Accession Number : ADA301789

Title :   Mechanical Behavior and Fracture Characteristics of Off-Axis Fiber Composites 1. Experimental Investigation.

Descriptive Note : Technical paper,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER

Personal Author(s) : Sinclair, John H. ; Chamis, Christos C.

PDF Url : ADA301789

Report Date : DEC 1977

Pagination or Media Count : 37

Abstract : The mechanical behavior, fracture surfaces, and fracture modes of unidirectional high-modulus graphite-fiber/epoxy composites subjected to off-axis tensile loads were investigated experimentally. The investigation included the generation of stress-strain-to-fracture data and scanning electron microscope studies of the fractured surfaces. The results led to the identification of fracture modes and distinct fracture surface characteristics for off-axis tensile loading. The results also led to the formulation of criteria for identifying and characterizing these fracture modes and their associated fracture surfaces. The results presented and discussed herein were used in the theoretical investigation and comparisons described in Part II. These results should also provide a good foundation for identifying, characterizing, and quantifying fracture modes in both off-axis and angle-plied laminates.

Descriptors :   *COMPOSITE MATERIALS, *FRACTURE(MECHANICS), STRESS STRAIN RELATIONS, MECHANICAL PROPERTIES, ELECTRON MICROSCOPES, ELECTRONIC SCANNERS, FORMULATIONS, THEORY, FIBER REINFORCED COMPOSITES, CARBON FIBERS, SURFACE PROPERTIES.

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE