ASTM WK73432

    Revision of D945 - 16 Standard Test Methods for Rubber Properties in Compression or Shear (Mechanical Oscillograph)

    (What is a Work Item?)

    Active Standard: D945 - 16

    Developed by Subcommittee: D11.10 | Committee D11 | Contact Staff Manager



    WK73432


    Keywords

    chronograph; compression; creep; deflection; deformation; dynamic modulus; elevated temperature; hysterisis; initial creep; kinetic energy; low temperature; mechanical oscillograph; point modulus; resilience; set; shear; static modulus; strain; stress; subnormal temperature; tangent modulus; Yerzley;;

    Rationale

    ASTM D945 Method C Tavdi Co, Inc. June 2020 ABSTRACT Method C is implemented by a new machine, designated as Dynamic Mechanical Yerzley oscillograph V which is conceptually based on the venerable Yerzley Oscillograph. Just as the Yerzley Oscillograph, DMYO-V uses an oscillating beam with weights, testing for dynamic mechanical properties of elastomers always at the natural frequency of the configuration. DMYO-V incorporates not only a displacement transducer but also a load cell. These two sensors facilitate the measurement of the actual dynamic load as well as the measurement of the actual phase angle between the force and displacement. DMYO-V uses a motor driven weight table on its beam, enabling a moment arm that can vary between 4 and 11. The machine can be set up automatically for the desired strain.

    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    06-30-2020

    Technical Contact:
    Ismail Saltuk

    Status:
    Draft Under Development