Accession Number : AD0708481

Title :   STRESSES IN SHALLOW SPHERICAL SHELLS OF COMPOSITE MATERIALS SUBJECTED TO LOCALIZED LOADS.

Descriptive Note : Scientific rept.,

Corporate Author : DELAWARE UNIV NEWARK DEPT OF MECHANICAL AND AEROSPACE ENGINEERING

Personal Author(s) : Kliger,Howard S. ; Vinson,Jack R.

Report Date : APR 1970

Pagination or Media Count : 200

Abstract : Methods of analysis are developed to provide the stresses (both bending and membrane) and deformations in specially orthotropic shallow and nonshallow spherical shells of revolution subjected to localized loads at the apex. An accurate shell theory is employed including effects of circular orthotropy and transverse shear deformation. The governing equations are reduced to a single, second order complex differential equation. Solutions are obrained in terms of modified Bessel functions of non-integer order and complex argument. These functions are transformed into a set of infinite series, and upon proper non- dimensionalization, these series are shown to be uniformly and very rapidly convergent. Expressions are obtained for bending, membrane and shear stresses as well as lateral and inplane deflections everywhere in the shell. Comparisons and design curves are obtained for large variations in orthotropy and matrix shear properties which cover almost all known composite materials. Various boundary conditions, degrees of shallowness, and loading conditions are also systematically explored and reported. (Author, modified-PL)

Descriptors :   (*SHELLS(STRUCTURAL FORMS), COMPOSITE MATERIALS), (*COMPOSITE MATERIALS, STRESSES), SHEAR STRESSES, STRAIN(MECHANICS), LOADS(FORCES), SANDWICH CONSTRUCTION, ELASTIC PROPERTIES, DEFLECTION, LOAD DISTRIBUTION, NUMERICAL ANALYSIS, MODULUS OF ELASTICITY, SPHERES

Subject Categories : Structural Engineering and Building Technology
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE