Hygrothermal Response of Polymer Matrix Composite Materials.
Final rept. 9 Feb 76-8 Feb 79,
WYOMING UNIV LARAMIE DEPT OF MECHANICAL ENGINEERING
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A two-dimensional, generalized plane strain, finite element analysis of the stress states in the individual fibers and surrounding matrix of a unidirectionally reinforced composite material was developed. The fibers are modeled as elastic but anisotropic the matrix is modeled as isotropic, but elastoplastic. Thermal and moisture absorption histories as well as temperature - and moisture-dependent material properties are included. A complete finite element computer program, an associated plot package, and extensive numerical results are available. Experimental work was conducted using unreinforced neat resin, castings of Hercules 3501-6 epoxy matrix, as well as AS3501-6 graphiteepoxy matrix, and S23501-6 glassepoxy unidirectional composites. Axial and transverse tensile tests as well as torsional shear tests were performed, under various temperatures and moisture conditions. Experimental results and comparisons with micromechanics predictions are summarized, with references given to various conference and journal publications for detailed information. Author
- Laminates and Composite Materials