Accession Number : ADA106378


Title :   Nonlinear Finite Element Analysis of Sandwich Composites.


Descriptive Note : Final rept. Sep 77-Nov 80,


Corporate Author : DAYTON UNIV OH RESEARCH INST


Personal Author(s) : Brockman,Robert A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a106378.pdf


Report Date : Mar 1981


Pagination or Media Count : 112


Abstract : Finite element analysis techniques are developed for the solution of nonlinear problems involving sandwich composite materials. Each layer of a sandwich panel is represented explicitly so that multicore panels and other configurations are easily considered. The finite element discretization is performed using arbitrary-shaped, fully compatible shell and continuum elements, as well as special elements representing full-depth and/or face sheet stiffeners. Each of these elements is capable of representing arbitrarily large displacements and rotations, since no simplifying assumptions are made in the theoretical formulation. Elastic-plastic effects may also be considered. An associated computer program is described which may be used to perform linear or nonlinear solutions for mechanical and thermal loading, linear natural frequency calculations. Several example problems are solved to demonstrate the capabilities of the program. (Author)


Descriptors :   *COMPOSITE MATERIALS , *FINITE ELEMENT ANALYSIS , *NONLINEAR ANALYSIS , *SANDWICH CONSTRUCTION , COMPUTER PROGRAMS , COMPUTERIZED SIMULATION , EQUATIONS OF MOTION , STATIC LOADS , ELASTIC PROPERTIES , STIFFENING , BENDING , SHELLS(STRUCTURAL FORMS) , BUCKLING , PLASTIC PROPERTIES , THERMAL STRESSES , SANDWICH PANELS , HONEYCOMB CORES


Subject Categories : Laminates and Composite Materials
      Numerical Mathematics
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE