Nonlinear Finite Element Analysis of a General Composite Shell
Abstract
An analytical study, using the STAGSC-1 computer code, was conducted on a Kevlar/Polyester composite shell of general shape with internal asymmetrical pressure loading. Experimentation was conducted on the shell to find displacements in the shell due to this internal pressure loading. Modeling of the composite structure was done in increments whereby each change in the finite element model better approximated the actual shell. Nonlinear computer runs were done at each model increment to compare against experimental results. Linear computer runs were also completed for comparison purposes. It was found that accurate modeling of the shell to include thickness variations, boundary conditions, and materials is essential to obtain reasonable results. Also, the incorporation of the nonlinear analysis leads to displacement results that are within 15% of experimentation. Linear results from the same model are in error by over 75% due to large displacements in the shell. Keywords: Finite element analysis, Composite materials, Theses.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1988
- Accession Number
- ADA202572
Entities
People
- Gregory S. Egan
Organizations
- Air Force Institute of Technology