Summary
A heuristic constitutive equation and an FE formulation for rubber under small oscillatory loads superimposed on large static deformations are presented. The viscoelastic constitutive model, [9], is implemented in an FE code to analyze the dynamic characteristics of rubber elements under general loading conditions. Dynamic tests in which the rubber specimens endure steady-state harmonic motion superimposed on large static deformation are performed in order to verify the proposed model. Compression and complex-stress tests are included in the tests to check the proposed model under multi-axial stress states. The FEA results are compared with the experimental results. The proposed model successfully predicts dynamic stiffness peak in the complex-stress test, which cannot be explained by conventional models. The model shows a better performance than existing models in predicting the behavior of rubber specimens that are subject to complex pre-strain.
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Acknowledgments This work was supported by grant No.R01–2001–000–00393 from the Basic Research Program of the Korea Science & Engineering Foundation.
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Kim, BK., Youn, SK. & Lee, WS. A constitutive model and FEA of rubber under small oscillatory load superimposed on large static deformation. Archive of Applied Mechanics 73, 781–798 (2004). https://doi.org/10.1007/s00419-004-0325-x
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DOI: https://doi.org/10.1007/s00419-004-0325-x