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Lan Jin,Shanpeng Li,Yonggui Cheng,Jianlin Liu 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.5
In petroleum engineering with severe environments, the supercritical CO 2 corrosion is one of the main factors causing sealing failure of packers. In the study, the CO 2 corrosion experiments of hydrogenated nitrile butadiene rubber (HNBR) under high temperature and high pressure (HTHP) are carried out. By fitting the uniaxial tension experimental data it shows that, the Yeoh model depicts the mechanical behaviors of HNBR better among the common constitutive models. Moreover, the uniaxial tension experiments with different corrosive time are conducted, and the time-dependent Yeoh model is developed considering the corrosive time. The predicted result of the model is well verified by the data of 8-day corrosion. With the model, for rubber cylinder, the maximum radial contact stress and the maximum axial displacement are computed by finite element simulation to characterize the sealing performance. The model can predict the mechanical behaviors of structures made of HNBR under supercritical CO 2 corrosion.