Numerical Simulation of Concrete Fracture under Extreme Conditions using Phase-Field Methods

About the Project

Concrete structures in energy, industrial, and civil infrastructure are frequently exposed to demanding conditions, such as multiaxial mechanical stresses, fire-induced thermal loading, and/or harsh environmental exposure. Predicting their mechanical behaviour under such conditions remains a major scientific and engineering challenge due to the complex interaction of thermal, mechanical, and chemical processes occurring across multiple scales.

This PhD project will develop a new class of multiphysics, phase-field-based numerical models, implemented within finite element software, to describe damage, cracking, and degradation of concrete subjected to extreme conditions. The research will explicitly account for micro-scale phenomena such as moisture transport, thermal damage, and deterioration of the paste–aggregate interface, linking these mechanisms to the observed macroscopic response.

By combining experimental evidence with advanced numerical methods, the project aims to produce mechanism-based, predictive constitutive models suitable for safety-critical and extreme-condition applications. Particular emphasis will be placed on robust computational implementation and validation against experimental observations.

The PhD offers in-depth training in multiphysics modelling, computational mechanics, and high-temperature material behaviour, providing expertise directly applicable to infrastructure safety, energy facilities, and advanced engineering analysis in international contexts.

The project sits within a research group with established collaborations with major industrial partners—EDF Energy, Unipart Construction Technology, and Sellafield Ltd—and a network of European academic partners, providing real-world engineering context in the energy, nuclear, and infrastructure sectors while maintaining a strong emphasis on fundamental research.

Eligibility Requirements

We welcome applications from candidates worldwide. Applicants should have:

• 1st or 2:1 degree in Engineering, Materials Science, Physics, Chemistry, Applied Mathematics, or other Relevant Discipline.
• Experience in numerical modelling/materials.
• Strong mathematics, physics, and computer programming skills.

If English is not your first language, you may be required to provide evidence of English language proficiency (e.g. IELTS or TOEFL), in accordance with the University of Sheffield requirements.

Research group, collaborations and contact:

The project is embedded within a vibrant and internationally recognised research group, with established collaborations with major industrial partners—EDF Energy, Unipart Construction Technology, and Sellafield Ltd—as well as European academic partners. These collaborations ground the research in real engineering challenges across the energy, nuclear, and infrastructure sectors, while retaining a strong fundamental research focus.

For more details please contact Dr Giacomo Torelli within the School of Mechanical, Aerospace and Civil Engineering at g.torelli@sheffield.ac.uk

Funding Notes

This project is offered on a self-funded or externally funded basis. Applicants must demonstrate access to suitable financial support from personal, national, or institutional sources to cover tuition fees and living expenses. Unfortunately, university funding is not available for this project at this time.