Size-sensitive strategies for the multiscale design of fracture-resistant heterogeneous materials
Réf ABG-127316
Sujet de Thèse
02/12/2024
Financement public/privé
Ecole Nationale des Ponts et Chaussées
Lieu de travail: Champs-sur-Marne - Ile-de-France - France
Champs scientifiques
* Sciences de l’ingénieur
* Numérique
Mots clés: fracture mechanics; numerical methods; cohesive failure; heterogeneous materials; homogenization
Description du sujet
Context: Engineering materials, such as ceramics or concrete, often exhibit a complex microstructure characterized by multiple scales of heterogeneities, from the nanoscale (1~nm) up to the mesoscale (1~cm). Despite this microstructural complexity, they rarely combine high tensile strength with large toughness. Nature overcame this innate conflict through a hierarchical organization of biomaterials on multiple length scales. The principles underlying these multiscale reinforcement strategies have been successfully applied to create fracture-resistant bioinspired composites.
In the quest to emulate Nature's designs, are we potentially overlooking alternative solutions? Modern challenges require optimizing the fracture properties of engineering materials based on constraints distinct from those found in Nature. To address these new sets of constraints and usher in a new era of high-performance, durable composites, we must expand our focus beyond Nature’s own solutions.
Objectives: The position is part of the project DURABLE funded by the French National Research Agency. The goal of the PhD project is threefold. First, you will develop a numerical method to simulate the propagation of a planar crack in a material containing thousands of heterogeneities. Second, based on simulation results, you will develop a (semi-)analytical homogenization framework that predicts the apparent fracture properties of quasi-brittle composites. Third, you will craft novel patterning strategies for composite design.
Opportunities for growth: You will be part of Navier lab, an international research laboratory dedicated to the mechanics and physics of materials. You will learn forefront concepts in theoretical fracture mechanics, variational calculus, and optimization algorithms. You will receive support to write scientific articles, present your work in international conferences, and write research proposals.
Nature du financement
Financement public/privé
Précisions sur le financement
ANR-24-CE08-5174 DURABLE
Présentation établissement et labo d'accueil
École nationale des ponts et chaussées, created in 1747, trains engineers to a high level of competency. Apart from civil engineering, the School develops high-quality programs and research associated with the energy transition.
You will be part of Navier lab, a joint research unit of the Ecole Nationale des Ponts et Chaussées, the Institut Polytechnique de Paris, and others, focused on mechanics and physics of materials.
Site web :
https://ecoledesponts.fr/
Intitulé du doctorat
Doctorat
Pays d'obtention du doctorat
France
Etablissement délivrant le doctorat
Institut Polytechnique de Paris
Profil du candidat
Potential candidates must have a solid background in solid mechanics, applied physics, and mathematics, computational sciences, or a similar discipline. They must have prior experience in programming and possess fluency in English. Some knowledge of fracture mechanics is a plus.
Date limite de candidature:
31/03/2025
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