Validation of a non-associated critical state model |
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| Authors: | TA Newson |
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| Institution: | Department of Civil Engineering, The University of Dundee, Dundee, DDI 4HN, UK |
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| Abstract: | A non-associated constitutive critical state model is proposed. The yield surface is that of Modified Cam Clay, whilst the plastic potential is an empirical function. The yield and plastic potential surfaces in the octahedral plane vary from circular at low stress ratios, to the Matsuoka-Nakai surface at failure. Assessment of the model has been by comparison with laboratory tests on soft clay. Further validation has been by predicting centrifuge model behaviour using a modified form of the CRISP finite element program. Comparisons of the numerical analyses, using the proposed model and Modified Cam Clay, show improved correlations with the experimental data. © |
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