| タイトル | Fracture characteristics of balloon films |
| 本文（外部サイト） | http://hdl.handle.net/2060/19890011728 |
| 著者（英） | Portanova, Marc A. |
| 著者所属（英） | PRC Kentron, Inc. |
| 発行日 | 1989-01-01 |
| 言語 | eng |
| 内容記述 | An attempt was made to determine the failure modes of high altitude scientific balloons through an investigation of the fracture characteristics of the thin polyethylene films. Two films were the subject of the evaluation, Winzen Int.'s Stratafilm SF-85 and Raven Industries' Astro-E. Research began with an investigation of the film's cold brittleness point and it's effect on the ultimate strength and elasticity of the polyethylene film. A series of preliminary investigations were conducted to develop an understanding of the material characteristics. The primary focus of this investigation was on the notch sensitivity of the films. Simple stress strain tests were also conducted to enable analysis employing fracture toughness parameters. Studies were conducted on both film types at 23 C (room temperature), -60 C, -90 C, and -120 C. |
| NASA分類 | NONMETALLIC MATERIALS |
| レポートNO | 89N21099
NAS 1.26:181686
NASA-CR-181686 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/142609 |
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