Experimental Studies on Deformation Behaviors of Rubbery Materials under Cyclic Loading

Abstract:

Macroscopic cyclic tension-unloading experiments are conducted to investigate the cyclic deformation behaviors of CB filled vulcanized hydrogenated nitrile butadiene rubber at room temperature. In the load-controlled cyclic tension-unloading tests, remarkable ratchetting occurs, and the effects of the level and rate of cyclic loading on the ratchetting are also investigated. The ratcheting strain increases with the increasing mean stress and stress amplitude, and more obvious ratchetting is observed in the cyclic test with load-hold or at lower loading rate. In the displacement-controlled cyclic tension-unloading tests, the responding peak stress of the H-NBR decreases continuously, but the residual strain increases with the increasing number of cycles. Furthermore, the zero-stress hold at the end of cyclic test demonstrates that the residual strain will be recovered partially, which implies that the residual strain of the H-NBR after cyclic test consists of the reversible and irreversible parts.

• Periodical: Applied Mechanics and Materials (Volume 853)
• Pages: 106-111
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.853.106
• Online since: September 2016
• Authors: Yi Fu Chen, Guo Zheng Kang*, Ru Tao, Han Jiang
• Keywords: Cyclic Loading, Ratcheting, Residual Strain, Rubbery Materials

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