ИСТИНА

The failure time coincides with the time when the measure of damage achieves its maximum. The kinetic equation governing the measure of damage is obtained on the basis of the dissipation potential which, in its turn, depends on some energy variable associated with the measure of damage. This energy variable depends on the thermodynamic potential that occurs in the local energy-balance equation and the Clausius-Duhem inequality. The failure time is determined by the energy dissipation due to the breakdown of the interface and the friction resulting from the discontinuity of the interface displacement field. This contribution aims at developing an analytical model for durability of a threecomponent anisotropic media. The model is supposed to provide an insight into the relationship between the properties of the interface and durability of composite materials in the presence of creeping and under complex loading in the interface zone.