The purpose of this work is to investigate the impact of the inner defects of elliptical stratification type upon behavior of the rectangular carbon plastic plate at the impact of static and dynamic loads. The investigation methods: the problem is solved in a numerical way with the aid of a finite ele-ment method (FEM) in the LS-DYNA software com-plex (Livermore Software Technology Corp.). The investigation results: the distribution of stresses in plate layers under the impact of static and dynamic loads is obtained. The distribution of destruc-tion indices with the use of different destruction criteria for unidirectional composites (on the basis of carbon band) is defined. Conclusions: the impact of defects of the type of specified shape stratification, dimensions, amount and places of location with regard to the plate under consideration under the action of compressive static load does not practically tell. Under the action of the compressive dynamic load there is observed a noticeable impact of inner defects upon rectangular plate behavior.

The paper reports the consideration of the behavior and destruction of a reinforced multi-layer flat cylindrical panel made of polymeric composite based on carbon fiber and epoxy binder under the influence of non-stationary loads. There are defined areas of stresses, deflections and indices of destruction for different time periods. To solve the problem there was used a finite element method based on LS-DYNA software complex. The influence of location and dimensions of inner damages under the action of non-stationary fields of pressure is investigated.