The paper concerns identification of parameters of one-surface elasto-plastic model of clay with anisotropic hardening law by means of simple tests in triaxial apparatus. The calibration process consists of evaluation of modified Cam-clay parameters (λ, κ, M i G) that represent normal consolidation states as well as additional parameters (C, μ) of Gryczmański’s model characterising overconsolidation states. Modernization of laboratory test stand as well as characteristics of tests performed and their results have been presented in the paper.
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