American Society of Civil Engineers


Calibration of Parameters for a single Hardening Model


by Amit Prashant, M.ASCE, (Research Associate, Department of Civil and Environmental Engineering, University of Tennessee, 106 Perkins Hall, Knoxville, TN 31996-2010) and Dayakar Penumadu, M.ASCE, (Professor, Department of Civil and Environmental Engineering, University of Tennessee, 109 Perkins Hall, Knoxville, TN 31996-2010)
Section: Calibration of Constitutive Models, pp. 1-11, (doi:  http://dx.doi.org/10.1061/40786(165)7)

     Access full text
     Purchase Subscription
     Permissions for Reuse  

Document type: Conference Proceeding Paper
Part of: Calibration of Constitutive Models
Abstract: A single hardening model (proposed by Lade and co-workers) is calibrated using 12 model parameters, which can be determined from one isotropic consolidation test (with unloading and reloading), and three triaxial shear tests; however, the process of calibrating these parameters is relatively complex. In this paper, the authors have calibrated this model for the purpose of predicting the experimentally observed 3-D mechanical behavior of Kaolin clay through advanced laboratory testing. During this calibration process, several interesting issues were observed for the specific Kaolin clay used in the study. These issues are discussed in light of the concepts behind relevant calibration parameters and their significance to the model predictions. Based on the definition of plastic work, a modified approach for calibrating the work hardening parameters is presented and shows some promise. Various aspects of this model are also presented in the context of predicting the mechanical behavior of soils including the sensitivity of the model parameters over the prediction of the complex mechanical behavior under generalized state of stress/strain.


ASCE Subject Headings:
Calibration
Hardness
Models
Soil consolidation
Soil properties