Flat sheet metal girder with very thin metal web
Wagner, Herbert
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Sheet-Metal Contraintes (Mécanique) Stress
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.