ИСТИНА

The first part of the research describes common assumptions for material degradation theory and the main part of the presented study focuses on development of simplified constitutive relations suitable for practical applications in testing and characterization of composite materials. Final part of this work dedicated to the extension of performed approach to capture complex effects such as initial shear nonlinearity of laminated composites and influence of high strain rate on strength properties. The results obtained show a good correlation between proposed modelling method and analysed experimental data.