Accession Number : ADA006157


Title :   Analytical Investigation of Medium STOL Transport Structural Concepts. Volume II5 Isograd Fuselage Study.


Descriptive Note : Final technical rept. 15 Mar 73-24 Jun 74,


Corporate Author : DOUGLAS AIRCRAFT CO LONG BEACH CALIF


Personal Author(s) : Adkisson,R E ; Deneff,G V ; Alperin,B J ; Zwart,R L ; Platte,M L


Report Date : Aug 1974


Pagination or Media Count : 118


Abstract : Results of a study program to evaluate application of the isogrid structure concept to a medium STOL transport aircraft are presented. Isogrid is an integrally stiffened panel concept incorporating a triangular arrangement of the stiffening material which has been used successfully on space vehicle structure. The fuselage shell structure of the projected C-15 production airplane is used as the study (and baseline component. The isogrid concept is evaluated for structural concepts are based on a common set of requirements for ultimate strength, fatigue, and damage tolerance. Because of generally lower stress levels and a general absence of rivet and bolt holes in basis isogrid structure, fatigue and damage tolerance are of reduced criticality relative to baseline structure.


Descriptors :   *FUSELAGES , *STRUCTURAL ENGINEERING , *SHORT TAKEOFF AIRCRAFT , COST ANALYSIS , STRUCTURAL PROPERTIES , STIFFENING , FABRICATION , CONFIGURATIONS


Subject Categories : V/STOL


Distribution Statement : APPROVED FOR PUBLIC RELEASE