Descripción del proyecto
Mejor predicción del comportamiento de los materiales granulares, en función de su comportamiento a pequeña escala
Los materiales granulares compuestos de muchas partículas macroscópicas se encuentran habitualmente en numerosas aplicaciones, desde cemento y arena para la construcción hasta polvos farmacéuticos o nanomateriales para aplicaciones electrónicas. El comportamiento de los materiales granulares cuando están sometidos a grandes deformaciones resulta de especial interés. Tanto las propiedades microscópicas como los comportamientos macroscópicos deben representarse adecuadamente. El proyecto ICARUS, financiado con fondos europeos, está elaborando simulaciones numéricas a múltiples escalas que superen los retos existentes de varias metodologías empleadas actualmente, lo cual mejorará nuestra capacidad de reducir al mínimo los riesgos asociados a peligros naturales.
Objetivo
The mechanical behaviour of granular materials subjected to large deformations is important in many problems in science and engineering. Current numerical simulation methods using zeroth-order constitutive relations give results that are dependent on the employed mesh size. This problem can be circumvented by using higher-order constitutive relations. However, current higher-order constitutive relations are heuristic, thus in many cases the results are still mesh-size dependent. Using an innovative multi-scale approach, I will constructively challenge current higher-order continuum theories from a fundamental perspective, namely by consideration of the underlying microstructure, in order to obtain mesh-independent solutions. In ICARUS, I will: 1) develop micromechanical expressions for three-dimensional higher-order strain and stress tensors for granular materials, 2) construct higher-order constitutive models within the thermodynamic framework, based on micromechanical analyses of DEM simulations, and 3) demonstrate their capabilities in solving “benchmark” geotechnical large-deformation problems. My investigation results in a computational simulation method that provides valuable insights in large-deformation engineering problems and thus will aid in assessing and reducing risks of natural hazards, with benefits for society. Under the guidance of Prof Kruyt, an internationally-recognised expert on micromechanics of granular materials, and of my high-level international steering committee, I will acquire deep knowledge on granular micromechanics and higher-order continuum theories. This lays a solid foundation for my scientific career. ICARUS paves the way for my ambition to become an outstanding independent researcher on multi-scale studies of granular materials, by significantly strengthening my scientific skills and track record, enhancing my mentoring and teaching capabilities and expanding my international scientific network.
Ámbito científico
Programa(s)
Régimen de financiación
MSCA-IF-EF-ST - Standard EFCoordinador
7522 NB Enschede
Países Bajos