Accession Number : AD0091378


Title :   THE ACCURACY OF THE SUBSTITUTE-STRINGER APPROACH FOR DETERMINING THE BENDING FREQUENCIES OF MULTISTRINGER BOX BEAMS


Descriptive Note : Tehcnial note


Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMIN LANGLEY RESEARCH CENTER HAMPTON VA


Personal Author(s) : Davenport, William W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/091378.pdf


Report Date : Apr 1956


Pagination or Media Count : 34


Abstract : The accuracy of the substitute-stringer approach for including the effects of shear lag in the calculation of the transverse modes and frequencies of multistringer box beams is investigated. Box beam, the covers of which consist of normal-stress-carrying stringers on sheets which carry not only shear but also normal stress, are analyzed exactly. Frequencies of beams with various numbers of stringers, obtained by means of this exact analysis, serve to determine the possible accuracy of the frequencies obtained by the substitute-stringer approach.


Descriptors :   *BOX BEAMS , SHEAR PROPERTIES , STRESSES , VIBRATION , BENDING , DETERMINATION


Subject Categories : Mechanics
      Military Aircraft Operations


Distribution Statement : APPROVED FOR PUBLIC RELEASE