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    Volume 9, Issue 1 (November 2020)

    Effects of Prestrain on the Nonlinear Viscoelastic Properties of a Model Sealant

    (Received 11 December 2019; accepted 28 September 2020)

    Published Online: 10 November 2020

    CODEN: MPCACD

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    Abstract

    Elastomeric sealants are nonlinear viscoelastic materials that exhibit the Mullins effect. As a result, the behavior of a sealant depends on the previous history of strains the sample has seen. To deal with this issue, characterization tests like ASTM C1735, Standard Test Method for Measuring the Time Dependent Modulus of Sealants Using Stress Relaxation, subject the specimen to a specific strain history before measuring properties. To gain a better understanding of this history effect, this article studied a model sealant where the nonlinear viscoelastic properties were measured after a variety of strain histories ranging from no exposure to strain before the test to the history specified in ASTM C1735. The results provide insight into how strain history affects properties, supports information for the ASTM characterization test, and adds knowledge on the nature of the Mullins effect.

    Author Information:

    Hunston, D. L.
    Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, MD

    Tan, K. T.
    Google, Mountain View, CA

    White, C. C.
    Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, MD


    Stock #: MPC20190255

    ISSN:2379-1365

    DOI: 10.1520/MPC20190255

    Author
    Title Effects of Prestrain on the Nonlinear Viscoelastic Properties of a Model Sealant
    Symposium ,
    Committee C24