ESR 4


Constitutive modelling for adhesive granular solids

The topic of my project is to develop a micromechanical-based constitutive model for cohesive granular materials. The aim of the project is to extract information from particle-scale simulations and develop a multiscale theoretical model, where a dependence cohesivity/wetting degree of the material is included. In order to achieve this goal, the following tasks are planned:

  • Performing Discrete Element simulations on simple-element tests and comparing them with laboratory data.
  • Using micro-macro transition methods to extract field variables from the simulations, focusing on the dependence of the micro-macro procedure on the cohesivity/wetting degree, starting from non cohesive frictional and non-frictional models.
  • Investigating granular flow as function of cohesivity/wetting degree.
  • Working with multiscale constitutive models where the variation of structure, friction, cohesivity/wetting degree is included.
    Using a set of meso-scale numerical tests (uni-axial, hydrostatic, triaxial, etc) for the calibration of the multiscale constitutive models.
  • Applying independent industrial scale tests for validation of the model.

Kianoosh Taghizadeh

Biography

Kianoosh Taghizadeh completed his BEng degree in mechanical engineering at the Malek-Ashtar University of Technology, Iran. His bachelor thesis was under the supervision of Prof. Filippo Berto, University of Padova, Italy, which is depicted in the “Local strain energy density applied to martensitic steel plates weakened by Unotches under mixed mode loading”. He received his Msc degree in Computational Materials Science at the Technical University Bergakademie Freiberg, Germany, where he worked with the applied mechanics and solid mechanics group chaired by Prof. Meinhard Kuna. His master's thesis was titled “Implementation of a shear modified Gurson-model into the FE-program Abaqus" for which he received the DAAD prize of TU Freiberg and the outcomes will be published in a journal paper. He is currently on a Marie Curie fellowship for his PhD in the multi-scale mechanics group, Faculty of Engineering Technology (CTW), chaired by Prof. Stefan Luding at the University of Twente, Netherlands. His research interests concern micromechanical-based constitutive models for cohesive granular materials and his focus is on the calibration of the theoretical model by particles simulations. Furthermore, he has a track record of research and work experience in the filed of solid mechanics, where he is interested to understand the failure behavior of materials and structures. He collaborates with other researchers in various institutions including University of Edinburgh, UK, UT Compiegne, France, CIMNE, Spain, RCPE, Austria and TU Bergakademie Freiberg, Gemany.

Kianoosh Taghizadeh