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Published November 14, 2014 | Submitted
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A Simple Collocation Method for Fitting Viscoelastic Models to Experimental Data


An easily applied collocation method is discussed for fitting the response of finite-element viscoelastic models to experimental stress-strain curves. It can be used with creep, relaxation, and steady-state oscillation data. The method is illustrated by means of two examples. As the first one, a model is obtained utilizing the dynamic shear compliance of polyisobutylene. In the second example we calculate a model from the tensile relaxation modulus of polymethyl methacrylate. With each case the model's response agreed with the experimental data within graphical accuracy over the entire frequency (or time) scale.

Additional Information

© 1962 California Institute of Technology. November 1961, Revised February 1962. This research was supported by the Aeronautical Research Laboratory Office of Aerospace Research United States Air Force Contract No. AF 33(616)-8399, GALCIT 119.

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Submitted - SM_61-23A.pdf


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