Accession Number : AD0763732

Title :   Application of Optimality Criterion to Fiber-Reinforced Composites.

Descriptive Note : Technical rept.,

Corporate Author : AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Khot,N. S. ; Venkayya,V. B. ; Johnson,C. D. ; Tischler,V. A.

Report Date : MAY 1973

Pagination or Media Count : 54

Abstract : AYYA,V. B. ;Johnson,C. D. ;Tischler,V. A. ;AFFDL-TR-73-6(*composite materials, optimization), (*airframes, composite materials), aluminum, boron, epoxy resins, fibers, alignment, wings, panels, weight, numerical analysis, laminatesfinite element analysis, *fiber compositesThis report presents an efficient optimization method, based on an optimality criterion and a numerical search, for the minimum weight design of structures made from boron/epoxy composite materials. A RECURRENCE RELATION IS DERIVED AND IS INCORPORATED INTO THE COMPUTER PROGRAM BASED ON THE DISPLACEMENT METHOD OF FINITE ELEMENT ANALYSIS. The optimum design procedure takes into consideration multiple loading conditions and displacement constraints on the structure. Several sample problems consisting of both isotropic and composite elements are solved and the results are presented. (Author, modified-PL)

Descriptors :   (*COMPOSITE MATERIALS, OPTIMIZATION), (*AIRFRAMES, COMPOSITE MATERIALS), ALUMINUM, BORON, EPOXY RESINS, FIBERS, ALIGNMENT, WINGS, PANELS, WEIGHT, NUMERICAL ANALYSIS, LAMINATES

Subject Categories : Aircraft
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE