Conclusions
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1.
A general approach is suggested for estimating the efficiency of structures made out of composite materials, at whose basis lies a statistical model of the process of micro- and macroscopic failure. The statistical characteristics of micro- and macroscopic failure are determined from the local characteristic — the probability of failure of elements of the microstructure.
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2.
Malmeister's criterion generalized to micrononuniform media is used to determine the probability of the failure of elements of the microstructure of composite materials. The use of a generalized criterion permits estimating the probabilities of both dependent and independent failure of an arbitrary number of elements of the microstructure. The macroscopic failure of a structure is estimated from the critical value of the accumulated macroscopic defects, which is a constant of the material and is determined by computational-experimental means.
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3.
The possibility of the practical use of the approach proposed is shown by the example of estimating the reliability of uniaxially loaded samples made out of É-1200 fiberglass, whose damageability distribution function coincides with the function suggested by Bolotin.
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Translated from Mekhanika Kompozitnykh Materialov, No. 4, pp. 608–614, July–August, 1981.
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Sokolkin, Y.V., Skachkov, V.A. A structural approach for estimating the efficiency of structural elements made out of composite materials. Mech Compos Mater 17, 408–414 (1982). https://doi.org/10.1007/BF00605906
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DOI: https://doi.org/10.1007/BF00605906