Sonic Fatigue in Combined Environment

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Report Number: AFFDL TR 66-7
Author(s): Ballantine, John R., Plumblee, Harry E., Schneider, Cecil W.
Corporate Author(s): Lockheed-Georgia Company
Laboratory: Air Force Flight Dynamics Laboratory
Date of Publication: 1966-05
Pages: 164
Contract: AF 33(615)-1481
DoD Project: 1471
DoD Task: 147101
Identifier: AD0637506

Research on sonic fatigue in combined environment is described. Emphasis is placed on determining the effects of structural curvature, low- frequency vibratory loads, and heat, both singly and collectively, on sonic fatigue. The analytical and experimental investigation is presented in two major phases: (1) An investigation of simple structural panels to determine the effect of curvature and heat cycling schemes on dynamic response and fatigue. (2) An investigation to determine the effects of high-intensity sound, heat, and low-frequency vibratory loads on curved titanium-faced honeycomb sandwich panels.

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