[Ads-l] fail safe, antedating 1944?

Mon Jan 25 09:59:18 UTC 2021

The 1944 date might be inaccurate. Here is a link to a document in
Google Books which suggests that the report mentioning "'fail-safe'
fatigue life" is actually dated 1964. The research contract was from
September 1, 1962 to January 31, 1964.

https://books.google.com/books?id=mG5NAQAAMAAJ&q=%22safe+fatigue%22#v=snippet&

[Begin excerpt]
Columbia Univ., New York.
RANDOM FATIGUE FAILURE OF A MULTIPLE LOAD PATH REDUNDANT STRUCTURE.
Rept. for 1 Sep 62-31 Jan 64,
by A. S. Heller, R. A. Heller, and A. M. Freudenthal.
1964, 39p
Contract AF33 616 7042, Proj. 2 8 7351, Task 735106
ML TDR64 160
Unclassified report
. . .
The method allows computation of a median 'fail-safe' fatigue life of
the structure as well as the consecutive failure of individual
members.
[End excerpt]

Garson

On Mon, Jan 25, 2021 at 4:08 AM Stephen Goranson <goranson at duke.edu> wrote:
>
> 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
>
> ------------------------------------------------------------
> The American Dialect Society - http://www.americandialect.org

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The American Dialect Society - http://www.americandialect.org