Coffee Talk - "Numerical simulation of problems in large displacement and large deformation regime with an implicit Material Point Method", by Ilaria Iaconeta
Wednesday, May 17th, 2017. Time: 15h
Place: O.C. Zienkiewicz Conference Room, C1 Building, UPC Campus Nord, Barcelona.
In this talk an implicit version of the Material Point Method (MPM), implemented in the Kratos Multiphysics platform, is presented. The Material Point Method (MPM) is a particle-based technique that combines the use of a Lagrangian description of the continuum, represented by the material points, with a discretization of the computational domain, given by an Eulerian grid, which in the current work is considered fixed. A formulation, which takes account of large displacement and large deformation regime, is implemented, such that non-linear problems can be tackled and accurate results can be obtained.
Unlike the Discrete Element Method (DEM), where particles represent the physical particles that compose the bulk, the material points in MPM are representative volumes of the continuum. On each material point it is possible to store the information of the material and the historical variables, characterizing the material response, without committing mapping information errors, typical of methods, which make use of remeshing techniques. This feature of MPM makes the method particularly attractive for the resolution of problems, where more than one material is involved and where complex constitutive laws are used.
The vast majority of MPM techniques in the literature are based on an explicit time integration. The techniques proposed in the current work, on the contrary, are based on implicit approaches which can be easily adapted also to the simulation of static cases. Classical benchmark tests in solid and soil mechanics are used to assess the capabilities of the method both in static and dynamic problems and in problems dealing with large deformations.
Ilaria studied at the Politecnico di Milano, Italy, where she received her Bachelor’s degree in Civil Engineering in 2011 and her Master’s degree in Hydraulic Engineering in 2014.
Her Master’s Degree thesis topic was on the field of groundwater; she studied the physical process of infiltration within the Vadose Zone and the investigation of the stochastic nature of output data for transient unsaturated flow.
Nowadays she is a Marie Curie Early Stage Researcher in the T-MAPPP European Project. She is doing her PhD in CIMNE and she is the developer of an open-source MPM code in KratosMultiphysics.