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Composites: Mechanics, Computations, Applications, An International Journal

ISSN Print: 2152-2057
ISSN Online: 2152-2073

Composites: Mechanics, Computations, Applications, An International Journal

DOI: 10.1615/CompMechComputApplIntJ.v1.i1.40
pages 45-62

STRENGTH AND LONGEVITY OF POLYMERS AND COMPOSITES UNDER VARIABLE TEMPERATURE−FORCE EXTERNAL CONDITIONS

A. A. Valishin
M. V. Lomonosov Moscow State Academy of Fine Chemical Technology, Moscow
T. S. Stepanova
M. V. Lomonosov Moscow State Academy of Fine Chemical Technology, Moscow
E. M. Kartashov
M. V. Lomonosov Moscow State Academy of Fine Chemical Technology, Moscow

ABSTRACT

The destruction of a material is considered as the process of accumulation in time of internal micro damages. The notion of the material memory-retention of the inflicted damages is introduced. The statement of the direct and inverse problems of predicting the strength and longevity of polymers and composites based on them under variable temperature-force conditions of their testing or maintenance is given. To solve these problems for materials with an arbitrary type of memory, the generalized principle of the superposition of damages has been formulated. Based on it, the solution of the direct problem of prediction is given. Examples are considered. Explanation of the experimentally observed anomalies on the diagrams of the temperature-time dependence of strength is given.

REFERENCES

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  2. Valishin, A. A. and Stepanova, T. S., Application of the multivariable statistical analysis to investigation long-term durability of polymers. Part 2. Computational Experiment.

  3. Kartashov, E. M., Current views on the kinetic thermofluctuation theory of the strength of polymers, in: Development of Science, Series "Chemistry and Technology of High-Molecular-Weight Compounds".

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