It has been established that exposure to a microwave electromagnetic field with an energy flux density that is rational for each type of composite (carbon-, glass-, organoplastic) contributes to an increase in the specific work of delamination by 18.6 %, 12 % and 20 %, respectively, which satisfactorily correlates with an increase in strength of these materials under three-point bending and interlaminar shear.

The effect of exposure to a microwave electromagnetic field on samples of cured carbon-, glass-, and organoplastics on an epoxy matrix on the strength and change in the nature of interlayer damage during bending deformations has been studied. An increase in the limiting stresses by 14.5, 9.1 and 11%, respectively, a decrease in the size of the delamination region during deformation by 1.5-2 times and its predominant localization in the internal volume of the composite was established. In the control samples, the exits of interlayer cracks to the surface of the material are noted.