DEVELOPMENT OF A COMBINATION SPECTRA LOADING FATIGUE AND DYNAMIC HEATING SYSTEM FOR DETERMINATION OF COMPLEX LOAD-TEMPERATURETIME DESIGN DATA OF MATERIALS.
Rept. for 15 Apr 61-15 Oct 63,
RESEARCH INC HOPKINS MINN
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This program involved the modification of a standard dynamic loading test machine, the addition of a high rate heating oven and the development of an automatic programmer for both items. This test equipment is capable of programming slowly varying static loads, dynamic loads, and temperature, automatically through the use of arbitrary programs drawn on a curve following programmer. Three programs are included one for the upper load, one for the lower load and a third for specimen temperature. The machine is capable of operating at speeds up to 5000 cpm, and is capable of applying one cycle at a time and holding a load during programmed temperature fluctuations. The dual-elliptical-reflector infrared furnace is capable of applying specimen transient temperatures up to 3000F and continuous temperature of 1800F. The maximum combined load that can be applied to a test specimen is 13,227 pounds tension or compression. The maximum static load is 7,936 pounds. The maximum high frequency load is 551.15 pounds to 6613 pounds and the maximum slow speed force up to 40 cpm is 11, 023 pounds. A detailed description of the test equipment and its operation are given in this report. Author