The multilayered composite materials generate a negative phenomenon called delamination, that is the weak adhesion within layers at different mechanical strains. The paper approaches theoretical and experimental research made of lignocellulose composites (layers of fibres and gummed chips of wood) and enforced within the marginal areas with one or more layers of carbon, glass or flax fibres. The theories TSAI-WU, HOFFMANN supported by the finite element method, enhance the study of distribution and the intensity of shear stresses within layers. The aim is to minimise the stresses in the light of the following considerations: positioning the enforcing layers; layers thickness related to the composite plate thickness; the variation of fibre-chips of wood weight proportion is to be considered as well.
