Finite element model updating is an inverse method which enables to arrive at a complete solution for the diffuse necking of a thick tensile specimen. The method relies on the characterization of a phenomenological strain hardening model. Therefore, the method's accuracy is limited due to the predefined character of the analytical function. Consequently, identifying a generic strain hardening model is proposed in this work. First, different possible generic functions to characterize the actual strain hardening behaviour of a material have been scrutinized. Next, the optimal identification procedure has been examined whereof finally, the flexibility of the model has been probed.
Denys, K., Coppieters, S., & Debruyne, D. (2017). On the characterisation of a generic hardening model beyond the onset of necking. In Procedia Engineering (Vol. 207, pp. 221–226). Elsevier Ltd. https://doi.org/10.1016/j.proeng.2017.10.765