ENGINEERING RESEARCH INSTITUTE UNIVERSITY OF MICHIGAN ANN ARBOR Progress Report No. 2 RESEARCH AND DEVELOPMENT ON METHODS FOR STRUCTURAL TESTING OF HIGH SPEED AIRCRAFT AND MISSILES 1 August, 1954, to 30 September, 1954 H. F. ALLEN Project 2250 WRIGHT AIR DEVELOPMENT CENTER, U.S. AIR FORCE CONTRACT AF 33(616)-24537 PROJECT NO. 54-610A-140, RDO NO. R451-377 SR-lg October, 1954

ENGINEERING RESEARCH INSTITUTE * UNIVERSITY OF MICHIGAN RESEARCH AND DEVELOPMENT ON METHODS FOR STRUCTURAL TESTING OF HIGH SPEED AIRCRAFT AND MISSILES PURPOSE This project covers theoretical analyses and laboratory tests to establish relationships which may exist between room-temperature tests and various types of elevated temperature tests of aircraft structures and to develop means of producing rapid temperature changes in aircraft structural components. STATUS ilThe existing oven in the structures laboratory of the Aeronautical Engineering Department has been dismantled and is being modified for the purpose of testing a rectangular aluminum alloy box beam. The support jig has been designed, most of the parts have been fabricated. and assembly has been started. WORK ACCOMPLISHED Vacation. schedules during the month of August have limited the amount of work accomplished during the period covered by this report. The high-temperature structural-testing oven which was constructed in connection with a prior contract has been partially disassembled. and the steel jig for mounting the test specimens was completely dismantled. A new jig for mounting the 4h" x 11" aluminum alloy box beam has been designed and is under construction. Most of the parts have been fabricated in the shop and -. ——.... —--- 1

ENGINEERING RESEARCH INSTITUTE * UNIVERSITY OF MICHIGAN erection of the jig has been started. The box beam will be tested at room temperature as soon as the jig is complete. The results of this test will be used as the basis for a choice of the type of specimen to be used for the entire series of tests. ________...__________________________ 2 -

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