Characteristic Tearing Energy and Fatigue Crack Propagation of Filled Natural Rubber

Below the incipient characteristic tearing energy (<i>T</i><sub>0</sub>), cracks will not grow in rubber under fatigue loading. Hence, determination of the characteristic tearing energy <i>T</i><sub>0</sub> is very important in the rubber industry. A r...

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Autores principales: Jigang Rong, Jun Yang, Youjian Huang, Wenbo Luo, Xiaoling Hu
Formato: article
Lenguaje:EN
Publicado: MDPI AG 2021
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Acceso en línea:https://doaj.org/article/ae872ea89e6646239268ffbf3efc1a41
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Sumario:Below the incipient characteristic tearing energy (<i>T</i><sub>0</sub>), cracks will not grow in rubber under fatigue loading. Hence, determination of the characteristic tearing energy <i>T</i><sub>0</sub> is very important in the rubber industry. A rubber cutting experiment was conducted to determine the <i>T</i><sub>0</sub>, using the cutting method proposed originally by Lake and Yeoh. Then, a fatigue crack propagation experiment on a edge-notched pure shear specimen under variable amplitude loading was studied. A method to obtain the crack propagation rate d<i>a</i>/d<i>N</i> from the relationship of the crack propagation length (Δ<i>a</i>) with the number of cycles (<i>N</i>) is proposed. Finally, the <i>T</i><sub>0</sub> obtained from the cutting method is compared with the value decided by the fatigue crack propagation experiment. The values of <i>T</i><sub>0</sub> obtained from the two different methods are a little different.