This file discusses an updated version of the Bergstrom-Boyce (BB) model that improves the predictions of cyclic loading and simplifies the numerical implementation of the model.
The title of the report is: Constitutive Modelling of the Time-Dependent and Cyclic Loading of Elastomers and Application to Soft Biological Tissues. The final version of this draft working paper is published in: Mechanics of Materials, Vol. 33, pp. 523--530, 2001.