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Long-Term Creep Assessment of Viscoelastic Polymer by Time-Temperature-Stress Superposition

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Abstract

Nonlinear viscoelastic creep properties of poly (methyl methacrylate) at various temperatures and stress levels were measured in short-term tests to check the applicability of time-temperature-stress superposition principle, which is the combined form of time-temperature superposition principle and time-stress superposition principle. A unified master creep compliance curve was constructed from the short-term tests by joint application of time-temperature superposition and time-stress superposition. The unified master curve establishes the creep compliance over two years, which is 4.2 decades longer than the test duration. Moreover, it is verified that in nonlinear viscoelastic cases, the time-temperature shift factors are dependent on stresses at which the shifts are applied, while the time-stress shift factors are dependent on temperatures.

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Authors and Affiliations

  1. College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan, 411105, China

    Wenbo Luo, Chuhong Wang & Xiaoling Hu

  2. Department of Mechanics, Huazhong University of Science and Technology, Wuhan, 430074, China

    Tingqing Yang

Authors
  1. Wenbo Luo
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  2. Chuhong Wang
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  3. Xiaoling Hu
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  4. Tingqing Yang
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Correspondence to Wenbo Luo.

Additional information

This work was supported by NSFC(No. 11172256), NCET (No. NCET-08-0685), Key Project of Chinese Ministry of Education (No. 209085) and Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province.

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Luo, W., Wang, C., Hu, X. et al. Long-Term Creep Assessment of Viscoelastic Polymer by Time-Temperature-Stress Superposition. Acta Mech. Solida Sin. 25, 571–578 (2012). https://doi.org/10.1016/S0894-9166(12)60052-4

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  • DOI: https://doi.org/10.1016/S0894-9166(12)60052-4

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