| Abstrakt: |
The problem of reveals the limit state of solid materials including the hydrogenous ones has become urgent recently. The state of the material when it is close to the loss of stability is called limit. Different limit criteria are applied depending on the operation conditions (level of the temperature, stress, etc.). They are often different characteristics of physical – mechanical properties. Therefore, the state is limit on the reaching which the material inevitably changes its properties on engaging some structural parameter. It is necessary to reveal such states at the possibly initial stages. First the local structure changes inner stress, physical-mechanical parameters (e.g. the velocity of acoustic waves (AW), ratio ∆V /V% , modulus E and G, etc.) can be used as the limit criteria [ABSTRACT FROM AUTHOR] |
