| タイトル | Optical Strain Measurement of an Inflated Cylinder using Photogrammetry with Application to Scientific Balloons |
| 本文（外部サイト） | http://hdl.handle.net/2060/20040066090 |
| 著者（英） | Black, Jonathan T.; Baginski, Frank; Sterling, Jerry; Steadman, Eric; Blandino, Joseph R.; Pappa, Richard S. |
| 著者所属（英） | NASA Wallops Flight Center |
| 発行日 | 2004-04-01 |
| 言語 | eng |
| 内容記述 | A study is presented using photogrammetry to measure the biaxial strain in an inflated cylinder. Two cylinders constructed from polyethylene and each approximately 222 mm in diameter and 930 mm in length were studied. The first had a 0.038 mm wall thickness while the second had a 0.02 mm wall thickness. The cylinders were inflated to a maximum pressure of 1379 Pa. The strain was determined from data collected from 60 retro-reflective targets arranged in a 12 x 5 grid. The uncertainty of the measurement system was determined to be 0.08, 0.04 and 0.06 mm in the x, y, and z directions respectively. The hoop and meridional strains determined from displacement data were compared to values obtained from a finite element analysis of a related proxy problem. The predicted hoop strains showed good agreement over the entire range of pressures while the meridional strains showed good agreement at the lower pressures. |
| NASA分類 | Aeronautics (General) |
| レポートNO | AIAA Paper 2004-1500 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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