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Two-dimensional high temperature optical strain measurement system, phase 2
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Lant, Christian T. |
| Copyright Year | 1989 |
| Description | A laser speckle strain measurement system with two-dimensional measurement capabilities has been built and tested for high temperature applications. The 1st and 2nd principle strains at a point on a specimen are calculated from three components of one-dimensional strain. Strain components are detected by cross-correlating reference and shifted speckle patterns recorded before and after straining the specimen. Speckle patterns are recorded by a linear photodiode array camera. Accurate strains have been measured at temperatures up to 650 C. Stable speckle correlations and linear stress-strain relations have been demonstrated up to 750 C. The resolution of the system is 15 microstrains, with a gauge length less than 1 mm. |
| File Size | 4351529 |
| Page Count | 22 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19890016847 |
| Archival Resource Key | ark:/13960/t2h759x23 |
| Language | English |
| Publisher Date | 1989-07-01 |
| Access Restriction | Open |
| Subject Keyword | Laser Outputs Stress-strain Relationships Cross Correlation Speckle Patterns Strain Gages Strain Measurement High Temperature Environments Optical Measuring Instruments Displacement 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 |
