Finite Element Application of the Time-Temperature Superposition Principle (TTSP) to Polymer

XU Jin-sheng; YANG Xiao-hong; ZHAO Lei; WANG Hong-li; HAN Long

doi:10.3879/j.issn.1000-0887.2015.05.009

Volume 36 Issue 5

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Article Navigation > Applied Mathematics and Mechanics > 2015 > 36(5): 539-547

XU Jin-sheng, YANG Xiao-hong, ZHAO Lei, WANG Hong-li, HAN Long. Finite Element Application of the Time-Temperature Superposition Principle (TTSP) to Polymer[J]. Applied Mathematics and Mechanics, 2015, 36(5): 539-547. doi: 10.3879/j.issn.1000-0887.2015.05.009

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Finite Element Application of the Time-Temperature Superposition Principle (TTSP) to Polymer

doi: 10.3879/j.issn.1000-0887.2015.05.009

¹School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P.R.China;²Anhui Dongfeng Electrical and Mechanical Technology Co., Ltd., Hefei 230000, P.R.China

Received Date: 2014-11-11
Rev Recd Date: 2014-12-17
Publish Date: 2015-05-15

Abstract

Abstract

To better describe the temperature-dependent mechanical properties of polymer materials, an improved WLF model was proposed, with a ‘zero time’ factor introduced to promote the precision of the relaxation modulus acquisition at different temperature levels for linearly viscoelastic materials. Thereafter, the improved WLF model was applied in the finite element calculation via user material subroutine UTRS in ABAQUS. The model parameters were obtained out of a series of relaxation tests at different temperature levels, and the feasibility and validity of the improved WLF model and the numerical method were verified through the constant-rate tensile tests of composite propellant specimens. The results show that, compared with the traditional findings, the relaxation moduli acquired in view of the ‘zero time’ factor at different temperature levels are more accurate, and the improved WLF model is more applicable and precise for the temperature-dependent description of composite propellants.
- time-temperature superposition principle,
- linearly viscoelastic,
- relaxation modulus,
- polymer,
- ‘zero time’factor,
- finite element

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References(16)

References

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