Preliminary Development of an Interferometric Strain Gage for Use on Nosetip Materials Subjected to Thermal Shock.
Final technical rept. 1 May 75-31 Mar 76,
MICHIGAN STATE UNIV EAST LANSING DIV OF ENGINEERING RESEARCH
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This report describes the results of a limited effort to extend the capabilities of the interferometric strain gage ISG to high temperatures at high heating rates on graphite and tungsten. The specified temperature limit was 2500 F, which was to be reached in a time of approximately two seconds. Experiments were conducted using a specially constructed furnace at Michigan State University to evaluate various facets of the technique, and the high heating rate experiments were conducted at Southern Research Institute. The ISG is based on the motion of laser-generated interference patterns from the specimen surface. If suitable reflecting surfaces can be made that will withstand the high temperature environment, then the technique has great potential. Details of the techniques and instrumentation, as well as descriptions of the various evaluative experiments, are included in this report.
- Ceramics, Refractories and Glass
- Test Facilities, Equipment and Methods