Mechanical Behaviour of Materials
Materials and Structural Integrity
Applied research into fatigue and fracture of aero-engine materials and components has been carried out at Portsmouth for over 30 years in collaboration with the aerospace industry.
The materials studied include nickel, titanium and aluminium alloys for aeroengines and aeroframes, and composites for satellites and wind turbines. Detailed constitutive models have been implemented in finite element models and numerical studies have been carried out to model crack growth at elevated temperature when creep, fatigue and oxidation may occur concurrently.
A significant knowledge base has been developed on nickel-based superalloys, both in specialist mechanical testing and in modelling using advanced tools including crystal plasticity and discrete dislocation dynamics.
Recent developments include the use of digital image correlation in mapping strain fields of a crack tip and modelling of internal oxidation for life assessment, and monitoring of high temperature steam tubing in power plants.