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    Volume 49, Issue 2 (May 2019)

    Fatigue Crack Initiation Life Prediction of the Rubber Damper Based on Seq-N Curve of Rubber Material

    (Received 16 September 2018; accepted 8 March 2019)

    Published Online: 14 May 2019

    CODEN: JTEVAB

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    Abstract

    In this article, the fatigue crack initiation life of the rubber damper is predicted based on the S, e, q, , , −, N, , , , curve of rubber material. First, the general expression of the equivalent stress Seq and the fatigue crack initiation life Nf of rubber material are derived under different stress states. Second, the fatigue crack initiation life of a dumbbell-type rubber specimen under different tension strains are measured, and the fatigue parameters of the rubber material are obtained by fitting the experimental results under the uniaxial stress condition. Thus, the equivalent stresses Seq of the dangerous node in the rubber damper are obtained under different working conditions by means of the finite element numerical model. Finally, the fatigue lives of the rubber dampers are obtained by combining the general expressions of the fatigue crack initiation life Nf of rubber material with the equivalent stress Seq of the dangerous node, which are closer to the fatigue crack initiation life experimental results of the rubber damper than the fatigue life obtained based on the ε, G, L, ,, max, , , −, N, , , , curve. The results indicate the effectiveness for predicting the fatigue crack initiation life of the rubber damper based on the S, e, q, , , −, N, , , , curve of the rubber material.

    Author Information:

    Dong, Yifeng
    Department of Engineering Mechanics, Applied Mechanics Lab, Tsinghua University, Beijing,

    Yao, Xuefeng
    Department of Engineering Mechanics, Applied Mechanics Lab, Tsinghua University, Beijing,

    Li, Jinshan
    Anhui Zhongding Nvh Co. Ltd., Ningguo,

    Shen, Yun
    Anhui Zhongding Nvh Co. Ltd., Ningguo,

    Wu, Ruifeng
    Anhui Zhongding Nvh Co. Ltd., Ningguo,

    Ke, Yuchao
    Anhui Zhongding Nvh Co. Ltd., Ningguo,


    Stock #: JTE20180666

    ISSN:0090-3973

    DOI: 10.1520/JTE20180666

    Author
    Title Fatigue Crack Initiation Life Prediction of the Rubber Damper Based on Seq-N Curve of Rubber Material
    Symposium ,
    Committee D11