Accession Number : AD0667901

Title :   INVESTIGATION OF MICROMECHANICAL BEHAVIOR OF FIBER REINFORCED PLASTICS

Descriptive Note : Final rept. 14 Jun 1966-14 Mar 1967

Corporate Author : WHITTAKER CORP SAN DIEGO CA NARMCO RESEARCH AND DEVELOPMENT DIV

Personal Author(s) : Haener, Juan ; Ashbaugh, Noel ; Chia, Chuen-Yuan ; Feng, Ming-Yuan

PDF Url : AD0667901

Report Date : Feb 1968

Pagination or Media Count : 237

Abstract : The stress fields in the components of a unidirectional composite due to shrinkage and external loads are computed for 20 matrix/reinforcement combinations having various volumetric contents. Further, the load transmissions between loaded and unloaded fibers are formulated as three- dimensional elasticity solutions. The instability problem of a composite is treated by both the static and the energy method, resulting in critical loads and buckling wavelengths which depend on material constants and geometries. The theoretical results are in good agreement with experiments. The work reported herein encompasses the following principal areas: (1) parametric studies (internal stresses and displacements computed for unidirectional composites comprised of different matrices and reinforcements combinations and different volumetric contents); (2) three-dimensional load transfer among loaded and unloaded fibers in a matrix; (3) buckling of fibers in a matrix under axial load as an elasticity solution; (4) the buckling of fibers in a matrix under axial load, solved with the Ritz-Galerkin method; and (5) buckling of fibers in a matrix due to matrix shrinkage.

Descriptors :   *REINFORCED PLASTICS, AIRFRAMES, BORON, BUCKLING, ELASTIC PROPERTIES, EPOXY RESINS, FIBERS, GLASS TEXTILES, LOADS(FORCES), MECHANICAL PROPERTIES, REINFORCING MATERIALS, SHRINKAGE, STRESSES

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE