CUED Publications database

Numerical analysis of submarine debris flows based on critical state soil mechanics

Kobayashi, T and Soga, K and Dimmock, P (2015) Numerical analysis of submarine debris flows based on critical state soil mechanics. In: UNSPECIFIED pp. 975-980..

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© 2015 Taylor & Francis Group, London. Submarine debris flows are an extremely complex phenomenon that involves phase transition of the material from solid to semi-fluid. This is caused by large deformation and possible occurrence of entraining ambient fluid. In the conventional ‘equivalent fluid method’ based on Non-Newtonian fluid models, constant rheological parameters are assumed and calibrated using the evidence of previous debris flows. Such parameters, however, do not accurately represent the material behavior and the real physics involved in submarine debris flows. The aim of this study is to develop a new modeling framework for submarine debris flows based on the critical state soil mechanics. The effect of phase transition is incorporated in a modified Cam clay based constitutive model. The diagnostic analyses indicate that the proposed model is capable of reproducing the previous flow event by using the material parameters derived from the conventional soil tests.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:10
Last Modified: 20 Aug 2020 03:21
DOI: 10.1201/b18442-142