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Leksovskii, A. M.; Baskin, B. L.; Gubanova, G. N.; Yudin, V. E.
Technical physics letters, 12/2020, Letnik: 46, Številka: 12Journal Article
It is shown using the methods of acoustic emission in the version of linear location and internal friction that, upon extension of an initially equilibrium composition (carbon-fiber-reinforced plastic), nonrelaxed stress is accumulated at sites of explosive creation of microcracks. This process is caused by incomplete relaxation redistribution of the stored energy/elastic strain according to the nonlinear mechanism. The increasing level of nonrelaxed stress inevitably transforms a heterogeneous body into the metastable state. Due to this, the dissipative ability of the system as a whole decreases and the probability of occurrence of a nonequilibrium crack increases.
