Accession Number : AD0822899

Title :   CONSIDERATIONS IN THE DESIGN OF SUPPORTS FOR PANELS IN FATIGUE TESTS.

Descriptive Note : Final rept. May 66-Apr 67,

Corporate Author : BOLT BERANEK AND NEWMAN INC CAMBRIDGE MA

Personal Author(s) : Ungar, Eric E. ; Lee, Kyung S.

Report Date : SEP 1967

Pagination or Media Count : 137

Abstract : The question is studied of how a test panel, which represents one of an assemblage of panels in a prototype (e.g., an aircraft fuselage), should be supported, so that a fatigue test of that panel yields the same result as a test of a complete prototype. The recommendation is developed that one should test the panel of interest at the center of a three-by-three panel array, rather than by itself, in order to obtain realistic representations of the boundary stiffness, energy dissipation, and energy transport properties. Considerations in obtaining practical supports that provide approximate free, clamped, and simply supported boundary conditions are investigated and reduced to design equations, graphs, and recommendations. Extensive analyses of the effects of boundary conditions on maximum stresses in resonantly and in randomly vibrating plates and cylindrical shells are appended, as are the results of experiments and analyses concerned with the determination of damping and energy transport in multipanel structures. (Author)

Descriptors :   (*PANELS, FATIGUE(MECHANICS)), ENERGY, TRANSPORT PROPERTIES, STRESSES, VIBRATION, SOUND, LOADS(FORCES), MATHEMATICAL ANALYSIS, EQUATIONS, NOISE, EXCITATION.

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE