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Electro optical system to measure strains at high temperature (Document No: 19920024452)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Sciammarella, Cesar A. |
| Copyright Year | 1991 |
| Description | The measurement of strains at temperatures of the order of 1000 C has become a very important field of research. Technological advances in areas such as the analysis of high speed aircraft structures and high efficiency thermal engines require operational temperatures of this order of magnitude. Current techniques for the measurement of strains, such as electrical strain gages, are at the limit of their useful range and new methods need to be developed. Optical techniques are very attractive in this type of application because of their noncontacting nature. Holography is of particular interest because a minimal preparation of the surfaces is required. Optoelectronics holography is specially suited for this type of application, from the point of view of industrial use. There are a number of technical problems that need to be overcome to measure strains using holographic interferometry at high temperatures. Some of these problems are discussed, and solutions are given. A specimen instrumented with high temperature strains gages is used to compare the results of both technologies. |
| File Size | 1847601 |
| Page Count | 59 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19920024452 |
| Archival Resource Key | ark:/13960/t8pc7ws92 |
| Language | English |
| Publisher Date | 1991-12-31 |
| Access Restriction | Open |
| Subject Keyword | Holography Optoelectronic Devices Strain Gages High Temperature Research Aircraft Engines High Temperature Interferometers Stress-strain Relationships Temperature Effects Strain Measurement Holographic Interferometry Electro-optics Aircraft Structures Thermal Stresses Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
