Flat sheet metal girder with very thin metal web
Part 2 : Sheet metal girders with spars resistant to bending - oblique uprights - stiffness
by Wagner, Herbert
Noting that the stiffness of the girder increases very rapidly as Beta increases, the result can be summed up as follows: When the cross stress preponderates in one direction and when the web plate is to be given the dimensions commensurate to its stresses, it is advisable (regardless of any ensuing structural difficulties) to set the uprights at about Beta = 120 degrees, thereby lowering the weight of the plate wall 15 percent (in contrast to Beta = 90 degrees), and raising the stiffness 55 percent. But, when the cross stresses alternate and are approximately of the same intensity in both directions, or, if the web plate thickness is determined by other structural reasons, then Beta = 90 degrees should be chosen.
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Flat sheet metal girder with very thin metal web: Part 2 : Sheet metal girders with spars resistant to bending - oblique uprights - stiffness
1931, National Advisory Committee for Aeronautics
in English
1680156594 9781680156591
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2
Flat sheet metal girder with very thin metal web: Part 3 : Sheet metal girders with spars resistant to bending - the stress in uprights - diagonal tension fields
1931, National Advisory Committee for Aeronautics
in English
1680156586 9781680156584
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Book Details
Edition Notes
"February, 1931."
NACA TM No. 605.
Translated from Zeitschrift fur Flugtechnik und Motorluftschiffahrt. Vol. 20, No. 9, May 14, No. 10, May 28, and No. 11, June 14, 1929, by the National Advisory Committee for Aeronautics.
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This report continues the work presented in NACA-TM 605 and expands the scope to include the change in specific number of wrinkles from direction x to z, so that b and f become variable in direction z. Moreover, it seems likely that b and f increase from the edge toward the center if the sheet is infinitely thin.
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