[Ads-l] fail safe, antedating 1944?

[Stephen Goranson]

RANDOM FATIGUE FAILURE OF A MULTIPLE LOAD PATH REDUNDANT STRUCTURE.

COLUMBIA UNIV NEW YORK;  A S HELLER;  R A Heller;  A M Freudenthal

1944
English[Internet Resource] Internet Resource[Archival Material] Archival Material

Abstract: The object of the investigation is the determination of the fatigue life of a multiple load path redundant structure consisting of geometrically similar members having statistically distributed initial strengths and subjected to randomized fatigue loads derived from an exponentially distributed gust spectrum. A modified linear damage rule and failure condition based on ultimate carrying capacity is being used. The method allows computation of a median 'fail-safe' fatigue life of the structure as well as the consecutive failure of individual members. Three aircraft structural materials, 7075-T6 and 2024-T4 aluminum as well as SAE 4340 steel have been investigated. Fatigue lives shorter than those calculated using the linear damage rule are obtained. (Author)

SG

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