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Title: A visco-hyperelastic constitutive description of elastomer behaviour at high strain rates
Authors: Pouriayevali, H.
Guo, Y.B. 
Shim, V.P.W. 
Keywords: Compression
Constitutive model
High strain rate
Issue Date: 2011
Citation: Pouriayevali, H., Guo, Y.B., Shim, V.P.W. (2011). A visco-hyperelastic constitutive description of elastomer behaviour at high strain rates. Procedia Engineering 10 : 2274-2279. ScholarBank@NUS Repository.
Abstract: A visco-hyperelastic constitutive equation in integral form is proposed to describe the large deformation response of incompressible elastomeric materials at high strain rates. It comprises two components: the first corresponds to hyperelasticity based on a strain energy density function expressed in polynomial form to characterize quasi-static nonlinear response, while the second is an integral form of first and incorporates a relaxation-time function to capture rate sensitivity and strain history dependence. Instead of a constant relaxation-time, a deformation-dependent function is proposed for the relaxation-time. The model is applied to describe the response of SHA60 rubber and Nylon-6. Material samples are subjected to quasi-static and dynamic loading using a universal testing machine and a Split Hopkinson Bar device respectively. Comparison of the proposed equation with experimental results shows a good degree of agreement and demonstrates its potential to describe the dynamic behavior of viscoelastic materials over a range of strain rates. © 2011 Published by Elsevier Ltd.
Source Title: Procedia Engineering
ISSN: 18777058
DOI: 10.1016/j.proeng.2011.04.376
Appears in Collections:Staff Publications

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