ABSTRACT
This article presents the development, validation and main features of the new constitutive model EXPO-COM for the compaction behavior of crushed salt, which was developed at the Chair of Geomechanics and Multiphysics Systems of Clausthal University of Technology (TUC) within the framework of the joint projects KOMPASS I and KOMPASS II. The methodical analysis of measured data is applied on five selected long-term experiments for the compaction behavior of crushed salt. Two main features of the analysis are first the isolation and quantification of measured values for each influencing factor and second the normalization of processed data for systematic comparative analysis of several experiments with different load histories. Based on the analysis, the process of development, the structure and the mathematical formulation of constitutive model are briefly described. Finally, a successful validation of the model is carried out through accurate simulations of selected tests that are representative of in-situ conditions. For future, the validated ranges for several influencing factors have to be expanded to increase the reliability and robustness of numerical predictions using the new model.
