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Multiple-load-path redundant structures have been utilized in “fail-safe” design applications for a long time without a thorough investigation into the statistical nature of their failure. Experiments conducted at the Institute for the Study of Fatigue and Reliability, of Columbia University, on a model ten-member redundant structure subjected to constant-amplitude loads have been analyzed, and the statistical distribution of consecutive failures was determined. The experimental results are compared with various theoretical computations which were found to be conservative.
fatigue (materials), redundant structures, statically indeterminant structures, probability, aluminum alloys
Heller, R. A.
Deputy director, Columbia University, New York, N. Y.
Donat, R. C.
Research assistant, Columbia University, New York, N. Y.