RESEARCH ON STRUCTURAL FATIGUE TESTING.
Annual summary rept., no. 1, 15 Sep 60-14 Sep 61,
NATIONAL AERO- AND ASTRONAUTICAL RESEARCH INST AMSTERDAM (NETHERLANDS)
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The report deals with a research program for random-load and program fatigue tests. The scope of the investigation is to ascertain the validity of a load spectrum simplification procedure when applied to a structure representative of a modern aircraft design. For this purpose a number of F-27 wing center-section tension skins will be subjected to random-load and to program fatigue tests. The first phase of the program consists of the design and manufacture of a test rig for mounting the tension skins and of a hydraulic loading system with servo-apparatus to apply the desired random and programmed load sequences. The first phase also includes static testing of the specimen in order to check the stress distribution in the tension skin. The report gives a brief description of the test set-up, the loading system, and the servo-apparatus. Author