Accession Number : AD0856452

Title :   Discrete-Element Static Analysis of Bonded, Double-Layer, Branched, Thin Shells of Revolution. Part 1: Analysis and Evaluation.

Descriptive Note : Technical rept.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE AEROELASTIC AND STRUCTURES RESEARCH LAB

Personal Author(s) : Kotanchik, James J.

Report Date : MAY 1968

Pagination or Media Count : 218

Abstract : The methods of discrete-element analysis are applied to the solution of arbitrary shells of revolution having two layers joined by a soft bond; the shell is idealized as a series of frusta with curved meridians, joined at the nodal circles. The displacement assumptions for the soft-bonded two-layer discrete element permit the sliding of the upper and lower layers with respect to each other, but the normal displacement of the upper and lower layers is assumed to be the same. The asymmetric loading problem is handled through a Fourier expansion of the loads and displacements. Numerical results for various shells of revolution for both axisymmetric and asymmetric mechanical and thermal loadings have been obtained to exercise various features and options of the computer program SABOR 5. These results are compared with existing solutions and good correlation is found. The SABOR 5 program can be used for the static analysis of variable-thickness shells of revolution composed of soft-bonded double-layers, single layers, or branched-shell combinations thereof, while accounting for isotropic or general skew orthotropic material properties and for arbitrary (axisymmetric and/or asymmetric) mechanical and/or thermal loads.

Descriptors :   (*SHELLS(STRUCTURAL FORMS), COMPOSITE MATERIALS), (*STRUCTURAL PROPERTIES, NUMERICAL ANALYSIS), BODIES OF REVOLUTION, BLUNT BODIES, COMPUTER PROGRAMMING, STRESSES, THERMAL STRESSES, STRAIN(MECHANICS), DIFFERENCE EQUATIONS, DIFFERENTIAL GEOMETRY, MATRICES(MATHEMATICS), REENTRY VEHICLES, HEAT SHIELDS, THICKNESS, LOADS(FORCES), HONEYCOMB CORES, SHEAR STRESSES, SANDWICH CONSTRUCTION, FOURIER ANALYSIS, HARMONIC ANALYSIS, BONDING.

Subject Categories : Theoretical Mathematics
      Computer Programming and Software
      Structural Engineering and Building Technology

Distribution Statement : APPROVED FOR PUBLIC RELEASE