Tests of a stress-carrying door in compression

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Material Information

Title:
Tests of a stress-carrying door in compression
Series Title:
NACA WR
Alternate Title:
NACA wartime reports
Physical Description:
2 p., 4 leaves : ill. ; 28 cm.
Language:
English
Creator:
Gottlieb, Robert
Langley Aeronautical Laboratory
United States -- National Advisory Committee for Aeronautics
Publisher:
Langley Memorial Aeronautical Laboratory
Place of Publication:
Langley Field, VA
Publication Date:

Subjects

Subjects / Keywords:
Airplanes -- Design and construction   ( lcsh )
Aerodynamics -- Research   ( lcsh )
Genre:
federal government publication   ( marcgt )
bibliography   ( marcgt )
technical report   ( marcgt )
non-fiction   ( marcgt )

Notes

Bibliography:
Includes bibliographic reference (p. 2).
Statement of Responsibility:
by Robert Gottlieb.
General Note:
"Originally issued September 1942 as Restricted Bulletin."
General Note:
"NACA WARTIME REPORTS are reprints of papers originally issued to provide rapid distribution of advance research results to an authorized group requiring them for the war effort. They were previously held under a security status but are now unclassified. Some of these reports were not technically edited. All have been reproduced without change in order to expedite general distribution."

Record Information

Source Institution:
University of Florida
Rights Management:
All applicable rights reserved by the source institution and holding location.
Resource Identifier:
aleph - 003806501
oclc - 124082064
System ID:
AA00009453:00001


This item is only available as the following downloads:


Full Text

,VACAUY 3


NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS






WARTIM'DE REPORT
ORIGINALLY ISSUED
September 1942 as
Restricted Bulletin

TESTS OF A STRESS-CARRYING DOOR IN COMPRESSION

By Robert Gottlieb

Langley Memorial Aeronautical Laboratory
Langley Field, Va.


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NACA WARTIME REPORTS are reprints of papers originally Issued to provide rapid distribution of
advance research results to an authorized group requiring them for the war effort. They were pre-
viously held under a security status but are now unclassified. Some of these reports were not tech-
nically edited. All have been reproduced without change In order to expedite general distribution.


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Digitized by Ihe Inlernel Archive
in 2011 With ILunding from
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NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS


RESTRICTED BULLETIN


TESTS OF A STRESS-CARRYING DOOR IN COMPRESSION

By Robert Gottlieb


The results of torsional tests on a monocoque box
containing a stress-carrying door were presented in ref-
erence 1. The present p-per gives the results of bending
tests on the same box with the door on the compression
side. The details of the box and the location of the ap-
plied forces are shown in figure 1. Outside and inside
views of the stress-carr;:ing door are shown in figure 2.

Vertical loads of 1OCO, 2COO, 3000, and 4000 pounds
were applied at the free end of the box. The chordwise
stress distribution at station 27.75 (see fig. 1) is
shown in figure 3 for the case of cut-out, cut-out with
door, and no cut-out.

The effectiveness of a stress-carrying door depends
on the intended function of the door. If the function
of the door is considered to be that of reducing the
maximum compressive stresses around the cut-out, a meas-
ure of the effectiveness of the door is the ratio of the
stresses a/b. (See fij. 3.) If the function of the
door is considered to be that of carrying load from one
end of the cut-out to the other, a measure of the effec-
tiveness of the door is the ratio of the areas

double-shaded area
entire shaded area

The entire shaded Prea represents the lo-d-carrying ca-
pacity that w-s lost wenr. the cut-out was made; the
double-shaded area snows the arLount of this load-carrying
capacity that was recovered when the door was placed in
the cut-out.

In figure 4 thee two measurec of the effectiveness
of the door in compression are plotted against the applied
load at the tic of the box. These curves indicate that
the door becomes effective in carrying loads across the
cut-out at a load of approvim-'tely, 1OO pounds and that
it becomes effective in reducing stresses at a load of














approximately 2300 pounds. The effectiveness increases
raiily as Lreater loads are anplied. The door is inef-
fective at low loads because of the clearance provided
between the door end door frame to allow easy removal of
the door at zero loal.. Before the door can become ef-
fective in comnrFssion, thp material on each side must be
deformed sufficiently to td-ke up this clperance.



Langley Mer.ori-l terorautical Laboratory,
7ational Advisor:. Committee for n.eronautics,
Langley Field, Va.



Ri .F .' RE I. CE


1. Gottlie', Robert: Taqt of a Stress-3arrying Door in
Shear. 'T.CA R.B., Aug. 1S42.




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Fig. 4


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Figur 4.- Effectivenesgs of door.







UNIVERSITY OF FLORIDA

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