Strain measurements in tubes during rapid transient heating |
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| Authors: | J Frisch J E Morris |
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| Institution: | 1. University of California, Berkeley, Calif.
2. Autonetics Co., Anaheim, Calif.
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| Abstract: | A measuring apparatus using reluctance-type displacement transducers was successfully used for measuring radial thermal strains in 1-in.-diam × 8-in.-long thin-walled tubes of molybdenum, tantalum and 304 stainless steel. Wall-temperature rates of approximately 300° F/sec were accomplished by rapid heating with a plasma jet and strains at temperatures up to 2500° F were recorded. Excellent agreement between experimental results and a theoretical solution based on temperature profiles was found for temperatures to 2000° F. |
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