Volume 3, Issue 5 (September 1975)

    New Model Material for Three-Dimensional Stress Analysis

    CODEN: JTEOAD

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    Abstract

    This paper describes the manufacturing of a family of epoxies, the Poisson's ratio of which at the critical temperature is on the order of 0.4. The variation of Young's modulus, Poisson's ratio, shear fringe value, and critical temperature as a function of the amount of hardener, the curing temperature, and the curing time for a large range of these variables are presented as parametric curves.

    Previously, epoxies used in three-dimensional analysis have all shown a Poisson's ratio of about 0.5, indicating incompressibility. The new compressible material has two advantages: (1) it is closer to the common engineering materials and (2) strains can be measured at interior points to supplement photoelastic analysis, or strain measurements can be used exclusively to obtain stresses throughout the body.


    Author Information:

    Hasseem, HM
    Engineer, Cessna Aircraft, Wichita, Kan

    Durelli, AJ
    Professors, The Catholic University of America, Washington, D.C.,

    Parks, VJ
    Professors, The Catholic University of America, Washington, D.C.,


    Stock #: JTE10177J

    ISSN: 0090-3973

    DOI: 10.1520/JTE10177J

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    Author
    Title New Model Material for Three-Dimensional Stress Analysis
    Symposium , 0000-00-00
    Committee E28