Research work developed in a multidisciplinary framework with a strong focus on multi-scale and multi-physics modelling. It is structured along three lines: - Modelling of non-linear behaviour of materials and structures, - Characterisation and identification of behaviour laws, - Numerical simulation of structures and processes. There is a wide range of applications, including hot forming processes, stamping of composite preforms, the behaviour of stratospheric pressurised balloons, packaging in power electronics, intensified reactor exchangers, adhesion of coatings, etc.