Journal Published Online: 14 May 2019
Volume 49, Issue 2

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

CODEN: JTEVAB

Abstract

In this article, the fatigue crack initiation life of the rubber damper is predicted based on the SeqN 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 εGL,maxN curve. The results indicate the effectiveness for predicting the fatigue crack initiation life of the rubber damper based on the SeqN curve of the rubber material.

Author Information

Dong, Yifeng
Department of Engineering Mechanics, Applied Mechanics Lab, Tsinghua University, Beijing, P. R. China
Yao, Xuefeng
Department of Engineering Mechanics, Applied Mechanics Lab, Tsinghua University, Beijing, P. R. China
Li, Jinshan
Anhui Zhongding Nvh Co. Ltd., Ningguo, P. R. China
Shen, Yun
Anhui Zhongding Nvh Co. Ltd., Ningguo, P. R. China
Wu, Ruifeng
Anhui Zhongding Nvh Co. Ltd., Ningguo, P. R. China
Ke, Yuchao
Anhui Zhongding Nvh Co. Ltd., Ningguo, P. R. China
Pages: 16
Price: $25.00
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Details
Stock #: JTE20180666
ISSN: 0090-3973
DOI: 10.1520/JTE20180666