STP1169

    Integrated Mechanics for the Passive Damping of Polymer-Matrix Composites and Composite Structures

    Published: Jan 1992


      Format Pages Price  
    PDF (324K) 19 $25   ADD TO CART
    Complete Source PDF (11M) 19 $135   ADD TO CART


    Abstract

    Some recent developments on integrated damping mechanics for unidirectional composites, laminates, and composite structures are reviewed. Simplified damping micromechanics relate the damping of on-axis and off-axis composites to constituent properties, fiber volume ratio, fiber orientation, temperature, and moisture. Laminate and structural damping mechanics for thin composites are summarized. Discrete layer damping mechanics for thick laminates, including the effects of interlaminar shear damping, are developed and semi-analytical predictions of modal damping in thick simply-supported specialty composite plates are presented. Applications demonstrate the advantages of the unified mechanics, and illustrate the effect of fiber volume ratio, fiber orientation, structural geometry, and temperature on the damping. Additional damping predictions for composite plates of various laminations, aspect ratios, fiber content, and temperature illustrate the merits and ranges of applicability of each theory (thin or thick laminates).

    Keywords:

    composites, damping, unidirectional composites, off-axis composites, laminates, structures, hygrothermal effects, thin composites, thick composites, interlaminar shear damping, material damping, mechanical properties


    Author Information:

    Saravanos, DA
    Resident research associatesenior aerospace scientist, Ohio Aerospace InstituteNASA Lewis Research Center, Cleveland, OH

    Chamis, CC
    Resident research associatesenior aerospace scientist, Ohio Aerospace InstituteNASA Lewis Research Center, Cleveland, OH


    Paper ID: STP17979S

    Committee/Subcommittee: E28.10

    DOI: 10.1520/STP17979S


    CrossRef ASTM International is a member of CrossRef.