H2020Индивидуална стипендия2019–2021

ICARUS · Higher-order constitutive relations for granular materials: a multi-scale approach

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2019-07-01 → 2021-06-30
Финансиране от ЕС: 187 572 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Гранулираните материали и тяхното поведение при големи деформации се анализират чрез нови математически модели, например при свлизания на земята. Това помага за по-точни компютърни симулации, които не зависят от размера на изчислителната мрежа, за да се намалят щетите в инженерството.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Higher-order constitutive relations for granular materials: a multi-scale approach

The mechanical behaviour of granular materials subjected to large deformations is important in many problems in science and engineering. Problems involving granular materials can cause significant losses in many branches of engineering, such as in energy and environmental geotechnics, chemical process industry, pharmaceutical industry and agriculture. Two examples are: (i) 476 European landslides over the past two decades have caused a total of 1370 deaths and 784 injuries with economic losses of 94 billion Euros and (ii) natural hazards have resulted in 1085 failures of global offshore facilities (with 303 events in Europe) over the past four decades. Current numerical simulation methods using classical, 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, and thus in many cases the results are still mesh-size dependent. Using an innovative multi-scale approach, the project ICARUS aims to 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. The overall objectives of ICARUS are to: (i) develop micromechanical expressions for three-dimensional higher-order strain and stress tensors for granular materials, (ii) construct higher-order constitutive models within the thermodynamic framework, based on micromechanical analyses of Discrete Element Method (DEM) simulations, and (iii) demonstrate their capabilities in solving “benchmark” geotechnical large-deformation problems. The 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.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

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.

Оригинален текст от CORDIS (на английски).

Участници

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