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Material Point Method: Application to Cohesive materials
Material Point Method: Application to Cohesive materials
Material Point Method is a mesh-free method, proposed by Sulsky in early 1990s. My research focus on validating the Material Point Method (GIMP variants) combining with the strain-rate softening constitutive model to study the undrained behaviour of clay particularly the sensitive clays.
Material Point Method is a mesh-free method, proposed by Sulsky in early 1990s. My research focus on validating the Material Point Method (GIMP variants) combining with the strain-rate softening constitutive model to study the undrained behaviour of clay particularly the sensitive clays.
1. Penetration problems (paper)
1. Penetration problems (paper)
Validation of penetration depth with experiment
Validation of penetration depth with experiment
Validation of penetration force with experiment
Validation of penetration force with experiment
Penetration problem is a very typical problem in geotechnical engineering. We simulate the fall cone test - a simple laboratory experiment used to determine the undrained shear strength and the sensitivity of the soft clays. Then we validate MPM combined with a strain-rate dependent constitutive model with the theoretical solutions and published experiments, conducted by Hazell (2008) in University of Oxford. The numerical results are good agreement with the theoretical and experimental results. More details are in this paper (open access).
Penetration problem is a very typical problem in geotechnical engineering. We simulate the fall cone test - a simple laboratory experiment used to determine the undrained shear strength and the sensitivity of the soft clays. Then we validate MPM combined with a strain-rate dependent constitutive model with the theoretical solutions and published experiments, conducted by Hazell (2008) in University of Oxford. The numerical results are good agreement with the theoretical and experimental results. More details are in this paper (open access).
Reference: Q. A. Tran, W. Sołowski. Generalized Interpolation Material Point Method modelling of large deformation problems including strain-rate effects – Application to penetration and progressive failure problems. Computers and Geotechnics 2019;106: 249-265
Reference: Q. A. Tran, W. Sołowski. Generalized Interpolation Material Point Method modelling of large deformation problems including strain-rate effects – Application to penetration and progressive failure problems. Computers and Geotechnics 2019;106: 249-265
2. Quickness test (paper)
2. Quickness test (paper)
Quickness test simulation
Quickness test simulation
Validation of numerical model and experiment
Validation of numerical model and experiment
Quickness test (Thakur and Degago, 2012)
Quickness test (Thakur and Degago, 2012)
Quickness test is to a simple experiment, similar to slump test, to investigate the susceptibility of the clay to create large retrogression landslides. We cooperate with Norwegian University of Science and Technology where the tests were performed and replicate the experiments using the Material Point method.
Quickness test is to a simple experiment, similar to slump test, to investigate the susceptibility of the clay to create large retrogression landslides. We cooperate with Norwegian University of Science and Technology where the tests were performed and replicate the experiments using the Material Point method.
Details of the research are presented in this paper.
Details of the research are presented in this paper.
Reference: Q. A. Tran, W. Sołowski, V. Thakur, M. Karstunen. Modelling of the Quickness test of Sensitive Clays using the Generalized Interpolation Material Point Method. In: V. Thakur, J. S. L'Heureux, A. Locat (eds) Landslides in Sensitive Clays. Advances in Natural and Technological Hazards Research, vol 46. Springer; 2017
Reference: Q. A. Tran, W. Sołowski, V. Thakur, M. Karstunen. Modelling of the Quickness test of Sensitive Clays using the Generalized Interpolation Material Point Method. In: V. Thakur, J. S. L'Heureux, A. Locat (eds) Landslides in Sensitive Clays. Advances in Natural and Technological Hazards Research, vol 46. Springer; 2017
3. Progressive failure of the sensitive clay landslides (paper)
3. Progressive failure of the sensitive clay landslides (paper)
A sensitive clay landslide is very complicated because sensitive clay has complex mechanical properties. In this research, we focused on progressive failure of sensitive clay landslide in particular spread failure, which involve the horizontal failure surface propagation and dislocation and formation of horst and grabens. Using the Material Point Method and a strain-rate dependent, softening constitutive model, we are able to replicate the complex failure and post-failure mechanism of spreads of the Sainte-Monique sensitive landslides in 1994 in Quebec.
A sensitive clay landslide is very complicated because sensitive clay has complex mechanical properties. In this research, we focused on progressive failure of sensitive clay landslide in particular spread failure, which involve the horizontal failure surface propagation and dislocation and formation of horst and grabens. Using the Material Point Method and a strain-rate dependent, softening constitutive model, we are able to replicate the complex failure and post-failure mechanism of spreads of the Sainte-Monique sensitive landslides in 1994 in Quebec.
Reference: Q. A. Tran, W. Sołowski. Generalized Interpolation Material Point Method modelling of large deformation problems including strain-rate effects – Application to penetration and progressive failure problems. Computers and Geotechnics 2019;106: 249-265
Reference: Q. A. Tran, W. Sołowski. Generalized Interpolation Material Point Method modelling of large deformation problems including strain-rate effects – Application to penetration and progressive failure problems. Computers and Geotechnics 2019;106: 249-265
Soil calibration with CPTUs
Soil calibration with CPTUs
Soil calibration with direct shear test
Soil calibration with direct shear test
Sante-Monique landslide modelling
Sante-Monique landslide modelling
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