Coupled Directional Dilation–Damage Approach to Model the Cyclic-Undrained Response of Soft Clay under Pure Principal Stress Axes Rotation
Publication: Journal of Engineering Mechanics
Volume 146, Issue 5
Abstract
This study presents a directional constitutive model to predict the nonproportional cyclic behavior of undrained soft clay. A novel strategy consisting of a combination of directional dilation and the damage microplane model is used. Inherent cross-anisotropy is addressed via the modification of the integrated stress through an initial fabric tensor. The evolution of material microstructure is considered using the strain-dependent damage functions at the scale of microplanes. The variation of material stiffness is considered as a function of effective hydrostatic stress. The results were verified with available experimental data. The model accurately accounts for the effects of contributing factors, including the intermediate principal stress parameter.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
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Published In
Journal of Engineering Mechanics
Volume 146 • Issue 5 • May 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Aug 12, 2019
Accepted: Nov 19, 2019
Published online: Mar 3, 2020
Published in print: May 1, 2020
Discussion open until: Aug 3, 2020
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