at the Kyushu Institute of Technology is shown in Figures C.1 to C.4.
Annex C, b), second paragraph
Replace the last sentence with the following:
[16]
As evidenced by K. Sugahara , it is difficult and time-consuming to identify impact features smaller than 25 µm in diameter.
Annex C, c), second paragraph
Replace the text with the following:
The value given by Cour-Palais, C = 1,28 (see References [17] and [18]) can be chosen for use in this document. As an example, the D/d ratio for an ejecta velocity of 1 km/s is close to 1,3, whereas it is close to 3,9 for an ejecta velocity of 5 km/s.
Annex C, c), fourth paragraph
Replace the text with the following:
The size of the ejecta can also be derived from the size of perforations obtained on a thin witness foil. In this case, the size of the holes is the same as the size of the particles, when the foil is thin compared to the size of the ejecta (see Reference [19]).
Annex C, d), first paragraph
Replace the first sentence with the following:
Recovery of intact fragments is possible using, instead of metal witness plates, a low-density material such as silica aerogel (see Figure C.5), or a soft material such as foam or cardboard.
Annex C, e), first paragraph
Replace the first sentence with the following:
The velocity (and also the spatial distribution) of the ejecta can be measured with a high-speed video camera, as shown on Figure C.6.
Annex C
Add the following two figures after Figure C.2 and renumber the subsequent figures:
Key
1 target
2 witness plate (top)
3 witness plate (front)
4 witness plate (back)
NOTE The front witness plate can be removed when the front ejecta is negligible.
Figure C.3 — Sketch of target and witness plate assembly for oblique impact
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