Resilient material properties, modelling and research
In most cases, material models are developed based on the principles of linear elasticity. However, many new material systems are non-elastic and these simplified models are not able to describe the behaviour of these materials. Non-linearity can be attributed to various mechanical processes such as damage formation, viscoplasticity and viscoelasticity. We are developing various non-linear material models, methodologies for determining experimental parameters and simulation code for modelling various inelastic mechanisms. Non-linear modelling can help to analyse processes such as polymer curing, shrinkage, material behaviour at elevated temperature or humidity, as well as to simulate natural composite materials and other complex material systems or structures.
Research areas developed:
Development of models for intrinsically elastic materials, including viscoplasticity, viscoelasticity, damage;
Development of methodologies for the determination of parameters of elastic materials;
Mechanics of composite materials;
Biological composite materials;
EQUIPMENT: Compression, tension and flexural creep benches.
SOFTWARE: ANSYS, Matlab
Stress-strain curves for linear and non-linear materials
Comparison of experimental curves and simulations of developed non-linear material models for a natural fibre composite
Crack in biocomposite material (regenerated cellulose fibres)
Implementation of a multi-scale nonlinear viscoelastic and viscoplastic material model with the finite element method