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    Design of A Dynamic Mechanical Analyser For Rubber Compounds

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    V.U. Sudasingha
    The document discusses the design of a dynamic mechanical analyser for rubber compounds. The analyser is designed to characterize the viscoelastic properties of polymers like rubber through dynamic mechanical analysis. It uses a forced vibration method with an eccentric rotating mass to generate sinusoidal stress and can operate at multiple stresses and frequencies by adjusting the mass's eccentricity and rotation speed. The instrument also allows adjusting static force on specimens. Material deformation is detected by a displacement sensor. The design meets all requirements of the relevant ISO testing standard.

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    Design of A Dynamic Mechanical Analyser For Rubber Compounds

    Uploaded by

    V.U. Sudasingha
    27 views1 page
    The document discusses the design of a dynamic mechanical analyser for rubber compounds. The analyser is designed to characterize the viscoelastic properties of polymers like rubber through dynamic mechanical analysis. It uses a forced vibration method with an eccentric rotating mass to generate sinusoidal stress and can operate at multiple stresses and frequencies by adjusting the mass's eccentricity and rotation speed. The instrument also allows adjusting static force on specimens. Material deformation is detected by a displacement sensor. The design meets all requirements of the relevant ISO testing standard.

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    The document discusses the design of a dynamic mechanical analyser for rubber compounds. The analyser is designed to characterize the viscoelastic properties of polymers like rubber through dynamic mechanical analysis. It uses a forced vibration method with an eccentric rotating mass to generate sinusoidal stress and can operate at multiple stresses and frequencies by adjusting the mass's eccentricity and rotation speed. The instrument also allows adjusting static force on specimens. Material deformation is detected by a displacement sensor. The design meets all requirements of the relevant ISO testing standard.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    27 views1 page

    Design of A Dynamic Mechanical Analyser For Rubber Compounds

    Uploaded by

    V.U. Sudasingha
    The document discusses the design of a dynamic mechanical analyser for rubber compounds. The analyser is designed to characterize the viscoelastic properties of polymers like rubber through dynamic mechanical analysis. It uses a forced vibration method with an eccentric rotating mass to generate sinusoidal stress and can operate at multiple stresses and frequencies by adjusting the mass's eccentricity and rotation speed. The instrument also allows adjusting static force on specimens. Material deformation is detected by a displacement sensor. The design meets all requirements of the relevant ISO testing standard.

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    © All Rights Reserved
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    MATERIALS ENGINEERING SYMPOSIUM ON INNOVATIONS FOR INDUSTRY 2017

    Design of a Dynamic Mechanical Analyser for Rubber Compounds


    H.M.R.C. Herath, I.J. Rodrigo, and V.S.C. Weragoda

    Dynamic mechanical analysis (DMA) is a powerful technique for characterization of the


    viscoelastic properties of polymers such as thermoplastics, composites, thermosets and elastomers
    in the form of sheet specimens, films, fibers, coatings or adhesives. DMA instruments measure the
    modulus (stiffness) and damping (energy dissipation) properties of materials as they are deformed
    under dynamic stress. When a polymeric material is subjected to a cyclic sinusoidal stress within
    the viscoelastic region, the corresponding strain in the material would be out of phase due to the
    delayed response of the viscous portion of the material. This phase difference corresponds to the
    frequency of the force application and this is a unique characteristic of the polymer material.
    Amplitude of the strain curve and phase shift between stress and strain curves are usually
    identified as basic parameters.

    In this design which is based on the ISO 6725 standard, forced vibration method was used and the
    vibrations are impacted by the inertia force of an eccentric rotating mass is used to generate
    sinusoidal force. Multi stress and multi frequency modes are operated by adjusting eccentricity
    and speed of rotating mass. The instrument also has facility to adjust the static force imparted on
    the specimen. Deformation of the material is detected by a displacement sensor. This design
    satisfied all requirements of the testing standard.

    Department of Materials Science and Engineering, University of Moratuwa 2

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