3.4. Validation
In order to validate the proposed model, the experimental data are compared with model predictions considering βm = 317, KIm = 3.12MPa, n = 1.4, A = 39MPas and B = 9.5MPa . Four different strain rates are considered: View the MathML source, View the MathML source, View the MathML source, View the MathML source.
Clearly, from the results shown in Fig. 11, good agreement can be seen between experimental data and the proposed model using estimated parameters. The small discrepancy can be attributed to material response, which is very complex. Moreover, it is important to emphasize that with only three tests, considering three different strain rates, are sufficient to predict the mechanical behavior of the PTFE.