科研之友
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摘要
Fracturing of polymer composites reinforced by randomly distributed short fibers with a partial orientation is studied. The proposed layered model of the composite makes it possible to derive the differential equation for the description of fracturing in the composites during loading. Numerical analysis makes it possible to distinguish the principal stages of fracturing: the incubation period, the progressing stage, and the avalanche-like stage. For the composites with a constant coefficient of strength variations, the critical degree of damage at the instant of fracture remains constant. In the other case, on condition that all other conditions are the same, the critical stress in the remaining undamaged part of the sample is constant. The results of theoretical calculations are supported by experimental evidence. The revealed principal features are assumed to be characteristic of practically all systems during their transition from one stable state to another in the course of fracturing and during the processes of acquirement of any new property.
- 出版日期2010-2
