出版社：Vilnius University, University of Latvia, Latvia University of Agriculture, Institute of Mathematics and Informatics of University of Latvia
摘要：The aim of the work is to develop multi-scale finite element (FE) models of unidirectional fibre composite materials. This enables to create the models of reasonable dimensionality, which are able to present adequately the mechanical behaviour of the highly complex internal micro-structure of the material. As a sample structure, the sheet of epoxy reinforced with fibres is considered. The homogenized material properties of the shell FE at the macro-scale are obtained by performing a proper sequence of numerical experiments on the refined finite element structure of the representative volume of the composite. The representative volume is a micro-cube, the FE model of which presents physical and geometrical properties at the micro-scale periodically recurring within the overall volume of the composite. The behaviour of the micro-cube is simulated including large deformation and failure. Linear material properties are obtained by using pure strains assumptions in the implicit analysis of the micro-cube, while the non-linear behaviour and failure parameters require the explicit dynamic analysis. Simulation is performed by using LS-DYNA finite element software.
