THE CONSTITUTIVE EQUATIONS OF AGING MATERIALS TAKING INTO ACCOUNT PHYSICAL AND CHEMICAL PROCESSES

On the basis of experimental investigations, the constitutive equations for aging viscoelastic bodies are suggested which take into account physical and chemical processes in the material. These equations are constructed for the aging process characterized by the emission of volatile substances or change in a mechanical characteristic which is most sensitive to aging. The relations for the material age associated with the aging process are obtained. On the basis of these relations, the creep kernels are constructed.