Moisture Diffusion Analysis in Multilayer Composite Materials by Finite Difference Analysis.
Abstract
This report provides a FORTRAN source code for calculating the moisture uptake, diffusion, and internal distribution through the thickness of multi-layered composite sandwich materials as a function of time. This finite difference diffusion code (FDDC) was designed as a handy tool for materials engineers and electronics engineers who have no easy access to a finite element diffusion code (FEDC), yet who have a need to study long-term moisture effects on composites or sandwich structures. A unidirectional diffusion analysis through laminated plates or sandwich panels with many different material layers, for many different environments, can be performed within a few seconds of CPU time. The code can be run on Macintosh or IBM-compatible computers. A sample run is provided which may serve as a tutorial and also as a comparison with a previously run finite element analysis of the same problems. The differences in the sample runs for the calculated moisture concentrations of the FDDC and FEDC analyses were insignificant (less than one-half percent).
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1996
- Accession Number
- ADA306679
Entities
People
- Alan E. Berger
- Joseph M. Augl
Organizations
- Naval Ordnance Laboratory