A nonlinear constitutive equation based on the model of Bernstein, Kearsley and Zapas (BKZ) is developed by noting that the BKZ model has a structure that looks like a time-dependent finite elasticity. By postulating, as did Valanis and Landel (VL) for rubber, that the strain potential function can be represented by a separable function in the stretches we develop a hybrid VL-BKZ viscoelastic model. Results of model predictions for multiple step deformation and stress histories are compared with experiments using a polyurethane elastomer.
|Number of pages||6|
|State||Published - 1998|
|Event||Proceedings of the 1998 56th Annual Technical Conference, ANTEC. Part 1 (of 3) - Atlanta, GA, USA|
Duration: Apr 26 1998 → Apr 30 1998
|Conference||Proceedings of the 1998 56th Annual Technical Conference, ANTEC. Part 1 (of 3)|
|City||Atlanta, GA, USA|
|Period||04/26/98 → 04/30/98|